Chi-Min Shu

National Yunlin University of Science and Technology, Tou-liu, Taiwan, Taiwan

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Publications (111)197.21 Total impact

  • Shang-Hao Liu, Chi-Min Shu, Hung-Yi Hou
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    ABSTRACT: In 2011, a large petrochemical complex in Taiwan incurred several fire and explosion accidents, which had considerable negative impact for the industry on both environmental and safety issues. Reactive substances are widely used in many chemical industrial fields as an initiator, hardeners, or cross-linking agents of radical polymerization process with unsaturated monomer. However, the unpredictable factors during the process having risk to runaway reaction, thermal explosion, fire, and exposure to harmful toxic chemicals release due to the huge heat and gas products by thermal decomposition could not be removed from the process. This study used differential technology of thermal analysis to characterize the inherent hazard behaviors of azo compounds and organic peroxides in the process, to seek the elimination of the source of the harmful effects and achieve the best process safety practices with zero disaster and sound business continuity plan.
    Journal of Loss Prevention in the Process Industries 11/2014; · 1.35 Impact Factor
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    ABSTRACT: In recent years, we have witnessed a deluge of multimedia data such as texts, images, and videos. However, the research of managing and retrieving these data efficiently is still in the development stage. The conventional tag-based searching approaches suffer from noisy or incomplete tag issues. As a result, the content-based multimedia data management framework has become increasingly popular. In this research direction, multimedia high-level semantic concept mining and retrieval is one of the fastest developing research topics requesting joint efforts from researchers in both data mining and multimedia domains. To solve this problem, one great challenge is to bridge the semantic gap which is the gap between high-level concepts and low-level features. Recently, positive inter-concept correlations have been utilized to capture the context of a concept to bridge the gap. However, negative correlations have rarely been studied because of the difficulty to mine and utilize them. In this paper, a concept mining and retrieval framework utilizing negative inter-concept correlations is proposed. Several research problems such as negative correlation selection, weight estimation, and score integration are addressed. Experimental results on TRECVID 2010 benchmark data set demonstrate that the proposed framework gives promising performance.
    2014 IEEE International Conference on Semantic Computing (ICSC); 06/2014
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    ABSTRACT: Isoprene monomer (IPM) is a colorless, volatile liquid obtained from petroleum or coal tar that occurs naturally in many process plants. It is used chiefly to make synthetic rubber. Our study used calorimetric approaches to conduct thermal analysis and hazard assessment of aluminum oxide (Al2O3) and IPM relevant studies. Differential scanning calorimetry, thermal activity monitor III, thermogravimetry, and vent sizing package 2 were used to discuss thermal instability reaction of Al2O3, which adsorbed IPM, and find every possible reason for cases of fire to prevent any future recurrence of the package store and transport related hazards. By means of calorimetric analysis technology, we can observe thermal decomposition or mass loss for different adsorbed concentrations of IPM and Al2O3 to discuss the related thermal stability parameters, such as exothermic onset temperature (T 0), heat of decomposition (ΔH d), self-accelerating exothermic rate (dT dt −1), pressure rise rate, and maximum reaction temperature (T max). Then, we can understand the potential hazard factors that contribute to disasters related to processing, transport, and storage of security controls and reaction process design.
    Journal of Thermal Analysis and Calorimetry 06/2014; 116(3). · 2.21 Impact Factor
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    ABSTRACT: Lauroyl peroxide (LPO) is a commonly used organic peroxide that has caused many thermal runaway reactions and explosions worldwide. Differential scanning calorimetry (DSC) was used to investigate the thermal decomposition of LPO and its exothermic onset temperature, reaction heat, and other safety parameters for prevention of runaway reactions and thermal explosions. Pre-exponential factor and apparent activation energy were determined by Friedman isoconversional method, which demonstrates that the decomposition of LPO shows a multi-step nature. The kinetic parameters and heat balance were analyzed and used for simulation of the adiabatic behavior time to maximum rate under adiabatic conditions (TMRad) and self-accelerating decomposition temperature (SADT). When the initial temperature is 32.7 °C, TMRad equals 24 h and calculated SADT of LPO is 45 °C. Application of finite element analysis (FEA) and accurate kinetic description allows determining the effect of scale, geometry, heat transfer, thermal conductivity, and ambient temperature on the heat accumulation. The reaction progress (α) and temperature distribution can be determined quantitatively at every point in time and space. This information is essential for the design of containers of LPO, cooling systems, and the measures to be taken in the event of a cooling failure.
    Journal of the Taiwan Institute of Chemical Engineers 03/2014; 45(2):461–467. · 2.64 Impact Factor
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    ABSTRACT: Compared to tunnels used for other modes of transportation, fire safety design problems in road tunnels are more challenging because of high-speed wind environmental impact. A video-based fire detection system (VFDS) applies inventive mathematical calculations and sophisticated computer models to analyze and tackle real-time video signals statistically and intelligently. VFDS-based temporal flicker modeling of flames and wavelet-based contour modeling approaches are used as weak classifiers. Experimental results have shown that false alarms issued by earlier methods can be significantly reduced by using separate flame and non-flame moving pixels. Whenever the system detects fire or smoke under wind or no wind environment, the VFDS server initiates actions, including visual and audible alarms, alarm messages, and video recording.
    Tunnelling and Underground Space Technology 02/2014; 40:16–21. · 1.59 Impact Factor
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    ABSTRACT: In this study, the thermal hazard features of various lithium-ion batteries, such as LiCoO2 and LiFePO4, were assessed properly by calorimetric techniques. Vent sizing package 2 (VSP2), an adiabatic calorimeter, was used to measure the thermal hazards and runaway characteristics of the 18650 lithium-ion batteries under an adiabatic condition. The thermal behaviors of the lithium-ion batteries were obtained at normal and abnormal conditions in this study. The critical parameters for thermal hazardous behavior of lithium-ion batteries were obtained including the exothermic onset temperature (T 0), heat of decomposition (ΔH), maximum temperature (T max), maximum pressure (P max), self-heating rate (dT/dt), and pressure rise rate (dP/dt). Therefore, the result indicates the thermal runaway situation of the lithium-ion battery with different materials and voltages in view the of TNT-equivalent method by VSP2. The hazard gets greater with higher voltage. Without the consideration of other anti-pressure measurements, different voltages involving 3.3, 3.6, 3.7, and 4.2 V are evaluated to 0.11, 0.23, 0.88, and 1.77 g of TNT. Further estimation of thermal runaway reaction and decomposition reaction of lithium-ion battery can also be confirmed by VSP2. It shows that the battery of a fully charged state is more dangerous than that of a storage state. The technique results showed that VSP2 can be used to strictly evaluate thermal runaway reaction and thermal decomposition behaviors of lithium-ion batteries. The loss prevention and thermal hazard assessment are very important for development of electric vehicles as well as other appliances in the future. Therefore, our results could be applied to define important safety indices of lithium-ion batteries for safety concerns.
    Journal of Thermal Analysis and Calorimetry 12/2013; · 2.21 Impact Factor
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    ABSTRACT: This study evaluated the effectiveness and performance of smoke management models in a TFT-LCD cleanroom. Several smoke management models are discussed in a distinct 3-level cleanroom compartment. The tools used included a fire dynamics simulator (FDS) and SIMULEX. The design fires were 3 MW and 5.4 MW in ultra fast fire, respectively. In life safety, both a downward smoke exhaust system and upward smoke exhaust system, incorporating a decrease of filter fan unit air supply rate, could be used in a cleanroom, according to the simulation results of performance-based design. For occupant evacuation, the SIMULEX results showed a total evacuation time less than smoke layer descending time, which descended to 1.8 m height from floor to smoke layer in all FDS simulations. In view of property protection, insurance companies generally require significantly higher standards of property protection. For 3 MW or more heat release rate, smoke was hardly controlled by any smoke exhaust system in the cleanroom without sprinklers.
    Building Simulation 12/2013; · 0.63 Impact Factor
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    ABSTRACT: This study investigates the removal efficiency of PVA from aqueous solutions using UV irradiation in combination with the production of electrogenerated hydrogen peroxide (H2O2) at a polyacrylonitrile-based activated carbon fiber (ACF) cathode. Three cathode materials (i.e., platinum, graphite, and ACF) were fed with oxygen and used for the electrogeneration of H2O2. The amount of electrogenerated H2O2 produced using the ACF cathode was five times greater than that generated using the graphite cathode and nearly 24 times greater than that from platinum cathode. Several parameters were evaluated to characterize the H2O2 electrogeneration, such as current density, oxygen flow rate, solution pH, and the supporting electrolyte used. The optimum current density, oxygen flow rate, solution pH, and supporting electrolyte composition were found to be 10 mA cm−2, 500 cm3 min−1, pH 3, and Na2SO4, respectively. The PVA removal efficiencies were achieved under these conditions 3%, 16%, and 86% using UV, H2O2 electrogeneration, and UV/H2O2 electrogeneration, respectively. A UV light intensity of 0.6 mW cm−2 was found to produce optimal PVA removal efficiency in the present study. A simple kinetic model was proposed which confirmed pseudo-first-order reaction. Reaction rate constant () was found to depend on the UV light intensity.
    International Journal of Photoenergy 09/2013; 2013(Article ID 841762):9 pages. · 2.66 Impact Factor
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    ABSTRACT: In recent years, organic peroxides, including methyl ethyl ketone peroxide (MEKPO) and cumene hydroperoxide (CHP), have often caused thermal runaway reactions, fires, and thermal explosions worldwide. Under normal circumstances, H2O and dry fire-extinguishing chemicals are often employed to eliminate fire situations. We evaluated the thermal runaway reaction for MEKPO and CHP mixed with H2O and dry fire-extinguishing chemicals by differential scanning calorimetry, and thermal runaway reaction for CHP mixed with dry fire-extinguishing chemicals by vent sizing package 2. The results showed that ABC dry chemical, BC dry chemical, and XBC dry chemical all caused the decomposition of MEKPO to occur at lower onset temperature and H2O caused the ΔH d of MEKPO to become higher. On the other hand, H2O and XBC dry chemical induced the decomposition of CHP to occur at lower onset temperature as well as lower thermal explosion temperature. The maximum of self-heating rate ((dT/dt)max) and the maximum pressure-rise rate ((dP/dt)max) of CHP mixed with dry fire-extinguishing chemicals were measured lower than CHP alone. The results indicated that MEKPO and CHP are highly hazardous when mixed with H2O and some dry fire-extinguishing chemicals. In view of loss prevention, the results can be useful references for fire fighters dealing with thermal upsets in chemical plants.
    Journal of Thermal Analysis and Calorimetry 09/2013; · 2.21 Impact Factor
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    ABSTRACT: Determining the explosion limits of chemical substances is exceptionally critical while considering prevention of loss in manufacturing processes. The accidental explosions of flammable liquid/gas mixtures are second to none in loss prevention issues. In a previous study, we found a theoretical linear correlation between the reciprocal of the explosion limits and the reciprocal of the molar fraction of hydrocarbons diluted with inert carbon dioxide or nitrogen. In this study, we estimated the effects of inert liquid/gas (H2O), which dilute flammable vapors or gases. The experiments measured the explosion limits of isopropyl alcohol with steam at initial conditions of 1 atm and 150 °C by a 20-L-apparatus. We compared the experimental values with the theoretical model, and found that a linear correlation still exists. The results demonstrated that the experimental values fit the theoretical model well.
    Journal of Thermal Analysis and Calorimetry 09/2013; · 2.21 Impact Factor
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    ABSTRACT: Isothermal microcalorimetry can be used to investigate the thermokinetic parameters for reactive mechanisms. Benzoyl peroxide (BPO), a typical organic peroxide, undergoes an autocatalytic reaction under isothermal decomposition. It requires intrinsically safer design of preparation, manufacturing, transportation, storage, and even disposal. The scope of this study was to describe the exothermic reaction and reaction model of BPO and mixed with benzoic acid by the thermal activity monitor III (TAM III). The results showed the isothermal kinetic parameters, such as activation energy (E a), frequency factor (A), heat of decomposition (ΔH d), and time to maximum rate under isothermal conditions (TMR iso), which were necessary and useful to insure safe storage or transportation for self-reactive substances applied in the process industries.
    Journal of Thermal Analysis and Calorimetry 09/2013; · 2.21 Impact Factor
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    ABSTRACT: To accomplish an effective analysis of adsorption, the strong acid dye from aqueous solution of sodium alginate (SA) and multi-walled carbon nanotubes (MWCNTs) composite gel beads were used as important parameters. Differential scanning calorimetry (DSC) was used to measure the heat of breakdown reaction. The experimental conditions were set at 0.5, 1, 2, 4, and 8 °C min−1, and the temperature range was 30–300 °C. The heating rates and the temperature range were set as follows: Four kinds of proportion in this experiment contained 2 SA % w/v (SA), 0.03, 0.09, 0.18, 0.36 % w/v (MWCNTs), and 10 % w/v calcium chloride, respectively. Four samples, 5, 6, 7, 8, and 9 mg, were used to detect the experimental data. It contributed to understanding the reaction for the distinctive MWCNTs. With the thermokinetic data by isoconversional approach obtained from advanced kinetics and technology solutions (AKTS), the related thermal safety information can be obtained from the thermal reaction of MWCNTs. Valuable parameters, such as activation energy (E a) and heat of decomposition, can be applied in operation, including adsorption and desorption processes. After DSC tests, and under the four compositions of SA/MWCNTs, at different heating rates of 0.5, 1, 2, 4, and 8 °C min−1, primarily we found that when the heating rate was increased, exothermic onset temperature would increase gradually. After analyzing E a value by isoconversional kinetics, we learned that in four different adsorption compositions, SA/MWCNTs0.03 (161.20 kJ mol−1) was the minimum. Among them, the highest value was SA/MWCNTs0.18 (220.48 kJ mol−1). However, in this study, for SA/MWCNTs compositions we found that E a value will drop in the final material SA/MWCNTs0.36. Accordingly, if the ratio of SA and calcium chloride was fixed, then different compositions of the MWCNTs would affect adsorption efficiency of SA/MWCNTs and E a variation.
    Journal of Thermal Analysis and Calorimetry 09/2013; · 2.21 Impact Factor
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    ABSTRACT: tert-Butyl hydroperoxide (TBHP, 70 mass %), which is a solution of liquid peroxide, has been widely employed in the chemical industry as a polymerization initiator. The smart technology for predicting the mechanism of thermal decomposition and the inhibitive or hazardous reaction of TBHP by different calorimetric tests involves using differential scanning calorimetry (DSC) nonisothermal tests versus DSC isothermal tests and vent sizing package 2 (VSP2) adiabatic tests versus DSC nonisothermal tests, respectively, for further understanding how to extinguish organic peroxide accidents under fire scenario or runaway reaction in a chemical plant. Meanwhile, TBHP mixed with inhibitive and hazardous materials, such as various protic acids to help prevent runaway reactions, was applied on fires or explosions in the fire system. The results could be available to fire-related agencies as a reference application. The fire extinguishing system must be well-designed to decrease the degree of hazard.
    Industrial & Engineering Chemistry Research 08/2013; 52(32):10969–10976. · 2.24 Impact Factor
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    ABSTRACT: tert-Butyl peroxy-2-ethyl hexanoate (TBPO), an organic peroxide broadly used as initiator for polymerization of ethylene, styrene, methyl methacrylate, and acrylonitrile, has the characteristic of triggering a highly exothermic reaction. Mixing with a contaminant, such as metal ions, may result in a runaway reaction and acceleration decomposition under an abnormal situation. We investigated how Cu2+, Ni2+, and Fe2+ individually affected the thermal decomposition of TBPO. Our aim was to explore the thermal hazard of TBPO mixed with metal ions by calorimetric techniques combined with thermokinetic models. We employed nonisothermal and isothermal calorimeters to determine various thermokinetic and safety parameters, including exothermic onset temperature (To), peak temperature (Tp), final temperature (Tf), heat of decomposition (ΔHd), and maximum heat flow (Qmax) by differential scanning calorimetry (DSC) and thermal activity monitor III (TAM III). Moreover, the isothermal and nonisothermal kinetic models were applied to predict time to maximum rate under adiabatic conditions (TMRad), adiabatic temperature rise (ΔTad), time to conversion limit (TCL), control temperature (CT), emergency temperature (ET), and self-accelerating decomposition temperature (SADT). From the experimental results, Cu2+ could significantly affect TBPO to increase Qmax more than 2-fold as compared to the rest and T0 was advanced as well. Therefore, TBPO contamination by Cu2+ should be avoided during every stage of the manufacturing process.
    Industrial & Engineering Chemistry Research 06/2013; 52(24):8206–8215. · 2.24 Impact Factor
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    ABSTRACT: Plenty of thermal explosions and runaway reactions of cumene hydroperoxide (CHP) were described from 1981 to 2010 in Taiwan. Therefore, a thermal explosion accident of CHP in oxidation tower in 2010 in Taiwan was investigated because of piping breakage. In general, high concentration of CHP for thermal analysis using the calorimeter is dangerous. Therefore, a simulation method and a kinetic parameter were used to simulate thermal hazard of high concentrations of CHP only by the researcher. This study was applied to evaluate thermal hazard and to analyze storage parameters of 80 and 88 mass% CHP using three calorimeters for the oxidation tower, transportation, and 50-gallon drum. Differential scanning calorimetry (DSC) (a non-isothermal calorimeter), thermal activity monitor III (TAM III) (an isothermal calorimeter), and vent sizing package 2 (VSP2) (an adiabatic calorimeter) were employed to detect the exothermic behavior and runaway reaction model of 80 and 88 mass% CHP. Exothermic onset temperature (T 0), heat of decomposition (ΔH d), maximum temperature (T max), time to maximum rate under isothermal condition (TMRiso) (as an emergency response time), maximum pressure (P max), maximum of self-heating rate ((dT/dt)max), maximum of pressure rise rate ((dP/dt)max), half-life time (t 1/2), reaction order (n), activation energy (E a), frequency factor (A), etc., of 80 and 88 mass% CHP were applied to prevent thermal explosion and runaway reaction accident and to calculate the critical temperature (T c). Experimental results displayed that the n of 80 and 88 mass% CHP was determined to be 0.5 and the E a of 80 and 88 mass% CHP were evaluated to be 132 and 134 kJ mol−1, respectively.
    Journal of Thermal Analysis and Calorimetry 01/2013; 111(1). · 2.21 Impact Factor
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    ABSTRACT: Thermal runaway hazards related to adiabatic runaway reactions in various 18650 Li-ion batteries were studied in an adiabatic calorimeter with vent sizing package 2 (VSP2). We selected two cathode types, LiCoO2 and Li(Ni1/3Co1/3Mn1/3)O2, and tested Li-ion batteries to determine the thermal runaway features. The charged 18650 Li-ion batteries were tested to evaluate the thermal hazard characteristics, such as the initial exothermic temperature (T0), self-heating rate (dT/dt), pressure rise rate (dP/dt), pressure–temperature profiles, maximum temperature (Tmax) and pressure (Pmax), which are measured by VSP2 with a customized stainless steel test can. The thermal reaction behaviors of the Li-ion battery packs were shown to be an important safety concern for energy storage systems for power supply applications. The thermal abuse trials of the adiabatic calorimetry methodology used to classify the self-reactive ratings of the various cathodes for Li-ion batteries provided the safety design considerations.
    Applied Energy 12/2012; 100:127–131. · 5.26 Impact Factor
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    ABSTRACT: Thermal degradation of triacetone triperoxide (TATP) was studied using differential scanning calorimetry (DSC) and gas chromatography/mass spectrometry (GC/MS). TATP, a potential explosive material, is powerful organic peroxide (OP) that can be synthesized by available chemicals, such as acetone and hydrogen peroxide in the laboratory or industries. The thermokinetic parameters, such as exothermic onset temperature (T0) and heat of decomposition (ΔHd), were determined by DSC tests. The gas products from thermal degradation of TATP were identified using GC/MS technique.In this study, H2O2 was mixed with propanone (acetone) and H2SO4 catalysis that produced TATP. The T0 of TATP was determined to be 40 °C and Ea was calculated to be 65 kJ/mol. A thermal decomposition peak of H2O2 was analyzed by DSC and two thermal decomposition peaks of H2O2/propanone were determined. Therefore, H2O2/propanone mixture was applied to mix acid that was discovered a thermal decomposition peak (as TATP) in this study. According to risk assessment and analysis methodologies, risk assessment of TATP for the environmental and human safety issue was evaluated as 2-level of hazard probability rating (P) and 6-level of severity of consequences ratings (S). Therefore, the result of risk assessment is 12-point and was evaluated as “Undesirable” that should be enforced the effect of control method to reduce the risk.
    Journal of Loss Prevention in the Process Industries 11/2012; 25(6):1069–1074. · 1.35 Impact Factor
  • Jen-Hao Chi, Sheng-Hung Wu, Chi-Min Shu
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    ABSTRACT: The before fire assessment data from the ARC fire risk assessment system and the financial loss from post-fire damage report for factory-type buildings located in Taiwan were collected. The correlation between assessment data and degree of fire loss (DFL) was calculated by three regression analyses – linear, power, and exponential equations – to produce an anticipation formula. The results revealed that there is more a believable prediction when the fire loss is bigger, regardless of the amount of fire loss or the DFL, while the latter is more related to the assessment grade. By providing proprietors and insurance companies detailed fire risk analysis showing predictable financial loss, it is advantageous for budget management and fire protection, enforcement and should result in the reduction of fire risk and subsequent damage to factory-type buildings.
    Journal- Chinese Institute of Engineers 10/2012; · 0.21 Impact Factor
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    ABSTRACT: When above certain temperature limits, lauroyl peroxide is an unstable material. If the thermal source cannot be properly governed during any stage in the preparation, manufacturing process, storage or transport, runaway reactions may inevitably be induced immediately. In this study, the influence of runaway reactions on its basic thermal characteristic was assessed by evaluating thermokinetic parameters, such as activation energy (E a) and frequency factor (A) by thermal activity monitor III (TAM III). This was achieved under five isothermal conditions of 50, 60, 70, 80, and 90 °C. Vent sizing package 2 (VSP2) was employed to determine the maximum pressure (P max), maximum temperature (T max ), maximum self-heating rate ((dT dt −1)max), maximum pressure rise rate ((dP dt −1)max), and isothermal time to maximum rate ((TMR)iso) under the worst case. Results of this study will be provided to relevant plants for adopting best practices in emergency response or accident control.
    Journal of Thermal Analysis and Calorimetry 09/2012; 109(3). · 2.21 Impact Factor
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    ABSTRACT: Liquid organic peroxides have been broadly employed in the process industries such as tert-butyl peroxy-2-ethyl hexanoate (TBPO). This study investigated the thermokinetic parameters of TBPO, a typical liquid organic peroxide, by isothermal kinetic algorithms and non-isothermal kinetic algorithms with thermal activity monitor III, and differential scanning calorimetry, respectively. An attempt has been made to determine the thermokinetic parameters by simulation software, such as exothermic onset temperature (T 0), maximum temperature (T max), decomposition (∆H d), activation energy (E a), self-accelerating decomposition temperature, and isothermal time to maximum rate (TMRiso). A liquid thermal explosion model was established for a reactor containing liquid organic peroxide of interest. From experimental results, liquid organic peroxides’ optimal conditions for avoiding a violent runaway reaction of storage and transportation were created.
    Journal of Thermal Analysis and Calorimetry 09/2012; 109(3). · 2.21 Impact Factor

Publication Stats

530 Citations
197.21 Total Impact Points

Institutions

  • 2001–2014
    • National Yunlin University of Science and Technology
      • Department of Safety, Health and Environmental Engineering
      Tou-liu, Taiwan, Taiwan
  • 2010–2013
    • R.D. University
      Jubbulpore, Madhya Pradesh, India
    • China Medical University (ROC)
      臺中市, Taiwan, Taiwan
  • 2012
    • Nanjing University of Science and Technology
      Nan-ching, Jiangsu Sheng, China
  • 2011
    • WuFeng University
      Chia-i-hsien, Taiwan, Taiwan
  • 2009
    • Wufeng Institute of Technology
      Kao-hsiung-shih, Kaohsiung, Taiwan
  • 2008
    • National Chung Hsing University
      • Department of Chemistry
      Taichung, Taiwan, Taiwan
  • 2000–2004
    • University of Miami
      • Department of Electrical and Computer Engineering
      Coral Gables, FL, United States