Teik Thye  (T-T) Lim

Teik Thye (T-T) Lim
Nanyang Technological University | ntu · School of Civil and Environmental Engineering

BEng, MEng (Geo-env Eng), PhD (Env Eng); Full Professor

About

224
Publications
45,552
Reads
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15,596
Citations
Citations since 2016
104 Research Items
11612 Citations
201620172018201920202021202205001,0001,5002,000
201620172018201920202021202205001,0001,5002,000
201620172018201920202021202205001,0001,5002,000
201620172018201920202021202205001,0001,5002,000
Additional affiliations
September 2019 - present
Nanyang Technological University
Position
  • Professor
Description
  • My research areas are advanced oxidation and separation processes for waste stream treatment, environanotechnology, resource recovery, water treatment for disaster reliefs, and chemodynamics of pollutants in environmental systems
January 2000 - present
Nanyang Technological University
Position
  • Professor

Publications

Publications (224)
Article
In this study, catalytic ceramic membrane (CCM) impregnated with uniform and high purity Co-Mn-oxide was fabricated via citrate sol-gel method. It was applied to activate peroxymonosulfate (PMS) for degradation of sulfamethoxazole (SMX). Due to the synergistic effect between the two cations, the Co-Mn bimetallic oxides exhibited significantly highe...
Article
Calcium looping and chemical looping technologies envisage advanced solutions for H2 production. This study compared the H2 and power co-production from biomass sorption enhanced gasification (SEG) and sorption enhanced chemical looping gasification (SECLG) under autothermal conditions with thermodynamic simulation. The thermal self-sufficiency of...
Article
Impurities such as alkali metals (NaCl and KCl) and hydrogen chloride can limit downstream syngas utilization. In this study, a highly-active sorbent based on alumina containing active components for alkali metals and HCl sorption was synthesized for simultaneous removal of alkali metals and HCl from syngas at high temperatures of 750–850 °C in a r...
Article
The influence of alkali earth metals (AEMs, including Ca, Sr and Ba) doping on the performance of CuO/Al2O3 oxygen carrier (OC) in chemical looping combustion (CLC) was investigated. The OCs using solid-state synthesis method were evaluated in a fluidized bed reactor using municipal solid waste (MSW) syngas as fuel for 50 redox cycles. It was found...
Article
Ni catalysts are used widely in tar reforming for syngas purification. This study investigates the aim of the reduction stage toward Ni catalysts during tar reforming in the presence of syngas impurities. A NiAl2O4 catalyst was used for the reforming of a mixture of tar model compounds (naphthalene, toluene, and styrene) in simulated syngas contain...
Article
Catalytic reforming is a promising technology for the removal of tar from syngas. However, due to the presence of other impurities such as H2S, HCl, HBr, siloxanes, alkali metals, and NH3, the lifetime, activity, and stability of commonly used Ni-based catalysts is limited. This review investigates the recent findings related to poisoning effects o...
Article
The strategy of thermochemical conversion of plastic waste into carbon nanotubes (CNTs) and hydrogen makes both environmental and economic sense. Exploring high-performance catalysts is an essential prerequisite of converting plastics by pyrolysis and in-line catalysis technology. To improve the catalytic performance of Ni–Mg system, high-valency a...
Article
Mg-Al-supported composites of CuO Oxygen carrier (OC) and Ba/Sr sorbent synthesized by mechanical mixing were used for three-stage process of MSW syngas chemical looping Combustion and HCl adsorption (CLCA). The syngas combustion and HCl adsorption efficiencies as well as thermal behavior of the composites were investigated. It was found that the c...
Article
Solid oxide fuel cell (SOFC) recently emerges as a promising technology for distributed power generation with high energy efficiency. While H2 production and delivery are still the hurdles, diesel can be accessed easily. Thus, it would be of great advantage to generate electricity through an SOFC-based power generation system fueled with diesel. In...
Article
Fe2O3–Al2O3 catalysts applied for conversion of polyolefin plastic waste into multi-walled carbon nanotubes (MWCNTs) and H2 are typically produced by impregnation, co-precipitation or sol-gel synthesis at atmospheric pressure and temperatures below 100 °C. This study utilized hydrothermal conditions and established the role of precipitating agents...
Article
A 3D flower-like bismuth oxybromide (BiOBr) was synthesized by a facile one-pot chemical precipitation method and its potential on sulfamethoxazole (SMX) degradation via peroxymonosulfate (PMS) activation was investigated for the first time. The physic-chemical properties of BiOBr were characterized by field emission scanning electron microscope (F...
Article
Catalytic activation of peroxymonosulfate (PMS) and peroxydisulfate (PDS) (or collectively known as persulfate, PS) using carbocatalyst is increasingly gaining attention as a promising technology for sustainable recalcitrant pollutant removal in water. Single heteroatom doping using either N, S, B or P is widely used to enhance the performance of t...
Article
Thermochemical conversion of plastic wastes into carbon nanotubes (CNTs) is a promising management option to eliminate their hazardous effect. To boost the efficiency, tuning of bimetallic nanoparticles as catalyst is an effective approach. For example, the yields and morphologies of CNTs strongly depend on the catalyst design and reaction conditio...
Article
This work evaluated the application of catalytic ceramic membrane (Me-CCM, Me = Ce or Co) functionalized with Me-doped TiOx catalytic filtration layer and MeOx nanocatalysts impregnated substrate in the Hybrid Oxidation Separation Technology (HOST) for recalcitrant micropollutant (MP) degradation. The architectural design of the Me-CCM was aimed to...
Article
In this study, mixed-addenda polyoxometalates (POMs) were synthesized by self-assembly process accompanied by the introduction of dopants to boost the electrochemical water oxidation performance. A lower onset potential and higher current density were achieved by mixed-addenda POMs compared to pristine POMs suggesting that the former were more acti...
Article
Improving the efficiencies of organic compound degradations by catalytic materials is a challenging materials research field. In our research, we successfully synthesized cobalt-based polyoxometalates (CoV-POMs) via a simple crystallization-driven self-assembly method. The incorporation of the newly synthesized CoV-POMs into peroxymonosulphate (PMS...
Article
Mixtures of immiscible liquids are commonly found in the scenarios of environmental protection and many industrial applications. Compared to widely explored water–oil mixtures, small differences in the surface energy of organic liquids, especially for those in multiphase mixtures, make their separation a formidable challenge. Here, a family of vers...
Article
Iron ore (IO) modified with alkaline earth metal (AEM) oxides were developed as oxygen carriers (OCs) for the chemical looping combustion (CLC) of simulated municipal solid waste (MSW) syngas to simultaneously reduce the H2S emission. The AEM oxides, especially BaO, were found to improve the CLC performance of IO greatly due to the formation of AEM...
Article
For high temperature purification of HCl-containing syngas, chemical looping combustion-adsorption (CLCA) was developed using Ba-, Sr- and Ca-coated iron ore (IO) as bifunctional oxygen carrier-HCl sorbent (OCS) composites. The behavior of OCS at fuel reaction (FR), air reaction (AR) and sorbent regeneration (SR) stages was studied. It was found th...
Article
An energy and cost-effective method was reported for bismuth oxybromide (BiOBr) preparation, and its versatile applications were investigated from the well-established photocatalysis to chemical oxidation. The performance was evaluated by bisphenol A (BPA) degradation in both photocatalysis and chemical oxidation via peroxymonosulfate (PMS) activat...
Article
A series of Ce/TiOx-functionalized catalytic ceramic membranes (CeTi-CeCCMs) were fabricated via citrate sol-gel assisted wet impregnation followed by acid-hydrolysed sol-gel dip coating method. The effect of Ce-dopant and block-copolymer P-123 on the formation of Ce-doped TiOx was investigated and optimized to fabricate a uniform Ce-doped TiOx lay...
Article
The simultaneous high-temperature HCl removal and chemical looping combustion (CLC) of syngas over barium-decorated oxygen carriers (OCs) was investigated. An iron ore was coated with a layer of sorbent (5 wt%) containing Ba and Al compounds (molar ratios Al:Ba = 0.5, 2.0, 4.5, 8.0, 12) and used for model syngas combustion at 800 °C. It was found t...
Article
The redox performances of iron ore (IO) modified with different alkaline earth metals (AEM) as oxygen carriers (OCs) were evaluated with thermogravimetric analysis (TGA) and fluidized bed reactor experiments for the chemical looping combustion (CLC) of municipal solid waste (MSW) derived syngas. AEM oxides (BaO, CaO, and MgO) and AEM aluminates (Ba...
Article
The synergetic effect in using witherite (BaCO3) and iron ore (IO) for simultaneous dechlorination and chemical looping combustion (CLC) of municipal solid waste (MSW) derived syngas was studied on a bench-scale fluidized bed reactor at the temperature range of 800–900 °C. For comparison, limestone a widely used HCl sorbent was also tested. It was...
Article
Full-text available
Chemical looping combustion (CLC), as an advanced combustion technology, has attracted much attention because of its applicability to a variety of fuels and its ability to achieve inherent carbon capture. However, CLC of municipal solid waste (MSW) has been seldom reported. In this study, we investigated the CLC of simulated MSW-derived syngas usin...
Article
The variation of metal-support interaction (MSI) plays a key role in the synthesis of carbon nanotubes (CNTs) based on chemical vapor deposition process. This work concentrates on weakening the interaction of Fe-La in an A-site-deficient perovskite (La0.8FeO3-δ) via Ni partial substitution. After reductive treatment, the catalysts were employed for...
Article
Nickel catalysts suffer from the loss of tar reforming activity due to poisoning by syngas impurities. The strategy of increasing activity of catalysts through selection of suitable organic precipitants for hydrothermal synthesis was investigated. Catalysts were synthesized from nickel and aluminum nitrates using urea, N,N’-dimethylformamide, N-met...
Article
Hydrogen bromide is an emerging impurity of syngas formed during gasification of electronic and municipal solid waste. The influence of HBr on catalytic activity and deactivation of various Ni-based tar reforming catalysts was investigated. The data demonstrate the detrimental effect on catalytic properties (1) occurs at HBr concentrations above 50...
Article
Lyophobic membrane has the potential to separate immiscible liquids. However, the multistep fabrication and limited option of materials have created major challenges for their practical application. Here, a strategy to fabricate superlyophobic materials is presented by using polydopamine (PDA) as an intermediate coating. The results demonstrate tha...
Article
Membrane filtration is a promising technology for the separation of organic immiscible liquids. Surface topography has direct impact on the wettability of membranes, and it remains largely unexplored. Here, we introduce on-demand liquid separation by coating porous graphene/metal-organic frameworks (MOFs) composites with tunable wettability on poro...
Article
Tar, one of the most challenging impurities in the syngas generated from the gasification of municipal solid waste (MSW), can severely restrict its applicability in advanced utilization systems such as solid oxide fuel cells, gas engines and combined cycle gas turbines. Due to the complexity in sampling and analysis of tar, very limited studies hav...
Article
A series of supported catalysts consisting of CuO (2-28% w/w Cu) loaded on hexagonal boron nitride (h-BN) was fabricated via a facile impregnation-calcination method. The characteristics of the as-prepared catalysts were examined using FESEM, XRD, XPS and porosimeter indicating that the catalysts consist of microparticles morphology with BET specif...
Article
H 2 S is a common impurity in the syngas derived from municipal solid waste gasification. For power generation using advanced technologies, such as gas engines/turbines or solid oxide fuel cells, reducing the H 2 S content to acceptable levels is required. This work investigated the desulfurization performance of bimetallic particles by adding diff...
Article
Catalytic wet air oxidation (CWAO), one of the best-known methods for water treatment, has been intensely investigated for dyes degradation. However, the extreme operation conditions as well as the recovery of suspended catalyst are economically unattractive. In the current work, a novel Mo-based nanocrystal decorated ceramic membrane (Mo/Al2O3) ha...
Article
The process of pyrolysis and in-line catalysis was employed for converting plastics into value-added carbon nanotubes (CNTs). The metallic nickel catalysts Ni/X (X = La, Mg, Sr) were prepared through in situ growth from parent X–Ni oxides under reductive conditions and used for the catalytic synthesis of CNTs. The results showed that the activities...
Article
Dual‐superlyophobic membranes that exhibit underwater superoleophobicity and underoil superhydrophobicity concurrently have gained considerable attention for oil/water separation. To effectively treat oily wastewater, consistent efforts have been made to develop fast and simple methodologies with low cost, environmentally friendly materials. Here,...
Chapter
Various advanced technologies have been suggested to remove the biorefractive and recalcitrant cytostatic drugs (CSDs) in aquatic environment, such as membrane biofiltration, electrolysis, ozonation, and UV-based technologies. This chapter focuses on the photodegradation of CSDs in low-pressure UV photoreactor through direct and indirect pathways....
Article
Previous studies have reported that metal-doped graphitic carbon nitride (g-C3N4) materials can activate peroxymonosulfate (PMS) to destruct organic pollutants. Herein, we interestingly found that pure g-C3N4 materials synthesized via a facile calcination protocol without any metal doping could serve as the efficient PMS activator for degrading bis...
Article
Catalytic activation of peroxymonosulfate (PMS) to generate radicals has received considerable and increasing attention in the environmental catalysis for treatment of recalcitrant pollutants. In the current study, a series of highly porous, cobalt-loaded activated carbon nanofibers (Co/CNFs) were prepared by one-pot electrospinning followed by the...
Article
The production of synthetic natural gas (SNG) from syngas derived through waste gasification is an attractive option for converting waste into useful fuel. However, the carbon conversion ratio of traditional SNG production is usually below 50% due to the limited amount of H 2 , while the excess CO 2 needs to be removed. To realize a higher utilizat...
Article
Nitrogen-doped chitosan-derived carbon nanosheets with hierarchically porous structure were synthesized via a facile pyrolysis treatment of chitosan/urea/NaHCO3 mixture (denoted as CNU). The contents of reactive functionalities, graphitization degree and porous structure of CNU can be effectively tailored by pyrolysis temperature (Tp). The outstand...
Article
Pyrolysis of sewage sludge in the presence of humic acid (HA), CaO and kaolin was investigated in order to examine the effects of organic and inorganic constituents on the product properties. The presence of HA in the sludge increased the yields of H2 and CO compared to that from the raw sludge pyrolysis. Water evolved during decomposition of kaoli...
Article
In this work, the transformation of sulfamethoxazole (SMX) by peroxydisulfate (PDS) activated with one multi-walled carbon nanotube (CNT) via a nonradical pathway was examined, and the underlying reaction mechanism was explicated. The nonradical PDS/CNT process exhibited considerable reactivity toward SMX, and the oxidation of SMX was enhanced by t...
Article
The purpose of this study was to determine the mechanisms in heavy metals immobilisation during pyrolysis of industrial sludge (IS). Pyrolysis was conducted in a fixed-bed unit at the temperature range between 400 and 800 °C. Conventional and advanced analytical techniques were employed to assess the influencing parameters on the transformation of...
Article
Nickel-based catalysts were synthesized using gasification slag as an abundant and inexpensive material with high mechanical strength. The synthesis procedure comprised of etching of gasification slag with hydrofluoric acid, aluminum hydroxide addition, impregnation with Ni and calcination. The naphthalene reforming activity was tested at 850 °C an...
Article
In this study, N-doped porous carbons (N–doped PCs) were prepared from various biowastes by thermal annealing method under inert atmosphere and compared. Due to the differences in the textural characteristics and %w/w inorganic content, the choice of biowaste influenced the intrinsic (extent of N doping, % graphitic N) and extrinsic (specific surfa...
Article
This study investigated the degradation of three micropollutants (MPs), namely bisphenol A (BPA), benzotriazole (BTZ) and clofibric acid (CA) by a novel hybrid catalytic ozonation-membrane filtration process. The catalytic ceramic membranes (CCMs) were fabricated via citrate sol-gel assisted wet impregnation method. The surface morphologies and ele...
Article
A novel polyacrylonitrile (PAN)-induced carbon membrane with in-situ encapsulated cobalt crystal was developed via a one-step carbonization method and applied for peroxymonosulfate (PMS) activation. The dual-function of cobalt in tuning carbon formation and activating PMS was explored. The growth mechanism of the functionalized membrane was investi...
Article
Nitrogen and boron-co-doped graphene was synthesized through two-step thermal annealing (2sNBG) which was employed as a PMS activator to degrade sulfacetamide (SAM). The concentration of the main reactive functionalities (pyridinic N and substitutional B (BC3)) as well as catalytic activity of 2sNBGs were delicately maneuvered through tuning the th...
Article
A facile metal–organic framework (MOF)‐mediated interfacial polymerization (IP) method is developed to prepare a polyamide (PA) layer directly on the ceramic substrate for nanofiltration. MOF is introduced to connect ceramic substrate and PA layer via chemical bonding, resulting in a robust separation layer. The optimization of IP can be controlled...
Article
In this study, a pore-functionalized ceramic membrane with isotropically impregnated cobalt oxide (CoCM) was prepared via an in-situ self-sacrificed template method and applied for sulfamethoxazole (SMX) degradation by peroxymonosulfate (PMS) activation under a dead-end membrane filtration mode. The physical and chemical properties of the membranes...
Article
Full-text available
Gasification of municipal solid waste (MSW) with subsequent utilization of syngas in gas engines/turbines and solid oxide fuel cells can substantially increase the power generation of waste-to-energy facilities and optimize the utilization of wastes as a sustainable energy resources. However, purification of syngas to remove multiple impurities suc...
Article
A novel, cost-effective and real-time process monitoring and control system was developed to maintain stable operation of waste-to-energy gasification process. It comprised a feedback loop control that utilized the differential temperatures of the oxidation and reduction zones in the gasifier to determine the regional heat-flow (endothermic or exot...
Article
Full-text available
In this study, a Bi2Fe4O9 catalyst with nanoplate morphology was fabricated using a facile hydrothermal method. It was used as a catalyst to activate peroxymonosulfate (PMS) for aqueous sulfamethoxazole (SMX) removal. A comprehensive performance evaluation of the Bi2Fe4O9/PMS system was conducted by investigating the effects of pH, PMS dosage, cata...
Article
Full-text available
H 2 S and HCl are common impurities in raw syngas produced during gasification of biomass and municipal solid waste. The purpose of this study was to investigate the poisoning effect of H 2 S and HCl on synthesized and commercial catalysts during steam reforming of naphthalene. Four synthesized catalysts with different loadings of Ni and Fe on alum...
Article
In this work, nano-bimetallic Co/Fe oxides with different stoichiometric Co/Fe ratios were prepared using a novel one-step solution combustion method. The nano-bimetallic Co/Fe oxides were used for sulfamethoxazole (SMX) degradation via peroxymonosulfate (PMS) activation. The stoichiometric efficiencies of the as-prepared nano-bimetallic catalysts...
Article
A comprehensive study was conducted to evaluate the fuel properties of the char produced from pyrolysis of municipal sludge (MS) and industrial sludge (IS) at different pyrolysis temperatures (500–700 °C). A detailed characterisation of the char was performed to investigate the impact of the decomposition and the accumulation of organic and inorgan...
Article
Tar compounds produced during gasification of municipal solid waste (MSW) hinder downstream utilization of syngas. This study investigated the effects of operating conditions (temperature, equivalence air ratio (ER) and MSW moisture content) during gasification using air on tar emissions. Tar was quantified by gravimetric and GC-MS methods, denoted...
Article
Recently, redox oxidation technology based on peroxydisulfate (PDS) activation by heterogeneous catalyst has shown promising potential for environmental decontamination. The heterogeneous catalysts employed for PDS activation can be classified as metal- and carbon-based catalysts. Currently, the sustainability of metal-based catalysts as PDS activa...
Article
The Zn-Al mixed metal oxide (ZnAl-MMO) with a plate-like structure was derived from Zn-Al layered double hydroxide. The ZnAl-MMO with a Zn/Al molar ratio of 3:1 exhibits superior absorption ability for H2S in a simulated coal gas at 600 ℃ due to the special structure of the ZnAl-MMO. Besides ZnS, elemental sulfur is also produced during the desulfu...
Article
Emerging technologies for water disinfection is being developed to reduce waterborne disease efficiently. Herein, we report a novel bactericidal technology incorporating 0D-2D-3D nanostructured rGO-Ag/Bi2Fe4O9 (BFOA-G) composites which exhibited ultra-effective disinfection efficacies towards Gram-negative E. coli and P. aeruginosa, and Gram-positi...
Article
A new approach (microwave-hydrothermal plus oxidation) was proposed for the preparation of the Zn-based sorbents supported on the ordered mesoporous Si-based material. The hydrothermal synthesis and oxidation conditions of the sorbent precursor (ZnS/MCM41 mesophase) with Zn(AC)2 and thioacetamide (TAA) as the Zn and S sources, respectively, were op...
Article
A series of Ni-Zn-based nanocomposites with various Ni:Zn mol ratios was prepared using a facile hydrothermal-calcination method. The Ni-Zn-based nanocomposites were characterized using XRD, FESEM, EDX and N 2 adsorption, indicating that all the Ni-Zn-based nanocomposites consisted of hierarchical nanostructure. The Ni-Zn-based nanocomposites were...
Article
Thermal processing of sewage sludge (SS) has received increasing attention in recent years. Thermal processes valorise the carbon rich organic fraction of SS, while effectively reducing SS volume. However, the fate and distribution of heavy metals (HMs) during thermal processing of SS is an important issue to address because it has impact on the ge...
Article
A facile one-step assembly method was developed for the preparation of metal-organics @Bi2O3 composites for photocatalysis. Two kinds of metal-organics (Ti-bdc and Cu-btc)@Bi2O3 composites were synthesized via the coordination of btc3-/bdc2- and metal ions (Ti4+/Cu2+) as well as OH on the surface of Bi2O3. Compared with pure Bi2O3, Ti-bdc@Bi2O3 sho...
Article
In this study, a novel CoFe2O4 nanocatalyst impregnated Al2O3 ceramic membrane was prepared via a urea-assisted one-step combustion method. The catalytic membrane was characterized by field emission scanning electron microscopy (FESEM) with energy dispersive X-Ray analysis (EDX) and applied for the catalytic degradation of sulfamethoxazole (SMX) vi...
Article
Hydrogen chloride is commonly present in syngas produced from municipal solid waste and biomass gasification. The influence of HCl on the activity of nickel-based catalysts during catalytic naphthalene reforming was investigated. Two synthesized