Article
Energy & Fuels
Anh Ngoc T. Cao, Cham Q. Pham, Tung M. Nguyen, Thuan Van Tran, Pham T. T. Phuong, Dai-Viet N. Vo
Summary: Dysprosium (Dy) promoted Co/Al2O3 catalysts with different Dy loadings were synthesized and found to enhance the basicity and activity of the catalysts for methane dry reforming. The addition of Dy reduced the crystallite size of Co3O4, resulting in better metal dispersion and higher catalytic performance. The optimal Dy loading was found to be 0.3 wt%, achieving the highest CH4 conversion and H-2 and CO yields.
Article
Chemistry, Physical
Anh Ngoc T. Cao, Cham Q. Pham, Le Kim Hoang Pham, Dang Le Tri Nguyen, Pham T. T. Phuong, Thi Tuong Vi Tran, Van-Phuoc Nguyen, Thanh Binh Nguyen, Quyet Van Le, Ngoc Anh Nguyen, Tung M. Nguyen
Summary: The metal-support interface plays a crucial role in the dispersion and catalytic activity of catalysts. This study investigated the effect of cerium on cobalt catalyst supported on gamma-alumina and found that cerium promoted the dispersion and reducibility of cobalt, leading to improved conversion of methane and carbon dioxide.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Ngoc Thang Tran, Thong Le Minh Pham, Trinh Duy Nguyen, Nguyen Van Cuong, Tan Ji Siang, Pham T. T. Phuong, A. A. Jalil, Quang Duc Truong, Sumaiya Zainal Abidin, Ftwi Y. Hagos, Sonil Nanda, Dai-Viet N. Vo
Summary: The study demonstrated that mesoporous gamma-alumina (gamma-Al2O3) synthesized as a support for Co catalyst showed excellent stability and high performance in methane dry reforming, indicating potential applications in the field.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Energy & Fuels
Cao-Minh Vo, Anh Ngoc T. Cao, Amjad Saleh Qazaq, Cham Q. Pham, Dang Le Tri Nguyen, Mabkhoot Alsaiari, Tuan V. Vu, Ajit Sharma, Pham T. T. Phuong, Thuan Tran Van, Moustafa A. Rizk, Tung M. Nguyen, Dai-Viet N. Vo
Summary: This work investigated the upgrading of simulated biogas through dry reforming using calcium-promoted cobalt-based catalysts. The study found that the loading of calcium is critical in the catalyst performance, with low dosages resulting in smaller cobalt crystalline size and enhanced reducibility and basicity. The optimal catalyst showed high CH4 and CO2 conversions, as well as suppressed coke formation, leading to improved activity and stability. These findings offer new opportunities to enhance the performance of dry reforming using abundant catalysts.
Article
Chemistry, Multidisciplinary
Chengxuan He, Shiqun Wu, Qixin Li, Mingyang Li, Jiaying Li, Lingzhi Wang, Jinlong Zhang
Summary: A Ru single-atom-modified hierarchical porous TiO2-SiO2 catalyst was reported for photocatalytic dry reforming of methane (DRM), showing remarkable activity and durability under mild conditions. The catalyst provided matched active sites for CH4 and CO2 adsorption and activation, optimizing the reaction route for inhibiting side reactions and promoting effective C-O coupling.
Article
Chemistry, Physical
Aida Younis, Jane Estephane, Cedric Gennequin, Lucette Tidahy, Bilal El Khoury, Samer Aouad, Edmond Abi Aad
Summary: The catalytic dry reforming of plastic waste using two-stage fixed bed reactors has been studied. It was found that the syngas production increased with the increase of nickel loading, and the addition of a small quantity of ruthenium significantly improved the plastic conversion into syngas, leading to the maximum syngas yield under certain conditions.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Applied
Jinchen Ma, Xue Zhang, Peng Peng, Xin Tian, Mengshuang Li, Ying Li, Zuwei Xu, Haibo Zhao
Summary: In this study, LaFeO3 perovskite with an ordered porous structure was synthesized via the sol-gel method and used as an oxygen carrier for chemical looping dry reforming (CLDR) of ethane. The performance and characteristics of the oxygen carrier and the CLDR process were comprehensively investigated. Results showed that LaFeO3 efficiently converted ethane into syngas (H2 and CO), and the deposited carbon on the oxygen carrier could be effectively removed by CO2. The highest C2H6 conversion, CO yield, and CO selectivity were achieved at 800 degrees C and 12,000 L/(kg center dot h).
FUEL PROCESSING TECHNOLOGY
(2023)
Article
Chemistry, Applied
Srikar Bhattar, Md Ashraful Abedin, Swarom Kanitkar, James J. Spivey
Summary: Perovskite-derived catalysts in dry reforming of methane exhibit superior catalytic performance due to the synergistic effects of bimetallic addition at the B site and enhanced oxygen mobility through A site substitutions. The use of high surface area supports also greatly influences the physicochemical and catalytic behavior of perovskite-derived catalysts. The exsolution process involved in the reduction of perovskite catalysts produces smaller size metal particles which dictate the superior catalytic performance of these materials.
Article
Chemistry, Physical
Wenbo Kong, Yu Fu, Lei Shi, Shenggang Li, Evgeny Vovk, Xiaohong Zhou, Rui Si, Bingrong Pan, Changkun Yuan, Shuqing Li, Fufeng Cai, He Zhu, Jun Zhang, Yong Yang, Yuhan Sun
Summary: Precisely decorating the Ni surface with SiO2 can prevent carbon deposition and enhance the stability of the catalyst. The Ni-O···Si center enables the activation of CH4 to form CHx instead of carbon. Through effective interfacial confinement, SiO2 can significantly alter the electronic properties of Ni particles.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Chemistry, Multidisciplinary
Alexandra Victoria Tavasoli, Mikaela Preston, Geoffrey Ozin
Summary: A techno-economic model is used to simulate fifteen case studies of a solar dry reforming process, aiming to explore technical challenges associated with its commercial application. The study found that the minimum catalyst activities required for most applications have been demonstrated in the scientific literature over the past two decades, but improvements in photoreactor engineering are needed for practical realization.
ENERGY & ENVIRONMENTAL SCIENCE
(2021)
Review
Chemistry, Multidisciplinary
Siti Nor Amira Rosli, Sumaiya Zainal Abidin, Osarieme Uyi Osazuwa, Xiaolei Fan, Yilai Jiao
Summary: This designated review focuses on the role of catalyst's oxygen mobility/vacancy in carbon gasification during the dry reforming of methane (DRM). It provides an overview of advanced nanocatalysts used in DRM and discusses the effects of their physicochemical properties on catalytic performance. Additionally, the carbon gasification route/mechanism and kinetics in DRM are elaborated. This review serves as a knowledge base for further research and development in this promising catalytic field.
JOURNAL OF CO2 UTILIZATION
(2022)
Article
Chemistry, Physical
Thanh Son Phan, Doan Pham Minh
Summary: Dry reforming of methane (DRM) is a promising process for producing synthetic gas, and the design of an effective catalyst is crucial. In this study, nickel catalysts supported by calcium hydroxyapatite (HAP) and HAP-doped magnesium (Mg_HAP) were synthesized and evaluated in the DRM reaction. The Ni/HAP and Ni/Mg_HAP catalysts showed outstanding performance due to the tunable acidity-basicity of the supports, strong metal-support interaction, and good thermal stability of nickel nanoparticles. The main products were H2 and CO, with stable selectivity around 85%, while H2O and solid carbon were byproducts with 5-10% selectivity.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Review
Energy & Fuels
Shuowen Guo, Yinghui Sun, Yanbin Zhang, Chenghu Zhang, Ying Li, Jie Bai
Summary: This article provides an overview of dry reforming of methane (DRM) reaction and its application in catalysts, with a focus on the development and limitations of NiCo bimetallic catalysts. The correlation between component properties and catalytic performances, the effect of preparation methods, and the reaction mechanisms of the catalysts are discussed. The deactivation issues caused by carbon deposition and bimetallic sintering are highlighted, and the role of promoters in overcoming these issues is emphasized.
Article
Chemistry, Multidisciplinary
T. F. Sheshko, T. A. Kryuchkova, L. V. Yafarova, E. M. Borodina, Y. M. Serov, I. A. Zvereva, A. G. Cherednichenko
Summary: This study investigated the effect of substituting cobalt for iron in perovskite-type oxides GdCoxFe1-xO3 on their physical properties and catalytic performance in dry reforming of methane (DRM). It was found that the introduction of cobalt can improve catalytic performance and decrease the process temperature. The catalytic activity increases with the proportion of cobalt.
SUSTAINABLE CHEMISTRY AND PHARMACY
(2022)
Article
Engineering, Chemical
Bo Gong, Tongming Su, Xinling Xie, Hongbing Ji, Zuzeng Qin
Summary: Supported Ni-based catalysts were easily sintered and deactivated in the dry re-forming of methane. Mg-substituted hydroxyapatite (HAP) catalysts (Ni/Mg(x)HAP, x = 0, 0.5, 1, 1.5) with 3% Ni loaded were prepared to solve this problem. The presence of Mg in the HAP lattice promoted Ni entry and inhibited carbonate formation, leading to enhanced catalytic activity and stability.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Energy & Fuels
Pooya Lahijani, Maedeh Mohammadi, Abdul Rahman Mohamed
Summary: This study investigates the co-gasification of tire char and rambutan peel. The results show that high proportion of tire char inhibits the gasification reaction, while higher content of biomass promotes the reaction. In addition, natural catalysts in the biomass also have a synergistic effect on the reaction.
BIOMASS CONVERSION AND BIOREFINERY
(2022)
Article
Environmental Sciences
Nor Fazila Khairudin, Maedeh Mohammadi, Abdul Rahman Mohamed
Summary: This study focused on developing alumina-supported cobalt (Co/Al2O3) catalysts for dry reforming of methane (DRM) with high catalytic activity and long-term stability, attributed to the small Co particle size with good dispersion on the alumina support and strong metal-support interaction.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Environmental Sciences
S. Anthonysamy, P. Lahijani, M. Mohammadi, A. R. Mohamed
Summary: This study investigated the low-temperature oxidative uptake of NO on alkali-modified biochar, showing that the NO capture capacity was significantly improved after modification. The adsorption capacity of KOH-activated biochar reached 87.0 mg/g at 30 degrees C, mainly attributed to factors like oxygen functionalities and carbon defects.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2022)
Article
Chemistry, Physical
YeeJie Wong, Young Hyun Choi, Shunsuke Tanaka, Haruka Yoshioka, Kozo Mukai, Harry H. Halim, Abdul Rahman Mohamed, Kouji Inagaki, Yuji Hamamoto, Ikutaro Hamada, Jun Yoshinobu, Yoshitada Morikawa
Summary: The study revealed that CO2 adsorption on Pt surfaces occurs at terrace, step, and defect sites with different energies, and is more stable at higher coverage due to lateral attractive interactions between CO2 molecules. The experimentally measured adsorption energies of CO2 on Pt were successfully reproduced using various functionals in density functional theory calculations.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Materials Science, Ceramics
Maher T. Alshamkhani, Pooya Lahijani, Keat Teong Lee, Abdul Rahman Mohamed
Summary: In this study, the switching voltage technique was used to efficiently exfoliate graphite in eutectic molten salts. The exfoliated graphene samples exhibited high production yields, low ID/IG ratios, and good electrical conductivities. Compared to constant voltage exfoliation, the switching voltage technique produced smoother graphene flakes with less agglomeration, crumbling, and wrinkling. Characterization analysis confirmed the smaller crystallite size, lower thickness, and higher quality and purity of the exfoliated graphene prepared using the switching voltage technique.
CERAMICS INTERNATIONAL
(2022)
Article
Environmental Sciences
Norhusna Mohamad Nor, Lau Lee Chung, Abdul Rahman Mohamed
Summary: The utilization of microwave heating and nitrogen-modification can generate adsorbents with superior performance for efficient removal of hydrogen sulfide (H2S). The modified palm shell activated carbon synthesized using microwave heating exhibited excellent properties, including a large surface area and new pore structures. Microwave heating assisted in the development of the adsorbent's properties and contributed to high removal of H2S at low adsorption temperature.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Review
Energy & Fuels
Nuradibah Mohd Amer, Pooya Lahijani, Maedeh Mohammadi, Abdul Rahman Mohamed
Summary: This article reviews the recent studies on biochar as a material for carbon capture, including its preparation and modification methods, and the influence on its physical, chemical, and physicochemical properties. Biochar exhibits high CO2 adsorption performance and sustainable performance, which are crucial for large-scale CO2 capture.
BIOMASS CONVERSION AND BIOREFINERY
(2022)
Review
Chemistry, Physical
Lutfi Kurnianditia Putri, Boon-Junn Ng, Wee-Jun Ong, Siang-Piao Chai, Abdul Rahman Mohamed
Summary: This article reviews the potential, design strategies, and material progress of photoelectrochemical CO2 reduction reaction (PEC CO2RR), as well as summarizes and discusses various photocathode semiconductor materials. Finally, perspectives on the design of photocathodes for CO2RR and new paradigms in the field are proposed.
ADVANCED ENERGY MATERIALS
(2022)
Article
Energy & Fuels
Anis Natasha Shafawi, Pooya Lahijani, Maedeh Mohammadi, Abdul Rahman Mohamed
Summary: Sequential ultrasonication and metal modification can enhance the CO2 capture capacity of biochar, but no synergistic effect was observed when they were applied together. Ultrasonication and metal modification can modulate the physicochemical properties of biochar, affecting its CO2 capture performance. The Avrami kinetic model can better predict the CO2 adsorption on biochar.
BIOMASS CONVERSION AND BIOREFINERY
(2022)
Review
Chemistry, Inorganic & Nuclear
Bashaer Mahmoud Namoos, Abdul Rahman Mohamed, Khozema Ahmed Ali
Summary: The desire to improve photocatalytic activity is increasing, especially in semiconductors. Porous photocatalysts have been synthesized to improve surface area and reduce recombination of electron-hole pairs. This paper reviews recent works on porous photocatalysts, with a focus on synthesis and fabrication methods. The topotactic transition technique is the best method for metal oxide porous photocatalysts, while self-organizing blocks are the best method for polymeric porous photocatalysts, especially for growing and fixing 1D semiconductor nanomaterials on 3D and 2D semiconductors on 2D. The hard template method allows for better control of particle shape and size, but the template removal is non-ecofriendly, making the soft template method more favorable. The etching method, on the other hand, is suitable for fabricating porous photocatalysts through a membrane by utilizing the electrical charge created by moving electrons in the electrolyte as a driving force.
JOURNAL OF SOLID STATE CHEMISTRY
(2023)
Review
Engineering, Environmental
Michelle Mei Xue Lum, Kim Hoong Ng, Sin Yuan Lai, Abdul Rahman Mohamed, Abdulkareem Ghassan Alsultan, Yun Hin Taufiq-Yap, Mei Kee Koh, Mohamad Azuwa Mohamed, Dai-Viet N. Vo, Manjulla Subramaniam, Kyle Sebastian Mulya, Nathasya Imanuella
Summary: Air pollution from untreated sulfur dioxide-rich flue gas is a major environmental and human health issue. Many sulfur dioxide removal technologies have been developed, but conventional methods generate by-products. Catalytic reduction of sulfur dioxide offers a sustainable solution with high efficiency and the recovery of valuable solid sulfur. This review discusses recent advances and the potential of this technology.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2023)
Review
Chemistry, Multidisciplinary
Xin-Quan Tan, Wuwei Mo, Xinlong Lin, Jian Yiing Loh, Abdul Rahman Mohamed, Wee-Jun Ong
Summary: The electro/photocatalytic CO2 reduction reaction (CO2RR) is an important approach for the synthesis of renewable fuels and value-added chemicals. MXenes, a type of 2D transition metal carbides, nitrides, and carbonitrides, show great potential in electrocatalysis and photocatalysis due to their unique properties. This review provides an overview of recent advances in MXene-based catalysts for the electrocatalytic and photocatalytic CO2RR, including their structure, synthesis pathways, and activity enhancement strategies. The review also discusses the current state of research in the field and proposes future perspectives.
Article
Engineering, Environmental
Maher T. Alshamkhani, Lutfi Kurnianditia Putri, Pooya Lahijani, Keat Teong Lee, Abdul Rahman Mohamed
Summary: In this study, an electrochemically exfoliated graphene/graphite carbon nitride ((EG)/g-C3N4) heterojunction photocatalyst was synthesized for CO2 photoreduction to methane. The best-performing photocatalyst (0.075 EG-CN) showed a significant enhancement in CH4 production with 98.6% selectivity after 6 hours of light irradiation compared to pure CN. The developed photocatalyst exhibited high stability after consecutive cycles of CO2 photoreduction to CH4.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Review
Chemistry, Physical
Xin-Quan Tan, Sue-Faye Ng, Abdul Rahman Mohamed, Wee-Jun Ong
Summary: This article introduces the recent advances in experimental and computational studies on the interfacial design of 0D nanostructures on 2D graphitic carbon nitride (g-C3N4). By engineering point-to-face contact between 2D g-C3N4 and 0D nanomaterials, heterojunction interfaces can be formed, which is beneficial for photocatalytic reactions. Different types of 0D nanostructures and synthesis strategies for photocatalytic applications are discussed.
Article
Chemistry, Physical
Jie-Yinn Tang, Chen-Chen Er, Lling-Lling Tan, Yi-Hao Chew, Abdul Rahman Mohamed, Siang-Piao Chai
Summary: This study systematically unraveled the effect of defect engineering on the properties and catalytic performance of graphitic carbon nitride (g-C3N4). By introducing various defect sites, the study achieved improved charge separation efficiency and CO2 adsorption affinity in g-C3N, providing a more feasible pathway for CO2 reduction.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)