Antonio Marcilla Gomis

• PhD
• Professor (Full) at University of Alicante

The thermal decomposition of a heat-not-burn (HNB) tobacco at four temperatures (250–400 °C) was studied via thermogravimetric analysis (TGA) and Multi-shot pyrolizer experiments (Py-GC/MS), and the effect of four potential additives, USY Beta and beta zeolites and Silica Lovel 6000 and SBA-15 silicates at three concentrations (5, 15 and 25% w/w) u...

El objetivo de este estudio es determinar la capacidad de almacenamiento energético del material obtenido de cascarilla de cacao en configuración de capacitor. El material lignocelulósico proviene de la cosecha de cacao ecuatoriano utilizado en procesos agroindustriales. Se realizó el análisis de los volátiles generados durante la pirólisis instant...

Sugarcane bagasse (Saccharum officinarum) is a widely spread residual biomass from the sugar industry that can be valorized through pyrolysis. The spectrum of the fractions obtained will vary depending on the pyrolysis conditions selected. In this work, the influence of alkaline treatments on the raw material has been studied. The sugarcane residue...

Nowadays, the use of tobacco biomass as an energy source is being valued. Therefore, it is important to know the processes that take place during combustion and pyrolysis, as well as the substances that are formed. In this work, we study the compounds obtained during the decomposition of NNN as a function of temperature under inert and oxidant atmo...

Thermal decomposition of cocoa pod husks under inert and oxidizing atmospheres was studied. Samples from Cotopaxi, Ecuador were used as raw material. Thermogravimetry based experiments were used to obtain decomposition data vs. temperature. A novel strategy to fit the TG and DTG curves was used giving good fit by considering, in the kinetic model,...

The adequate correlation of experimental phase equilibrium data by using any thermodynamic model represents a key point for the rigorous design of the chemical processes. However, this data correlation process remains a challenging problem, due to the high nonlinearity of the models used and the consequent problems of convergence. The present work...

Similar to previous MatLab Graphical User Interfaces (GUI’s) developed to systematically check the consistency of LLE data correlation results, GMcal_TieLinesLL (v.2.2) [http://rua.ua.es/dspace/handle/10045/51725], or Boundaries_LL_NRTL [http://hdl.handle.net/10045/121471] for the analysis of the miscibility boundaries that the NRTL model present,...

Five potential additives, three zeolites and two silicates, have been studied for reducing the amount of compounds generated when smoking Heet tobacco. Pyrolysis-gas chromatography-mass spectrometry experiments (Py-GC/MS) show that this type of tobacco generates large amounts of nicotine and glycerol and compounds such as phenol, acetaldehyde, acet...

TOPOLOGICAL ANALYSIS OF THE GM FUNCTION IN LIQUID-LIQUID EQUILIBRIUM CORRELATION DATA FOR TERNARY AND BINARY SYSTEMS (NEW VERSION 2.2). RUA 2022: http://hdl.handle.net/10045/51725 A single and very easy to use Graphical User Interface (GMcal_TieLinesLL) based on the topological information contained in the Gibbs energy of mixing function has bee...

Several physical properties and the isobaric vapour-liquid equilibria at 101.32, 50, and 30 kPa were measured for the binary system consisting of acetone and the ionic liquid 1-ethyl-3-methyl-imidazolium acetate. Liquid-liquid equilibrium data were also measured at temperatures from 298.15 up to 328.35 K and atmospheric pressure. An hourglass-shape...

Thermal and catalytic pyrolysis of a tobacco blend were studied by pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS). The Py-GC/MS experiments were carried out in helium and air atmosphere at 300, 500 and 700 °C. SBA-15 mesoporous silica has been used as a catalyst blended with the tobacco at 5%, 15% and 50%. The results obtained show that...

In a similar way to the previous Graphical User Interface (GUI) developed to systematically check the consistency of LLE data correlation results, GMcal_TieLinesLL v.2.2 [http://rua.ua.es/dspace/handle/10045/51725], this second Graphical User Interface (Boundaries_LL_NRTL: http://hdl.handle.net/10045/121471) has been developed as a friendly tool fo...

The analysis of thermal behaviour of materials has been commonly used for their characterization and identification. This work aims to analyse the thermal decomposition and the pyrolytic products from leather of different animal species and tanning processes in order to discriminate them. The animal species studied were bovine hide, horsehide, pigs...

The synthesis of SBA-15 has been optimized using sodium silicate, an inexpensive precursor of SBA-15. In this work, the influence of synthesis times of the precipitation and the hydrothermal treatment steps, on the textural properties developed as well as for reducing the toxic compounds generated in tobacco smoking, has been studied. The hydrother...

SBA-15 has been employed as a tobacco additive with the objective of reducing the toxic and carcinogenic components in tobacco smoke. The effect of the synthesis conditions (temperature, time, and stirring rate) on this application was studied in this paper. The SBA-15 was characterized (RDX, N2 adsorption isotherms, SEM and apparent density), mixe...

Liquid-liquid equilibrium (LLE) data correlation of multicomponent mixtures is frequently carried out without using any procedure to ensure that the model parameters obtained for the totally miscible binary mixtures are consistent with such behavior (i.e. they do not lead to two liquid phases in equilibrium). In other words, the behavior of the mod...

Leather tanned with different agents was pyrolyzed in the presence of CoCl2 and MnCl2 catalysts. A bovine leather sample tanned with two inorganic tanning agents (chromium and titanium salts) and two organic tanning agents (glutaraldehyde and methylacrylic resin) has been used in this study. The samples were soaked in solutions of CoCl2 or MnCl2 of...

The composition of evolved slow pyrolysis products under inert and oxidising atmospheres of reference tobacco from the University of Kentucky and its mixture with an SBA-15 mesoporous silica have been measured using a multishot pyrolyser attached directly to a gas chromatography/mass spectrometer. The results obtained show that under an inert atmos...

In this work, LLE data at different temperatures have been correlated for 30 binary systems that presented different miscibility behaviour: 15 upper critical solution temperature (UCST), 5 critical solution temperature (LCST) and 10 closed loop LLE region systems. The NRTL model along with an expression frequently used in literature for the tempera...

Different SBA-15 (SBA, Santa Barbara Amorphous) materials were synthetized at different temperature and time during of the hydrothermal treatment. The obtained SBA-15 were characterized by N2 adsorption isotherms, scanning electron microscopy (SEM), X-ray diffraction (DRX), and density in order to establish the influence of these variables on their...

Aqueous two-phase systems involve a limited region of a complicated phase diagram usually containing solid phases. Studies regarding these systems generally focus on the liquid-liquid region because it provides a suitable medium for liquid extraction of biomolecules and metal ions. In this work, the whole phase diagram was determined for ternary mi...

Ionic liquids are being proposed for the improvement of many refinery-related applications where water and oil coexist. However, the lack of relevant thermodynamic data on equilibrium processes involving water, oil and an ionic liquid is a stumbling block. Phase diagrams of these systems are complex, with many different regions, especially when the...

Animal by-products consist in parts of animals or products of animal origin not intended for human consumption. The recovery and treatment of this kind of waste is a challenging problem due to their high volume and heterogeneous nature. In this sense, previous studies have shown that hydrothermal liquefaction (HTL) can be a viable technology for tr...

Hydrothermal liquefaction (HTL) of Animal By-Products (ABP) is a promising technology for their recycling and disposal. Different operating parameters have been studied to determine their influence on the process. Higher heating values of biocrudes ranging between 35 and 39 MJ/kg have been obtained showing a maximum yield of 61% at 225 °C. At low H...

The necessity of using a pressure (P) or temperature (T) dependence in the Gibbs energy of mixing of the liquid phase (g M,L ) for some isothermal (or isobaric) VLE data sets, respectively, is discussed in this paper. A graphical representation, directly obtained from the experimental data, is proposed as a method to clearly classify the behaviour...

Pyrolysis and oxidation reactions involving four types of tobacco (a flue-cured Virginia, an air-cured Burley, a fire-cured Kentucky, and Oriental) and a tobacco reference (3R4F), which is a US blended tobacco of burley, virginia and oriental, are studied in a thermogravimetric analyser coupled to a Fourier-transform infrared (TG-FTIR) spectrometer...

In this work, the effect of sodium citrate mixed with tobacco, in presence and absence of SBA‐15 material, was studied by TGA/FTIR under N2 and air atmospheres. Depending on the atmosphere used, the decomposition of sodium citrate changes considerably at high temperatures, mainly due to the oxidation of the residue. The analysis of the experimental...

Running vapor-liquid equilibrium (VLE) data correlation with interaction parameters independent of temperature is a common practice that may lead to incongruous situations, which may remain unnoticed. A non-negligible number of VLE data sets for binary systems appear very poorly correlated in literature by using any of the existing models with cons...

Life Cycle Assessment (LCA) and Life Cycle Cost (LCC) for an Animal By Products (ABP) hydrothermal liquefaction (HTL) plant and conventional pyrolysis plant have been developed from the experimental data obtained at laboratory scale. The costs of the plants as well as the environmental impacts produced have been compared.

The correlation of experimental equilibrium data by using any thermodynamic model is an essential task in order to allow the optimal design or simulation of the equipment or processess where that equilibrium is present. In this sense, the quality of the calculations made, especially in liquid-liquid equilibrium systems, depends strongly on the accu...

Citrates are common burning aids added to tobacco. In this work, the effect of the cation present in the citrate, sodium and potassium, on its thermal and oxidative decomposition was studied. Citrates decompose in three stages, elimination of water, loss of CO2, and decomposition of the remaining material. Under N2 atmosphere, the first stage occur...

This paper presents a preliminary study of the characterization of real waste from slaughterhouses as well as their rendering products (protein and fat) through different pyrolytic techniques: thermogravimetric analysis (TG), analytical pyrolysis in a pyroprobe equipment and hydrothermal liquefaction process (HTL). The experiments have allowed a de...

In this work, the thermal and SBA-15 catalytic pyrolysis of potassium citrate has been studied by TGA/FTIR. According to the TGA results, in the absence of a catalyst, a decomposition mechanism based on a sequence of four consecutive reactions is proposed, yielding a solid residue plus potassium carbonate, which at temperatures of 650 oC evolves to...

http://hdl.handle.net/10045/5990 El presente trabajo pretende mostrar la utilización de una herramienta gráfica para consolidar, por ejemplo en estudios de Ingeniería Química y Química, los aspectos fundamentales del cálculo del equilibrio entre fases condensadas y el criterio de isoactividad, necesarios para la correcta utilización de cualquier mo...

The review of a representative number of papers published in recent years that include the correlation of experimental liquid-liquid equilibrium (LLE) data has been carried out, after detecting serious inconsistencies in some of the parameters recently published. The result of this analysis shows that surprisingly many published parameters and calc...

The difficulty in achieving a good thermodynamic description of phase equilibria is finding a model that can be extended to a large variety of chemical families and conditions. This problem worsens in the case of systems containing more than two phases or involving complex compounds such as ionic liquids. However, there are interesting applications...

Ponchon-Savarit is a classical graphical method for the design of binary distillation columns. This method is still widely used, mainly with didactical purposes, though it is also valid for preliminary calculations. Nevertheless, no complete description has been found in books and situations such as different thermal feed conditions, multiple feeds...

Solution-processed polymer films are used in multiple technological applications. The presence of residual solvent in the film, as a consequence of the preparation method, affects the material properties, so films are typically subjected to post-deposition thermal annealing treatments aiming at its elimination. Monitoring the amount of solvent elim...

In this work, the pyrolysis of nicotine under N2 and air atmospheres and in the presence of three mesoporous materials (SBA-15 and two different forms of MCM-41) has been studied by TGA-FTIR. The results obtained show that, in the absence of a catalyst, the thermal evolution of nicotine mainly results in the volatilization of the compound. In an ai...

The analysis has been carried out of the possible theoretical types of ternary systems regarding the distillation boundaries, for systems involving up to three binary azeotropes and one ternary azeotrope. The study reveals that there are some of these theoretical behaviors that classical activity coefficient models such as NRTL cannot predict. The...

Simultaneous correlation of vapour–liquid–liquid equilibrium (VLLE) data is hardly ever attempted in literature with one common set of parameters for all the equilibrium regions present in the systems. It is common practice to obtain different sets of parameters for VLE, LLE and VLLE regions when experimental equilibrium data for ternary systems ar...

The thermal decomposition of chrome tanned leather before and after a soaking treatment with NaOH was studied using thermogravimetric analysis (TGA). The effect of the solution concentration (0.2M and 0.5M) and the soaking time (5min and 15min) was evaluated. TGA experiments at four heating rates (5, 10, 15 and 20°Cmin(-1)) were run in a nitrogen a...

In this study a series of melamine-formaldehyde (MF) microcapsules containing Melaleuca alternifolia oil as natural biocide with different polymer to oil ratio was prepared by the in situ polymerization (O/W) method. The characterization of the microcapsules properties was undertaken by different experimental techniques in order to establish a corr...

URI: http://hdl.handle.net/10045/50110

Two as-synthesized meso- and macro-porous siliceous materials (MPSM), i.e. Al- MCM-41 and SBA-15, were mixed with tobacco in order to study their effect on tobacco smoke chemistry. A reference cigarette, 3R4F and a commercial cigarette, Fortuna, containing different percentages of MPSM were smoked in a smoking machine, and the mainstream smoke was...

Diammonium hydrogen phosphate (DAP) is commonly used as a flavor ingredient of commercial cigarettes. In addition, among its other uses, it is employed to expand the tobacco volume, to manufacture reconstituted tobacco sheet, and to denicotinize tobacco. However, the use of DAP as a cigarette ingredient is a controversial issue. Some authors have s...

The effect of three synthesised mesoporous catalysts (a SBA-15 and two MCM-41) on the smoke of two reference tobaccos (1R5F and 3R4F) has been studied. Mixtures of the catalysts and each tobacco were smoked under the ISO 3388 standard conditions. The gaseous compounds and the particulate matter condensed in the filter tip (TPM-F) and in a trap loca...

In this study 11 commercial roll-your-own (RYO) tobacco brands sold in Spain and the reference tobacco 3R4F have been smoked and several components of the mainstream tobacco smoke have been analyzed. Cigarettes were prepared using commercial tubes, and were smoked under smoking conditions based on the ISO 3308. The gaseous and condensed fractions o...

The effect of two zeolites, HUSY, NaY and a mesoporous synthesized Al-MCM-41 material on the smoke composition of ten commercial cigarettes brands has been studied. Cigarettes were prepared by mixing the tobacco with the three powdered materials, and the smoke obtained under the ISO conditions was analysed. Up to 32 compounds were identified and qu...

URI: http://hdl.handle.net/10045/42101

In this work, the catalytic effect of MCM-41 on the qualitative composition of the gases evolved in the pyrolysis of glycerol, tobacco and tobacco-glycerol mixtures has been studied by TGA/FTIR. The results obtained reflect that the amount of volatile products obtained from tobacco or from tobacco containing mixtures is noticeably decreased if the...

http://hdl.handle.net/10045/53405

In the present work, we provide a systematic analysis about all the streams involved in the zone connecting two consecutive sections for the design of distillation columns with different thermal feed conditions, product extractions and heat additions or withdrawals. This analysis allows a better understanding of what happens on a feed or side draw...

Gasoline coming from refinery fluid catalytic cracking (FCC) unit is a major contributor to the total commercial grade gasoline pool. The contents of the FCC gasoline are primarily paraffins, naphthenes, olefins, aromatics, and undesirables such as sulfur and sulfur containing compounds in low quantities. The proportions of these components in the...

In this work, the evolution with temperature of the qualitative composition of the gases evolved in the pyrolysis of glycerol, tobacco and tobacco-glycerol mixtures has been studied. The pathways for different types of compounds (i.e., water, CO, CO2, carbonylic compounds, alkenyl or alkyl groups containing compounds, alcohols and phenols and aroma...

Microalgae are very effective microorganisms for CO2 capturing and a promising source of lipids for biodiesel as well as other interesting compounds. Many different ways of exploitation of these organisms are being tested. This work presents a review of the state of the art of the research and development of thermochemical conversion of microalgae...

In this work, montmorillonite (Mt) has been organically modified with ethyl hexadecyl dimethyl ammonium (EHDDMA) in 20, 50, 80 and 100% of the nominal exchange capacity (CEC) of the Mt. A full characterization of the organo-montmorillonite (OMt) obtained has been made, including thermal analysis, X-Ray Diffraction, elemental analysis CHN and nitrog...

This study deals with the rheological aspects of poly-vinyl chloride (PVC) plastisol gelation and fusion processes in foamable formulations. Here, such processes are simulated by temperature-programmed experiment (5 K min−1) in which complex viscosity components are continuously recorded. Nineteen samples based on a PVC-VAC (vinyl acetate 95/5) cop...

In this study, a novel kind of hybrid pigment based on nanoclays and dyes was synthesized and characterized. These nanoclay‐based pigments (NCPs) were prepared at the laboratory with sodium montmorillonite nanoclay (NC) and methylene blue (MB). The cation‐exchange capacity of NC exchanged with MB was varied to obtain a wide color gamut. The synthes...

The thermodynamic consistency of almost 90 VLE data series, including isothermal and isobaric conditions for systems of both total and partial miscibility in the liquid phase, has been examined by means of the area and point-to-point tests. In addition, the Gibbs energy of mixing function calculated from these experimental data has been inspected,...

In this work, mixtures of vacuum gas oil and low density polyethylene, a major component of common industrial and consumer household plastics, were pyrolytically co-processed in a fluid catalytic cracking (FCC) riser reactor as a viable alternative for the energy and petrochemical revalorisation of plastic wastes into valuable petrochemical feedsto...

The decomposition of azodicarbonamide, used as foaming agent in PVC—plasticizer (1/1) plastisols was studied by DSC. Nineteen different plasticizers, all belonging to the ester family, two being polymeric (polyadipates), were compared. The temperature of maximum decomposition rate (in anisothermal regime at 5 K min−1 scanning rate), ranges between...

The aim of this study is to investigate the effect of particle size on the non-isothermal pyrolysis of almond shells (AS) and olive stones (OS) and to show possible differences in the composition of the different fractions obtained after milling and sieving. The results obtained from the study of different particle size of AS and OS samples show si...

In this study, a new type of nanopigment, obtained from a nanoclay (NC) and a dye, was synthesized in the laboratory, and these nanopigments were used to color an ethylene vinyl acetate (EVA) copolymer. Several of these nanoclay-based pigments (NCPs) were obtained through variations in the cation exchange capacity (CEC) percentage of the NC exchang...

The solubility, density, refractive index, and viscosity data for the ethylene glycol + CsBr + H2O, 1,2-propanediol + CsBr + H2O, and glycerin + CsBr + H2O ternary systems have been determined at (288.15, 298.15, and 308.15) K. In all cases, the solubility of CsBr in aqueous solutions was decreased significantly due to the presence of polyhydric al...

The foaming of PVC-VA (Poly (Vinyl Chloride-co-Vinyl Acetate)) plastisols is a complex combination of processes involving the simultaneous curing of the paste with the evolution of gases caused by the decomposition of the chemical blowing agent. The extensional viscosity is a fundamental characteristic of the material, responsible for the behavior...

In this work the usefulness of qualitatively studying and drawing three-dimensional temperature–composition diagrams for ternary systems is pointed out to understand and interpret the particular behavior of the liquid–vapour equilibrium of non-ideal ternary systems. Several examples have been used in order to highlight the interest and the possibil...