Article
Chemistry, Physical
Lingxiang Huang, Yue Ma, Mufan Niu, Shenyong Ren, Qiaoxia Guo, Chunming Xu, Baojian Shen
Summary: Dry reforming reaction of CH4 and CO2 over Ni-Fe bimetallic catalyst using C12A7-O2-in MCM-41 composite support was studied. Isotope tracing experiment revealed that CO mainly comes from 13CHx oxidation reaction and DH comes from CHx and D2O reaction, indicating the promotion of CHx oxidation by lattice oxygen and acceleration of methane conversion by water. XPS and TPSR-MS studies confirmed the presence of lattice oxygen in catalysts, which produced a small amount of H2O to facilitate a lower starting point. On-line MS investigation showed that trace water addition accelerated the adsorption of CO2 and promoted methane dissociation, with the oxidation reaction of CHx occurring after the dissociation of CO2. Additionally, TG analysis suggested that H2O could consume Cα on the catalyst during the reaction process to remove carbon deposition.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Review
Chemistry, Multidisciplinary
Luqmanulhakim Baharudin, Norhasyimi Rahmat, Nur Hidayati Othman, Nilay Shah, Syed Shatir A. Syed-Hassan
Summary: This article reviews the deactivation mechanisms of Ni-based catalyst in dry reforming of methane (DRM) due to carbon deposition and other carbon-induced factors, and provides perspectives on controlling and mitigating these deactivation problems through manipulation of reaction conditions and process parameters, as well as the design and development of highly active coke-resistant Ni-based catalysts.
JOURNAL OF CO2 UTILIZATION
(2022)
Article
Chemistry, Multidisciplinary
Ekaterina Smal, Yulia Bespalko, Marina Arapova, Valeria Fedorova, Konstantin Valeev, Nikita Eremeev, Ekaterina Sadovskaya, Tamara Krieger, Tatiana Glazneva, Vladislav Sadykov, Mikhail Simonov
Summary: Two series of Ni/Ce(Ti/Nb)ZrO2 catalysts were prepared using different synthesis methods and studied in dry reforming of methane. The composition of the support and the preparation method were found to influence the morphology and surface features of the catalysts. The addition of Ti increased the amount of carbon, while the use of supercritical supports resulted in a higher amount of coke. All compositions of catalysts showed similar carbon deposits in DRM.
Article
Energy & Fuels
Muhammad Usman Rashid, Wan Mohd Ashri Wan Daud, Nur Atikah Mohidem, Mardawani Binti Mohamad, Javaid Akhtar, Mudassar Azam, Waheed Miran
Summary: The reverse microemulsion synthesis route was used to prepare Ni/CeO2 catalysts for dry reforming of methane. The catalytic activity and stability were investigated, and it was found that the 40% Ni/CeO2 catalyst exhibited higher activity and stability compared to the 20% and 80% Ni/CeO2 catalysts. The proper balance between Ni metal and CeO2 content played a critical role in achieving better catalyst performance and reducing carbon deposition.
Article
Chemistry, Applied
Huy Nguyen-Phu, Taehyup Kim, Youngchan Kim, Ki Hyuk Kang, Hyungtae Cho, Junghwan Kim, Insoo Ro
Summary: We developed a synthesis route for highly active and stable nickel-based catalysts for dry methane reforming by manipulating the Mg/Al ratio. The presence of both spinel and periclase phases in the catalysts at a Mg/Al ratio of 1.5 (Ni-Mg1.5AlOx) resulted in the highest activity and stability. This work highlights the influence of catalyst phase on key factors determining activity and stability.
Article
Chemistry, Multidisciplinary
Sean Kelly, Elizabeth Mercer, Robin De Meyer, Radu-George Ciocarlan, Sara Bals, Annemie Bogaerts
Summary: We investigated the conversion of CO2 and CH4 in atmospheric pressure microwave plasma, focusing on reaction performance and carbon formation. The energy costs were promising, with the best performance to date for plasma-based dry reforming of methane. The conversion rates for CO2 and CH4 were in the range of 46-49% and 55-67% respectively, producing primarily syngas with H2/CO ratios of 0.6-1.
JOURNAL OF CO2 UTILIZATION
(2023)
Article
Chemistry, Applied
Peter Molgaard Mortensen, Marene Rautenbach
Summary: This work presents a method for producing CO-rich synthesis gas at low S/C ratios using a nickel-based catalyst system. The concept involves a two-reactor approach with an Adiabatic POst Converter (APOC) to allow operation at overall S/C ratios below 1.5.
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)
Article
Chemistry, Applied
Jaylin Sasson Bitters, Tina He, Elizabeth Nestler, Sanjaya D. Senanayake, Jingguang G. Chen, Cheng Zhang
Summary: Dry reforming of methane (DRM) is a process that converts carbon dioxide and methane into syngas, which can be used to produce various products. However, carbon deposition is a major cause of catalyst deactivation in DRM. Bimetallic catalysts, with their synergistic effects, improve catalytic stability and show potential in mitigating carbon deposition deactivation.
JOURNAL OF ENERGY CHEMISTRY
(2022)
Article
Materials Science, Multidisciplinary
Babalola Aisosa Oni, Olusegun Stanley Tomomewo, Samuel Eshorame Sanni, Victor Oyebamiji Ojo
Summary: Co has an impact on the stability and activity of the Co-La1_xCaxNiO3-ZrO2 catalyst under methane dry reforming conditions. The catalytic performance of the Co-based bimetallic catalyst was evaluated during the reduction reactions of perovskite precursors. Various characterization techniques were used to study the metal-metal/metal-support interactions and phase changes that occurred under the reaction conditions. The 2%Co-La0.2Ca0.8NiO3-ZrO2 catalyst showed the highest activity and demonstrated excellent stability, with high CO2 and CH4 conversions of 90% and 88% respectively, attributed to the synergistic interaction between Ni and Co in the catalyst's lattice.
MATERIALS TODAY COMMUNICATIONS
(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
Thermodynamics
Hussain A. Alibrahim, Siddig S. Khalafalla, Usama Ahmed, Seongho Park, Chul-Jin Lee, Umer Zahid
Summary: This study explores the production of syngas through standalone process models and integrated designs combining gasification and dry reforming. The integrated designs show improved energy efficiency, reduced CO2 emissions, and the lowest production cost of syngas among all designs.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Article
Chemistry, Physical
Yuanjie Xu, Zemin An, Xin Yu, Jikang Yao, Qian Lv, Hua Yang, Zhengang Lv, Huichuang Guo, Qike Jiang, Wei Liu, Lizhi Wu, Li Tan, Yihu Dai, Yu Tang
Summary: The SMSI effect of Rh nanoparticle catalyst supported on h-BN is investigated in the dry reforming of methane reactions. It is found that under reaction conditions, the catalyst is encapsulated by BOx overlayers, preventing the interaction between reactants and metal centers and improving the stability and activity of the catalyst.
JOURNAL OF CATALYSIS
(2023)
Article
Chemistry, Multidisciplinary
V. I. Savchenko, Ya. S. Zimin, A. V. Nikitin, I. V. Sedov, V. S. Arutyunov
Summary: A study was conducted on the kinetic and thermodynamic aspects of CO2 utilization in the non-catalytic dry reforming of light hydrocarbons at temperatures ranging from 1400-1800 K. The results demonstrate the efficient utilization of CO2 to enhance the yield of syngas during the reforming of hydrocarbons within this temperature range.
JOURNAL OF CO2 UTILIZATION
(2021)
Review
Chemistry, Physical
Geng Li, Yong Liu, Qiang Zhang, Qiushi Hu, Weihua Guo, Xiaohu Cao, Yubing Dou, Le Cheng, Yun Song, Jianjun Su, Libei Huang, Ruquan Ye
Summary: Electrochemical CO2 reduction reaction (CO2RR) has the potential to mitigate carbon emissions and provide valuable chemicals. In recent years, significant progress has been made in improving the performance of CO2RR, particularly in terms of product selectivity. The development of electrocatalysts and electrochemical cells has played a crucial role in achieving high current densities.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Chemistry, Physical
Peter M. Mortensen, Hudson W. P. de Carvalho, Jan-Dierk Grunwaldt, Peter A. Jensen, Anker D. Jensen
JOURNAL OF CATALYSIS
(2015)
Article
Microscopy
Peter Molgaard Mortensen, Thomas Willum Hansen, Jakob Birkedal Wagner, Anker Degn Jensen
Article
Chemistry, Physical
Melanie Hellinger, Sina Baier, Peter Molgaard Mortensen, Wolfgang Kleist, Anker Degn Jensen, Jan-Dierk Grunwaldt
Article
Chemistry, Physical
Peter M. Mortensen, Diego Gardini, Christian D. Damsgaard, Jan-Dierk Grunwaldt, Peter A. Jensen, Jakob B. Wagner, Anker D. Jensen
APPLIED CATALYSIS A-GENERAL
(2016)
Article
Chemistry, Applied
Peter M. Mortensen, Jan-Dierk Grunwaldt, Peter A. Jensen, Anker D. Jensen
Article
Engineering, Chemical
Peter Molgaard Mortensen, Jakob Soland Engbaek, Soren Bastholm Vendelbo, Mikkel Fougt Hansen, Martin Ostberg
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2017)
Article
Chemistry, Multidisciplinary
Morten G. Vinum, Mads R. Almind, Jakob S. Engbaek, Soren B. Vendelbo, Mikkel F. Hansen, Cathrine Frandsen, Jesper Bendix, Peter M. Mortensen
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2018)
Review
Thermodynamics
Trine M. H. Dabros, Magnus Zingler Stummann, Martin Hoj, Peter Arendt Jensen, Jan-Dierk Grunwaldt, Jostein Gabrielsen, Peter M. Mortensen, Anker Degn Jensen
PROGRESS IN ENERGY AND COMBUSTION SCIENCE
(2018)
Article
Chemistry, Applied
Mads Radmer Almind, Soren Bastholm Vendelbo, Mikkel Fougt Hansen, Morten Gotthold Vinum, Cathrine Frandsen, Peter Molgaard Mortensen, Jakob Soland Engbaek
Article
Multidisciplinary Sciences
Sebastian T. Wismann, Jakob S. Engbaek, Soren B. Vendelbo, Flemming B. Bendixen, Winnie L. Eriksen, Kim Aasberg-Petersen, Cathrine Frandsen, Ib Chorkendorff, Peter M. Mortensen
Article
Engineering, Chemical
Sebastian T. Wismann, Jakob S. Engbaek, Soren B. Vendelbo, Winnie L. Eriksen, Cathrine Frandsen, Peter M. Mortensen, Ib Chorkendorff
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2019)
Article
Chemistry, Multidisciplinary
Sebastian Thor Wismann, Kasper-Emil Larsen, Peter Molgaard Mortensen
Summary: Utilization of CO2 for sustainable production of carbon-based chemicals can be achieved through the reverse water-gas-shift reaction. The fully electrified reverse water-gas-shift (eRWGS) process, using ohmic heating and a nickel-based catalyst, allows for the production of synthesis gas with high hydrogen and carbon efficiency. This emissions-free route provides a sustainable solution for the production of carbon-based chemicals from CO2 and renewable electricity.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Nanoscience & Nanotechnology
Mads R. Almind, Morten G. Vinum, Sebastian T. Wismann, Mikkel F. Hansen, Soren B. Vendelbo, Jakob S. Engbaek, Peter M. Mortensen, Ib Chorkendorff, Cathrine Frandsen
Summary: The research demonstrates the induction heating of high-temperature endothermic catalytic reactions using nano-particles, and shows that the composition of Co-Ni alloy nanoparticles can be adjusted to optimize induction heating and catalytic activity for steam methane reforming. The balance between magnetic softness, Curie temperature, and catalytic activity leads to an optimal Co-Ni sample composition for maximizing reactor performance at a given operating temperature and induction field amplitude.
ACS APPLIED NANO MATERIALS
(2021)
Article
Instruments & Instrumentation
Mads R. Almind, Jakob S. Engbaek, Mikkel F. Hansen, Soren B. Vendelbo, Peter M. Mortensen, Christian D. Damsgaard, Thomas Veile, Ib Chorkendorff, Cathrine Frandsen
Summary: We have developed an in situ sample holder similar to a quartz-based plug-flow reactor for gas-controlled vibrating sample magnetometry (VSM) at ambient pressure and temperatures up to approximately 1000 degrees C. The results show that the holder allows control of gas composition and sample reduction/oxidation, with similar measurement sensitivity and improved repeatability compared to conventional sample cups. The in situ holder uses a closed gas tubing system to prevent contact between the active gas and the VSM and oven parts, and the gas can be collected for analysis and safe handling at the outlet.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2023)
Article
Chemistry, Physical
Ming-Yi Chen, Ngoc Thanh Thuy Tran, Ahmed Abubakar Alao, Wen-Dung Hsu
Summary: This study demonstrates the significance of surface Pt atom arrangement for the efficiency of ORR in PEMFCs and reveals the correlation between Pt-Pt average distance and O2 dissociation barrier. Furthermore, the study discovers a robust correlation between the level of the catalyst's d-band center and O2 adsorption energy. High-entropy alloy substrates provide potential for controlling Pt arrangement and O2 dissociation barrier.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Eduardo C. Atayde Jr, Babasaheb M. Matsagar, Yu-Cheng Wang, Kevin C. -W. Wu
Summary: This study presents the first application of an acidic MOF, Sulfated MOF-808, in catalyzing the HAA reactions of furan oligomers for the production of biofuel precursors. The catalyst showed high yield, selectivity, and recyclability, making it versatile for different starting materials.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Maria do Carmo Rangel, Francieli Martins Mayer, Soraia Jesus de Oliveira, Sergio Gustavo Marchetti, Fabricio Luiz Faita, Doris Ruiz, Giovanni Saboia, Mariana Kieling Dagostini, Jonder Morais, Maria do Carmo Martins Alves
Summary: This study developed a new catalyst by investigating the effect of magnesium on the catalytic properties of hematite in ethylbenzene dehydrogenation. The catalyst showed important differences in activity, selectivity, and stability, making it a promising candidate for commercial applications.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Yanjun Li, Qian Wang, Hui Tian, Mingyuan Zhu, Yuanyuan Liu
Summary: A novel strategy using microwave-assisted precipitation was proposed to prepare defective CsH3PMo11VO40 catalyst for the oxidation of methacrolein to methacrylic acid. Microwave treatment accelerates crystallization, increases vanadyl species content, and forms defective Keggin structures, thereby enhancing the oxidation capacity of the catalyst.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Rajeshwari Athavale, Sailee Gardi, Fatima Choudhary, Dayanand Patil, Nandkishor Chandan, Paresh More
Summary: In this study, a novel acidic ionic liquid catalyst was prepared and used for the synthesis of bis-indolyl methane derivatives. The catalyst exhibited short reaction times, easy purification, and reusability.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Masatomo Hattori, Takato Hattori, Masakuni Ozawa
Summary: Cu-added gamma-Al2O3 catalysts were prepared with varying Cu loadings and the effects of copper oxidation states on catalytic activity were investigated. The results showed that the addition of copper increased the catalyst activity, but excessive copper loading decreased catalytic activity. XRD and TEM analysis indicated the formation of a solid solution of copper oxide species on the surface of gamma-Al2O3. XAS and TPR data demonstrated variations in copper oxidation states among the catalysts.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Liwei Fang, Shiyang Niu, Shengsen Wang, Yiqing Lu, Yuanhui Cheng
Summary: In this study, PtNi alloy on nitrogen-doped carbon and SnO2 dual-support was designed to modulate the metal-support interaction, resulting in improved catalytic activity and stability for oxygen reduction reaction. The SnO2/PtNi/NC catalyst exhibited a strongly coupled interface, enhanced electron transfer, and higher half-wave potential compared to PtNi/NC and commercial Pt/C.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Shohei Harada, Duanxing Li, Kenta Iyoki, Masaru Ogura
Summary: This study investigates the catalytic performance of a composite catalyst composed of ZnZrOX and H-zeolite for the hydrogenation of CO2. The deactivation of the composite catalyst is influenced by ion exchange of Zn2+ and/or coke, with their effects differing based on the zeolite structure. Separating the grains of the composite catalyst can prevent deactivation.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Laura Proano, Christopher W. Jones
Summary: In this study, NiGa alloy particles supported on CeO2, ZrO2, and ZrO2-CeO2 solid solutions were prepared and characterized. The nature of the support was found to have a significant influence on the catalyst's activity and selectivity, with the crystalline structure of ZrO2 having the greatest impact. Pure ZrO2 showed the highest methanol selectivity and CO2 conversion at high Zr:Ce ratios. In equimolar and Ce-rich conditions, basic sites and oxygen vacancies were found to be the key parameters affecting methanol production.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Liyan Zhang, Yinze Yang, Leilei Zhou, Fengyu Zhao, Haiyang Cheng
Summary: 1,6-Hexamethylenediamine was successfully synthesized via the reductive amination of 1,6-hexanediol using a Ru/PRL(x)-Al2O3 catalyst. The highly dispersed and anchored Ru species, formed by 1,10-phenanthroline (PRL), played a crucial role in the catalytic reaction. The formation of new acid-base pairs, electron deficient Ru species, and smaller nanoparticles contributed to the improved catalytic performances of the Ru/PRL-Al2O3 catalyst.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Anita Horvath, Miklos Nemeth, Andrea Beck, Gyorgy Safran, Valeria La Parola, Leonarda Francesca Liotta, Gregor Zerjav, Matevz Roskaric, Albin Pintar
Summary: This study investigates the catalytic and structural changes caused by the addition of 0.25 wt% indium in a 3% Ni/CeO2-Al2O3 catalyst prepared by impregnation method. The results show that the addition of indium can decrease the activity of the catalyst, but it improves its stability and reduces coking.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Ankush Kularkar, Vaibhav Vilas Khedekar, Sachin D. Chaudhari, Mudavath Ravi, Sadhana S. Rayalu, Penumaka Nagababu
Summary: Efficiently addressing the challenges of photocatalytic CO2 reduction to CH3OH is crucial. This study developed Zn-BTC MOF and its composites with CaIn2S4, achieving highly efficient and robust photocatalytic CO2 reduction to CH3OH under ambient conditions, using H2O2 as the hydrogen source. Among the composites, ZMCIS4 demonstrated excellent performance with a CH3OH evolution of 49100 μmol/g.cat and a quantum efficiency of approximately 78.41%. The enhanced performance was attributed to the production of nascent hydrogen atoms (H center dot) through the photo-splitting of H2O2 on the ZMCIS surface.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Dan Liu, Yudong Li, Chengyu Wang, Haiyue Yang, Rong Wang, Shujun Li, Xiaohui Yang
Summary: In this study, a self-supporting three-dimensional porous Co3O4 nanobelt array decorated on nickel foam (P-Co3O4 -NBA@NF) electrode with numerous active sites was successfully constructed for the oxidation of 5-Hydroxymethylfurfural (HMF) to 2,5-furan dicarboxylic acid (FDCA). The P-Co3O4 -NBA@NF electrode demonstrated high conversion efficiency, selectivity, and Faraday efficiency, as well as remarkable long-term stability. This research provides a promising electrocatalyst for biomass conversion.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Yimin Li, Enggah Kurniawan, Fumiya Sato, Takayoshi Hara, Yasuhiro Yamada, Satoshi Sato
Summary: In this study, several silica-alumina catalysts modified with Ag were examined for the dehydration of 1,3-butanediol to 1,3-butadiene. Among them, an amorphous silica-alumina catalyst (SAL-3) modified with Ag showed the highest improvement in catalytic activity and stability when operated in H2 flow. The generation of reversible acid sites was found to be the reason behind the enhanced activity and stability of this Ag/SAL-3 catalyst. The effects of various parameters on the catalytic activity of Ag/SAL-3, such as reaction temperature, contact time, Ag content, and carrier gas, were investigated.
APPLIED CATALYSIS A-GENERAL
(2024)