Article
Chemistry, Applied
Marco Pizzolato, Giulia Da Pian, Elena Ghedini, Alessandro Di Michele, Federica Menegazzo, Giuseppe Cruciani, Michela Signoretto
Summary: The effects of vanadium promotion on gamma-alumina supported nickel catalysts for methane dry reforming were investigated. The introduction of vanadium was crucial to hinder catalyst deactivation by coke deposition. The formation of nanotubes was reduced and hydrogen yield increased. When coupled with calcium, selectivity toward hydrogen/syngas production was improved. Under concentrated gases, vanadium was fundamental for a higher activity, with an increase of 30% and 15% in CH4 and CO2 conversions compared with the non-doped catalyst.
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, Physical
Robert Cherbanski, Tomasz Kotkowski, Eugeniusz Molga
Summary: Nickel-based catalysts used in the dry reforming of methane (DRM) face issues of coking and sintering, which limit their industrial application. The addition of an anti-coking additive (CaO) to a commercial nickel catalyst was investigated using thermogravimetric analysis. It was observed that the catalyst sintered at temperatures between 850 and 900 degrees C, leading to permanent deactivation. The coking and carbon gasification rates were found to be equal at temperatures of 796-860 degrees C for the tested Ni/CaO-Al2O3 catalyst, depending on the heating rate.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
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)
Article
Chemistry, Applied
Xiaoqing Yuan, Bin Li, Xiujun Wang, Baitao Li
Summary: Y Neodymium-modified hydrotalcite-derived nickel catalysts with different Nd contents showed varied catalytic properties in the dry reforming of methane reaction, with Ni7.5NdMgAlO catalyst exhibiting the best performance. Proper doping of neodymium can increase the exposure of active sites on the catalyst surface, effectively inhibit coke formation, and improve coke resistance.
FUEL PROCESSING TECHNOLOGY
(2022)
Article
Chemistry, Physical
Daichi Takami, Junya Tsubakimoto, Wirya Sarwana, Akira Yamamoto, Hisao Yoshida
Summary: The design of optimized photothermal catalysts is essential for the efficient conversion of CO2 into syngas using solar energy. This study demonstrated that silica-supported nickel catalysts prepared via Ni phyllosilicate exhibited superior catalytic performance and resistance to sintering and carbon deposition under visible and near-infrared light. The loading of nickel had positive and negative effects on the surface temperature and light absorption capacity, which influenced the photothermal catalytic activity for methane dry reforming.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Dingdi Wang, Patrick Littlewood, Tobin J. Marks, Peter C. Stair, Eric Weitz
Summary: Unlike the traditional steam reforming process, the dry reforming of methane directly utilizes CO2 to produce syngas. Catalyst deactivation caused by carbon deposition has hindered the industrialization of this process. However, this study provides evidence that carbon deposits on the catalyst surface are actually an intermediate product formed during the DRM reaction and can be removed by reaction with CO2. The presence and nature of carbon deposits have important implications for optimizing DRM reaction conditions and improving yields.
Article
Chemistry, Applied
Pedro Nothaft Romano, Jose Faustino Souza de Carvalho Filho, Joao Monnerat Araujo Ribeiro de Almeida, Eduardo Falabella Sousa-Aguiar
Summary: A series of mono and bimetallic catalysts based on Ni, Rh, and Pd supported on different materials were evaluated for the dry reforming of methane reaction. Ni-based catalysts suffered from deactivation but could be regenerated, while Pd-based catalysts deactivated due to coke deposition. Rh-based catalysts showed remarkable activity and stability.
Review
Chemistry, Physical
Fariborz Sharifianjazi, Amirhossein Esmaeilkhanian, Leila Bazli, Sara Eskandarinezhad, Samad Khaksar, Parisa Shafiee, Mohammad Yusuf, Bawadi Abdullah, Peyman Salahshour, Farnaz Sadeghi
Summary: This paper reviews the recent advances in Ni- and Co-based nanocatalysts for dry reforming of CH4, including the use of different supports, promoters, and new structures.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Materials Science, Ceramics
Kazem Bakhtiari, Amirhossein Shahbazi Kootenaei, Sarah Maghsoodi, Shima Azizi, Seyed Mostafa Tabatabaei Ghomsheh
Summary: This study demonstrates that surface modification and reconstruction of halloysite nanotubes through alkaline molten method can serve as an excellent support for different catalysts. The physicochemical properties of halloysite-supported Ni catalysts were significantly influenced by Ce, La, and Co in the dry reforming of methane. The halloysite-supported Ni catalyst containing Co exhibited the best activity and stability.
CERAMICS INTERNATIONAL
(2022)
Article
Engineering, Environmental
Miaomiao Zhang, Yibo Gao, Yanpeng Mao, Wenlong Wang, Jian Sun, Zhanlong Song, Jing Sun, Xiqiang Zhao
Summary: Efficient syngas production can be achieved through the use of lanthanum nickelate catalyst and deposited carbon under microwave irradiation, enhancing catalytic performance and process stability.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Applied
Andrea Cardenas-Arenas, Esther Bailon-Garcia, Dolores Lozano-Castello, Patrick Da Costa, Agustin Bueno-Lopez
Summary: The study demonstrates that high surface area mixed oxide nanoparticles prepared using a reversed microemulsion method show good catalytic activity and carbon resistance in dry methane reforming. Compared to conventional catalysts, these nanoparticles reduce carbon accumulation during DRM tests.
JOURNAL OF RARE EARTHS
(2022)
Article
Engineering, Environmental
Jeong-Cheol Seo, Eunkyung Cho, Jeongmin Kim, Seung Bo Kim, Jae-Rang Youn, Dong Hyun Kim, Praveen Kumar Ramasamy, Kyubock Lee, Chang Hyun Ko
Summary: This study found that doping various basic metals in nickel-supported alumina catalysts can effectively improve thermal stability, prolonging the reaction stability of nickel-based DRM catalysts. The discovery of the significant effect of Sr on resistance to coke formation offers new opportunities for developing effective nickel-based DRM catalysts with coke resistance by comprehensively considering various factors.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Chemistry, Physical
Ayse Genc, Huseyin Arbag, H. Mehmet Tasdemir, Nail Yasyerli, Sena Yasyerli
Summary: The aim of this study is to enhance the activity of the Ni catalyst in the presence of H2S by adding iron. Alumina-supported monometallic iron and bimetallic nickel-iron catalysts were synthesized and analyzed. The results showed that the iron addition improved the sulfur resistance and reduced coke deposition in the catalysts.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Engineering, Environmental
Jeong-Cheol Seo, Eunkyung Cho, Jeongmin Kim, Seung Bo Kim, Jae-Rang Youn, Dong Hyun Kim, Praveen Kumar Ramasamy, Kyubock Lee, Chang Hyun Ko
Summary: Doping strontium in nickel-supported alumina catalysts significantly enhances coke resistance, while doping with different basic metals like magnesium, calcium, strontium, barium, and lanthanum improves the thermal stability of the catalysts for maintaining long-term reaction stability.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Energy & Fuels
Muhammad Sheraz Ahmad, Chin Kui Cheng, Huei Ruey Ong, Hamidah Abdullah, Chi Shein Hong, Gek Kee Chua, Puranjan Mishra, Md Maksudur Rahman Khan
Summary: This work reported the valorization of glycerol into tartronic acid using a Pt/CNT electrocatalyst. The nanocatalyst was synthesized using a chemical reduction method with hydrazine as a reducing agent. The Pt/CNT nanoparticles exhibited high catalytic activity and selectivity.
ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS
(2023)
Article
Energy & Fuels
Ahasanul Karim, M. Amirul Islam, Puranjan Mishra, Abu Jafar Md Muzahid, Abu Yousuf, Md Maksudur Rahman Khan, Che Ku Mohammad Faizal
Summary: In this study, a co-culture of yeast and bacterium was used to optimize lipid accumulation capability and simultaneous treatment of wastewater. The process parameters were optimized using design of experiments as a statistical tool, and a prediction model was proposed to predict the lipid accumulation and COD removal performance of the co-culture system.
BIOMASS CONVERSION AND BIOREFINERY
(2023)
Article
Materials Science, Multidisciplinary
M. N. Aditya, Thangapandi Chellapandi, G. Krishna Prasad, M. Jyothi Pon Venkatesh, Md Maksudur Rahman Khan, Gunabalan Madhumitha, Selvaraj Mohana Roopan
Summary: In this study, a novel visible light-driven photocatalyst was constructed using graphitic carbon nitride and gadolinium oxide. The nanocomposite exhibited efficient catalytic activity in degrading organic pollutants under visible light. The characterization techniques and optimization experiments provided insights into the properties and performance of the catalyst.
DIAMOND AND RELATED MATERIALS
(2022)
Review
Environmental Sciences
Sumaya Tarannum Nipa, Rumana Akter, Al Raihan, Shahriar bin Rasul, Uday Som, Shafi Ahmed, Jahangir Alam, Maksudur Rahman Khan, Stefano Enzo, Wasikur Rahman
Summary: This review highlights the recent advances in biosynthesis of tin oxide (SnO2) nanoparticles (NPs) using a chemical precipitation method. It focuses on different methodologies, characterization, reaction mechanisms, and the photocatalytic application of SnO2 NPs for dye degradation. The review also discusses the use of bio-based precursors extracted from plants as capping or reducing agents, and explores the promising bio-reduction mechanism for synthesizing SnO2 NPs. Factors such as particle size, bandgap, crystal defects, and catalyst dosage are found to influence the final properties of the NPs.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Chemistry, Inorganic & Nuclear
Archita Rani Dash, Aadit J. Lakhani, Duraipandi Devi Priya, T. Surendra, Md Maksudur Rahman Khan, E. James Jebaseelan Samuel, Selvaraj Mohana Roopan
Summary: In this study, stannic oxide nanoparticles were synthesized using the polysaccharide extract of gum acacia. The synthesized nanoparticles were characterized, and their potential for photocatalytic degradation of ciprofloxacin was investigated. Optimized conditions were determined, and the results showed that the efficiency of ciprofloxacin removal reached 99.7%.
JOURNAL OF CLUSTER SCIENCE
(2023)
Article
Environmental Sciences
Thurga Devi Munusamy, Sim Yee Chin, Md Maksudur Rahman Khan
Summary: This research focuses on producing hydrogen from synthetic wastewater using CuO@exfoliated g-C3N4 nanoheterojunction as a photocatalyst, resulting in significantly enhanced hydrogen production compared to other catalysts.
Article
Green & Sustainable Science & Technology
Ahammed Jubair, Md Akhlakur Rahman, Md Maksudur Rahman Khan, Md Wasikur Rahman
Summary: The hydrogen sorption characteristics of magnesium hydride (MgH2) were enhanced by ball milling and the addition of metal oxides, particularly CuO. The presence of CuO led to a more significant effect on the desorption kinetics compared to Al2O3. The addition of metal oxides reduced the activation energy and energy waste, improving the hydrogen storage capacity of MgH2.
ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY
(2023)
Article
Chemistry, Inorganic & Nuclear
Mahmood Riyadh Atta, Maizatul Shima Shaharun, Md. Maksudur Rahman Khan, Bawadi Abdullah, Akram Fadhl Al-Mahmodi, Nur Diyan Mohd Ridzuan, Thurga Devi Munusamy, Lim Jun Wei
Summary: The photo-electrocatalytic properties of g-C3N4 modified with ZIF-8 and boron doping were investigated in this study. Various characterization techniques were used to analyze the physicochemical properties of the catalysts, and CO2 reduction experiments were conducted to evaluate their photo-electrocatalytic properties. The results showed that the addition of ZIF-8 significantly improved the photocatalysis performance of the catalyst, while boron doping only affected the electrical properties of g-C3N4.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Review
Pharmacology & Pharmacy
Murtaza Haider Syed, Mior Ahmad Khushairi Mohd Zahari, Md Maksudur Rahman Khan, Mohammad Dalour Hossen Beg, Norhayati Abdullah
Summary: Polymers, especially biopolymers, are increasingly being used as a more environmentally friendly alternative to petroleum-based polymers due to their low carbon footprint and easy degradation. Drug delivery systems, especially nanofibers, hold great promise in the field of medicine and are the focus of researchers for improved therapies and tailor-made treatments. This review discusses the importance of naturally abundant biopolymers in recent medical applications, particularly their role in drug delivery systems, and provides a crucial comparison of the advantages and disadvantages of major drug delivery systems.
JOURNAL OF DRUG DELIVERY SCIENCE AND TECHNOLOGY
(2023)
Article
Biochemistry & Molecular Biology
Kathleen Foo, Yong Yeow Liang, Woei Jye Lau, Md Maksudur Rahman Khan, Abdul Latif Ahmad
Summary: Desalination of high-salinity water, also known as hypersaline brine, is a method to address the issue of brine disposal. However, the energy consumption is high in hypersaline brine desalination due to the high operating pressure. A parametric analysis on a spiral wound membrane module was conducted to predict the performance of hypersaline brine desalination. The study found that a minimum inlet pressure of 75 bar is recommended to minimize energy consumption, and higher feed velocity can increase productivity without significantly increasing energy requirements. The efficiency of pressure recovery and pump play a crucial role in reducing specific energy consumption (SEC) in hypersaline brine desalination using spiral wound membrane, and utilizing them with high efficiencies (eta(R) >= 95% and eta(pump) >= 50%) can reduce SEC by at least 33% while achieving a comparable SEC with seawater reverse osmosis (SWRO) desalination (<5.5 kWh/m(3)).
Article
Chemistry, Multidisciplinary
May Ali Alsaffar, Mohamed Abdel Rahman Abdel Ghany, Alyaa K. Mageed, Adnan A. AbdulRazak, Jamal Manee Ali, Khalid A. Sukkar, Bamidele Victor Ayodele
Summary: Conventional methods are ineffective in eliminating and degrading contaminants such as BPA from wastewater, leading to increased interest in photocatalytic reactors. This study used model-based approaches to investigate the relationship between the textural properties of modified TiO2 photocatalysts and the degradation of BPA. The best-performing model was found to be a multilayer perceptron neural network with a 4-14-3 architecture.
APPLIED SCIENCES-BASEL
(2023)
Article
Chemistry, Multidisciplinary
Phonsan Saetiao, Napaphat Kongrit, Jakkrapong Jitjamnong, Chatrawee Direksilp, Chin Kui Cheng, Nonlapan Khantikulanon
Summary: A new sustainable solid carbon catalyst using pyrolytic coconut shell ash (CSA) has been developed for biodiesel synthesis. The optimum catalyst was found to be the 30 wt % K2CO3/CSA catalyst, with an obtained biodiesel yield of 97.14%. Techno-economic analysis showed a net present value of 5.16 million USD, a payback period of 2.49 years, and an internal rate of return of 44.2%. An environmental assessment revealed lower carbon dioxide emissions (1401.86 ton/y) compared to the conventional process (1784.6 ton/y).
Article
Engineering, Environmental
Khairul Naim Ahmad, Salma Samidin, Masli Irwan Rosli, Muhammad Rahimi Yusop, Mohammad B. Kassim, Bamidele Victor Ayodele, Mohd Ambar Yarmo, Wan Nor Roslam Wan Isahak
Summary: This study focuses on the development of nickel-based catalysts promoted with magnesium (Mg) and calcium (Ca) supported by exfoliated graphitic carbon nitride (eg-C3N4) for CO2 methanation. The Mg-promoted catalyst exhibits superior performance due to its mesoporous structure, better dispersion of small nickel nanoparticles, and stronger metal-support interaction. On the other hand, the presence of bulk CaCO3 in the Ca-doped catalyst negatively affects its performance. The incorporation of Mg as a promoter enhances the CO2 methanation activity by forming a NiO-MgO solid solution, increasing the interaction between metal and support, and creating more effective CO2 adsorption sites.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Organic
M. Nazim Uddin, M. Abdus Salam, M. Rakib Uddin, Maksudur R. Khan
Summary: Biodiesel derived from Mesua ferrea L. (Nahor oil) shows high potential as a renewable energy source that can substitute petroleum-derived fuel without any modification of the conventional diesel engine. A three-step process, including saponification, acidification, and esterification, is used to obtain biodiesel from Nahor oil. The presence of CaO enhances the saponification reaction, while a 1:1.5 molar ratio of soap to acid (HCl) at 70 degrees C temperature and ambient pressure results in faster and more complete acidification reaction. Biodiesel formation is optimal at a 1:6 molar ratio of fatty acids to methanol at 60 degrees C and atmospheric pressure, in presence of HCl as a catalyst. H-1 NMR spectroscopy confirms the full up-gradation of triglyceride (Nahor oil) to biodiesel. Detailed characterization shows that the properties of the derived biodiesel are compatible with petrodiesel standards to a certain extent, despite higher pour and cloud points. Biodiesel derived from Nahor seed oil exhibits better compatibility with petrodiesel than sunflower or Koroch seed oil.
PETROLEUM CHEMISTRY
(2022)