Review
Engineering, Environmental
Yeol-Lim Lee, Kyoung-Jin Kim, Ga-Ram Hong, Hyun-Seog Roh
Summary: This review focuses on the reaction conditions and catalysts for water-gas shift reaction (WGSR) in various feed gases, including natural gas, biomass, municipal solid waste, and coal-derived synthesis gas. The performance of catalysts, including capacity, temperature, feed gas composition, and steam-to-carbon ratio, are compared to understand the development progress. The insights from this study provide valuable information for target-oriented WGSR in different feed gases.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Energy & Fuels
Mokhtar Akhond Babatabar, Majid Saidi
Summary: A comprehensive model was developed to predict and optimize hydrogen production through the integrated configuration of steam gasification and water-gas shift reaction of biomass, using ASPEN plus software and sensitivity analysis techniques. The study revealed that the highest hydrogen concentration was achieved with the highest steam to biomass ratio in the gasifier and WGS reactor, as well as the lowest WGS reaction temperature, while there was an optimum gasification temperature.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Chemistry, Physical
Minghui Tan, Sha Tian, Tao Zhang, Kangzhou Wang, Liwei Xiao, Jiaming Liang, Qingxiang Ma, Guohui Yang, Noritatsu Tsubaki, Yisheng Tan
Summary: By functionalizing the surface of a Cu/ZnO catalyst with stearic acid, the hydrophobicity of the catalyst is significantly enhanced while maintaining its structure and catalytic performance almost unchanged. The hydrophobic Cu/ZnO catalyst shows positive inhibitory effects on the water-gas shift reaction in one-step DME synthesis. The improved catalytic performance demonstrates the importance of surface hydrophobicity in heterogeneous catalysts.
Article
Engineering, Chemical
Shuzhuang Sun, Chen Zhang, Shaoliang Guan, Shaojun Xu, Paul T. Williams, Chunfei Wu
Summary: Integrated CO2 capture and utilisation (ICCU) is a promising strategy for restricting carbon emissions and achieving carbon neutrality. This study investigated a series of Ni/support-CaO BCMs for the ICCU-RWGS process and found that Ni/CeO2-CaO exhibited the best performance with high CO2 conversion and selectivity.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Energy & Fuels
Xianyao Yan, Yingjie Li, Chunxiao Zhang, Yuzhuo Wang, Jianli Zhao, Zeyan Wang
Summary: The study used density functional theory (DFT) analysis to investigate the water gas shift reaction on the CaO surface and found that it is more likely to proceed along the redox-a pathway. The CaO surface facilitates the spontaneous dissociation of H2O, which is the rate-limiting step of the reaction, and promotes the generation of CO2 with reduced energy barrier. However, the presence of CO32- on the surface may hinder the desorption of CO2 and reduce the enhancement of CaO on the reaction.
Article
Green & Sustainable Science & Technology
Alessandro Cavalli, Pradeep Chundru, Thomas Brunner, Ingwald Obernberger, Ilaria Mirabelli, Robert Makkus, Purushothaman Vellayani Aravind
Summary: This study focuses on high temperature biosyngas cleaning, exploring the catalytic activity of sorbents in the process. The results show that sorbents have significant impact on the water gas shift reaction and H2S removal, but are inactive towards the methanation reaction.
Review
Chemistry, Physical
Ali M. Bahmanpour, Matteo Signorile, Oliver Kroecher
Summary: The recent progress in catalyst design and understanding of the reaction mechanism for the RWGS reaction has led to the introduction of new promising catalysts, particularly in terms of catalyst stability at high temperatures. However, there is still room for improvement in this area for the conversion of CO2 to fuels.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Chemistry, Physical
Ana Rita Querido, Liliana P. L. Goncalves, Yury V. V. Kolen'ko, M. Fernando R. Pereira, O. Salome G. P. Soares
Summary: The reverse water-gas shift reaction (RWGS) is crucial for converting CO2 to CO, which is used for the production of various chemicals and synthetic fuels. In this study, Cu-based catalysts supported on pristine CNTs and composites of pristine and functionalized CNTs : ZnO were prepared to enhance the efficiency of RWGS catalysts. The presence of ZnO in the catalyst structure proved to be beneficial, resulting in a higher CO2 conversion and CO yield compared to catalysts supported on pristine CNTs. Additionally, the N-doping of CNTs further improved the CO2 conversion and CO yield, with stability observed for at least 93 hours.
CATALYSIS SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Physical
Ning Liu, Bili Chen, Kunlong Liu, Ruixuan Qin, Jingjuan Wang, Yazhou Zhang, Qinghua Zhang, Lin Gu, Pengxin Liu, Kecheng Cao, Pu Yan, Gang Fu, Nanfeng Zheng
Summary: Modifying the surface of nickel with silica significantly enhances its catalytic performance for the water-gas shift reaction (WGSR). This study provides valuable insights into the catalytic mechanism between nickel and silica and contributes to the development of high-performance nickel-based catalysts.
Article
Multidisciplinary Sciences
Shuzhuang Sun, Chen Zhang, Sining Chen, Xiaotong Zhao, Yuanyuan Wang, Shaojun Xu, Chunfei Wu
Summary: Achieving carbon neutrality is crucial, and integrated CO2 capture and utilization (ICCU) is an effective process for direct CO2 utilization. CeO2-CaO material shows superior catalytic performance in ICCU, with significantly improved CO2 conversion and selectivity. It also exhibits excellent cycle stability, making it a sustainable and efficient option for CO2 conversion.
ROYAL SOCIETY OPEN SCIENCE
(2023)
Article
Chemistry, Physical
Yuxin Tong, Lizhu Song, Shangbo Ning, Shuxin Ouyang, Jinhua Ye
Summary: This study introduces a novel catalyst design with semiconductor-bridging active sites for photothermal WGS reaction, achieving efficient CO conversion at low temperatures. By injecting photocarriers from CeO2 into active sites, a significant reduction in activation energy enables the reaction to occur at 225 degrees C, delivering high CO conversion and meeting industrial standards. These findings offer a new approach to enhance catalytic performance through semiconductor-coupled photothermal catalysts.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Chemistry, Physical
Joyjit Chattoraj, Brahim Hamadicharef, Yusuf Nizar Aris Syadzali, Gerren Owen Limantara, Yingzhi Zeng, Chee Kok Poh, Luwei Chen, Teck Leong Tan
Summary: This article reports the construction of a database on water-gas shift reaction using noble metal catalysts for fuel cell applications, and evaluates the effects of catalytic compositions and reaction conditions on carbon monoxide conversion using a machine learning approach with Shapley feature importance methodology. The proposed theory-guided machine learning model outperforms other state-of-the-art models and offers promising possibilities for finding suitable catalysts.
Article
Engineering, Environmental
Yuzhuo Wang, Yingjie Li, Liguo Yang, Xiaoxu Fan, Leizhe Chu
Summary: In this study, the mechanisms of the sorption-enhanced water-gas shift (SE-WGS) reaction catalyzed by Ni-doped CaO (Ni-CaO) were investigated using density functional theory (DFT). Results showed that Ni promoted higher stability and reactivity in the Ni-CaO model compared to CaO, leading to improved CO conversion and H-2 productivity.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2022)
Article
Engineering, Environmental
Ruiying Li, Xiuhui Zheng, Fei Wang, Hao Yan, Xin Zhou, Yongxiao Tuo, Yibin Liu, Xiang Feng, Xiaobo Chen, De Chen, Chaohe Yang
Summary: The effect of surface Mo and C coordination on the low-temperature WGS activity of Pt/alpha-MoC1-x catalysts was investigated. The study found that a decrease in the Mo:C ratio led to a weakened electron transfer ability and decreased catalytic activity. The 0.4% Pt/alpha-MoC1-x -50 catalyst exhibited superior hydrogen production activity and low apparent activation energy at low temperatures.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Chemical
Soheil Saffary, Mansoureh Rafiee, Mohammadreza Saeidi, M. Erdem Gunay, Sohrab Zendehboudi
Summary: A machine learning approach is introduced to predict the ranges of Cu(SA) in three classes based on catalyst preparation factors. Three models, including random forest, support vector machine, and multilayer perceptron artificial neural network classifiers, are developed and optimized. The random forest model shows the best performance with 90% cross-validation accuracy and 94.7% test data prediction accuracy. The effects of synthesis factors on Cu(SA) are investigated using SHAP analysis, and it is concluded that Cu/Zn ratio has the greatest influence. The optimum synthesis conditions for high Cu(SA) are also discovered, which is of great importance for synthesis of Cu/ZnO/Al2O3 catalysts with high catalytic activity.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2023)
Article
Energy & Fuels
R. S. R. M. Hafriz, N. A. Arifin, A. Salmiaton, R. Yunus, Y. H. Taufiq-Yap, N. M. Saifuddin, A. H. Shamsuddin
Summary: In this study, the multi-objective optimization of deoxygenation of waste cooking oil to green fuel was investigated using RSM and CCD. The results showed that the product oil meets the requirements of green diesel fuel and biofuel standards, and the RSM can adequately predict the reaction products.
Article
Chemistry, Analytical
I. Nur Azreena, H. L. N. Lau, N. Asikin-Mijan, M. A. Hassan, S. Mohd Izham, M. Safa Gamal, Wan Nor Adira Wan Khalit, Mahashanon Arumugam, E. Kennedy, M. Stockenhuber, Y. H. Taufiq-Yap
Summary: In this study, a series of La-HZSM5 catalysts were prepared and investigated for the production of premium quality diesel fuel via hydrodeoxygenation of oleic acid. The La((10))HZSM5((90)) catalyst showed superior activity in producing high quality diesel, attributed to its sufficient weak and medium acid sites as well as mesoporous structure. Vacuum distillation was found to be complementary for producing high quality diesel fractions. The reusability of the La((10))HZSM5((90)) catalyst was also demonstrated.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2022)
Review
Green & Sustainable Science & Technology
Siow Hwa Teo, Chi Huey Ng, Aminul Islam, G. Abdulkareem-Alsultan, Collin G. Joseph, Jidon Janaun, Yun Hin Taufiq-Yap, Shahjalal Khandaker, Gazi Jahirul Islam, Hussein Znad, Md Rabiul Awual
Summary: Textile dye is a significant water pollutant worldwide, especially in developing countries where dumping textile effluent is common. Recycling wastewater is an important option to reduce environmental pollution, and adsorption is a promising method for treating dye-contaminated water. This review critically assesses various adsorbents for dye removal, focusing on efficient adsorbents and cutting-edge processes.
JOURNAL OF CLEANER PRODUCTION
(2022)
Review
Chemistry, Multidisciplinary
Collin Glen Joseph, Yun Hin Taufiq-Yap, Nur Ammarah Affandi, Janice Lay Hui Nga, Veena Vijayan
Summary: Detergents are emerging contaminants in water that require immediate attention. This paper reviews the research on photocatalytic degradation of detergent contaminated wastewater and the parameters that affect the semiconductor's photocatalytic activity.
KOREAN JOURNAL OF CHEMICAL ENGINEERING
(2022)
Article
Green & Sustainable Science & Technology
Noor Azira Abdul Razak, Nurul-Asikin Mijan, Yun Hin Taufiq-Yap, Darfizzi Derawi
Summary: This study successfully produced green diesel from domestic waste cooking oil using a nickel-cobalt/organosilane-SBA-15 catalyst via hydrogen-free and solventless deoxygenation. The functionalization process increased the catalyst's surface area and acidity, resulting in excellent catalytic activity and diesel selectivity during the deoxygenation reaction. The catalyst also maintained its selectivity after multiple cycles of use.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Green & Sustainable Science & Technology
Siow Hwa Teo, Aminul Islam, Nasar Mansir, Mohd Razali Shamsuddin, Collin G. Joseph, Motonobu Goto, Yun Hin Taufiq-Yap
Summary: Bi-metallic integrated Cex-Ca1-xO catalysts were synthesized through a homogeneous co-precipitation route for transesterification, showing excellent catalytic performance and stability. The catalyst exhibited optimal reactivity and biodiesel yield at specific Ce:Ca atomic ratios.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2022)
Review
Materials Science, Multidisciplinary
Aminul Islam, Siow Hwa Teo, Chi Huey Ng, Yun Hin Taufiq-Yap, Shean Yaw Thomas Choong, Md. Rabiul Awual
Summary: This article discusses the interest in developing catalytic desulfurization and denitrification to remove toxic or harmful gases before atmospheric emission. A review of new and advanced SOx/NOx mitigation techniques is provided, offering insights into the key features of this field.
PROGRESS IN MATERIALS SCIENCE
(2023)
Article
Chemistry, Physical
Mohammed Yousuf Albalushi, G. Abdulkreem-Alsultan, N. Asikin-Mijan, Mohd Izham bin Saiman, Yen Ping Tan, Y. H. Taufiq-Yap
Summary: A novel heterogeneous catalyst composite (CuS-FeS/SiO2) derived from rice husk silica was successfully applied to the conversion of palm fatty acid distillate to biodiesel, achieving high efficiency. The impact of independent variables on the esterification reaction was evaluated, and the optimal parameters were obtained. The catalyst showed relatively high stability and could be reused multiple times.
Article
Energy & Fuels
Fatma S. Hafez, Bahaaeddin Sa'di, M. Safa-Gamal, Y. H. Taufiq-Yap, Moath Alrifaey, Mehdi Seyedmahmoudian, Alex Stojcevski, Ben Horan, Saad Mekhilef
Summary: This article provides a systematic review of best practices in targeting energy efficiency as a roadmap for carbon mitigation, limiting energy use, improving buildings' energy performance, and reducing energy consumption. It identifies challenges, motivations, recommendations, and pathways for future work, while also discussing methodological aspects for future researchers.
ENERGY STRATEGY REVIEWS
(2023)
Article
Chemistry, Applied
Azizul Hakim Lahuri, Afidah Abdul Rahim, Norazzizi Nordin, Rohana Adnan, Nur Farhana Jaafar, Yun Hin Taufiq-Yap
Summary: Activated carbon treated with KMnO4 and impregnated with iron oxide showed the highest adsorption capacity of 108.60 mg/g. The CO2 adsorption isotherm at 25 °C fitted best with the Freundlich model, indicating multilayer adsorption on a heterogeneous surface. The optimum adsorption temperature was found to be 30 °C, and the adsorption followed a pseudo-second-order kinetic with an activation energy of 39.8 kJ/mol. The slight reduction in adsorption capacity after four cycles demonstrated practical efficiency in CO2 capture.
Article
Biochemistry & Molecular Biology
Gopalakrishnan Sasikumar, Annadurai Subramani, Ramalingam Tamilarasan, Punniyamurthy Rajesh, Ponnusamy Sasikumar, Salim Albukhaty, Mustafa K. A. Mohammed, Subramani Karthikeyan, Zaidon T. Al-aqbi, Faris A. J. Al-Doghachi, Yun Hin Taufiq-Yap
Summary: A series of ternary metal complexes (Co(II), Ni(II), Cu(II), and Zn(II)) were synthesized and characterized by elemental analysis and spectroscopic methods. These complexes were synthesized from metal salts with Schiff's-base-containing amino acids, salicylaldehyde derivatives, and heterocyclic bases, and showed promising pharmacological properties. The complexes exhibited a distorted, square pyramidal geometry around metal ions and their molecular structures were optimized by DFT calculations. The complexes were further investigated for their electrochemical behavior, catalytic properties, antibacterial activity, cytotoxic effects, and anticancer applications.
Article
Multidisciplinary Sciences
Ramalingam Tamilarasan, Annadurai Subramani, G. Sasikumar, Pandurangan Ganapathi, S. Karthikeyan, Sasikumar Ponnusamy, Salim Albukhaty, Mustafa K. A. Mohammed, Zaidon T. Al-aqbi, Faris A. J. Al-Doghachi, Duha S. Ahmed, Yun Hin Taufiq-Yap
Summary: In this study, water-soluble substituted trimeric triaryl pyridinium cations with various inorganic counter anions were successfully synthesized using a solvent-free method. Compared to conventional and silica-supported Muffle furnace methods, the solvent-free synthesis method offers advantages such as non-toxicity, quicker reaction times, ease of workup, and higher yields. Trimeric substituted pyridinium salts exhibit excellent catalytic activity for the preparation of Gem-bisamide derivatives. The molecular docking results showed that benzyl/4-nitrobenzyl substituted triaryl pyridinium salt compounds can strongly interact with VEGFR-2 kinase and control its activity in cancer treatment and prevention.
SCIENTIFIC REPORTS
(2023)
Review
Environmental Sciences
Chi Huey Ng, Mohd Aizzan Mistoh, Siow Hwa Teo, Andrea Galassi, Azreen Ibrahim, Coswald Stephen Sipaut, Jurry Foo, Jeffrey Seay, Yun Hin Taufiq-Yap, Jidon Janaun
Summary: Plastic pollution is a pressing environmental issue that has caused severe and irreversible impacts on marine life, ecosystems, and the environment due to the lack of effective waste management systems. Limited resources and infrastructure in Southeast Asia pose constant challenges to waste management. This study aims to examine the plastic situation in Southeast Asia, understand the issues with existing waste management systems, and review the efforts made by governments, private sectors, social organizations, stakeholders, and consumers to combat plastic pollution.
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Amadi Fidelis Uchenna, Ramli Irmawati, Yun Hin Taufiq-Yap, Saiman Mohd Izham, Usman Idris Nda-Umar
Summary: A biomass derived carbon supported yttrium oxide catalyst (Y2O3/PKS-T700) was synthesized and showed high glycerol conversion and product selectivity in glycerol acetylation reaction. The synthesized catalyst exhibited mesoporous structure, large surface area, and good thermal stability. The catalyst was characterized by various analytical techniques including BET surface area analysis, XRD, TGA, SEM-EDX, FTIR, and TPD-NH3.
ARABIAN JOURNAL OF CHEMISTRY
(2023)
Review
Environmental Sciences
Nurul Najiha Datu Masjidin, Collin Glen Joseph, Yun Hin Taufiq-Yap, Ahmad Zuhairi Abdullah, Noor Fazliani Shoparwe, Nur Ammarah Affandi, Janice Lay Hui Nga
Summary: Aquaculture sectors are rapidly developing worldwide, but their untreated effluents can have detrimental effects on the environment. Pollution and industrial waste are endangering water resources and damaging ecosystems globally. Therefore, it is essential to develop treatment methods for wastewater. Photolysis and photocatalysis, as part of advanced oxidation processes (AOPs), offer a sustainable option for the removal of recalcitrant pollutants from aquaculture effluents. This review aims to provide an overview of the application of photolysis and photocatalysis for degradation of recalcitrant pollutants from aquaculture effluents, discussing degradation schemes, experimental factors, and employed photocatalysts.
ENVIRONMENTAL ENGINEERING AND MANAGEMENT JOURNAL
(2023)
