Article
Chemistry, Applied
Mauro Alvarez, Pablo Marin, Salvador Ordonez
Summary: In this study, a Cu/Y zeolite catalyst was prepared by solid-state ion exchange and was found to be a promising alternative to the traditional CuCl aqueous catalyst for the oxidative carbonylation of methanol. The reaction conditions were optimized and a rigorous kinetic model for the reaction was proposed.
FUEL PROCESSING TECHNOLOGY
(2023)
Article
Chemistry, Physical
Wei Xu, Zhihao Xu, Wenxuan Yao, Lihua Hu, Keqiang Ding, Gongde Wu, Guomin Xiao, Lijing Gao
Summary: UiO-66@CeO2 composites were prepared by loading CeO2 nanoparticles on the surface of UiO-66 using precipitation method, and the effect of CeO2 loading on the catalytic direct reaction of CO2 and methanol into dimethyl carbonate (DMC) was investigated. The results showed that UiO-66 framework structure benefited the high dispersion of CeO2, and the loading of CeO2 provided more oxygen vacancies, promoting the capture and absorb of CO2 and thus promoting the reaction synergistically. UiO-66@CeO2-60 exhibited the highest DMC formation rate of 2.84 mmol.g(-1).h(-1) (yield: 2.27%) within 4 h of reaction time under the optimum conditions, and the catalyst also showed favorable reusability maintaining similar to 90% of catalytic efficiency with 4 reuse cycles compared to the fresh ones.
APPLIED CATALYSIS A-GENERAL
(2023)
Article
Chemistry, Applied
Jaroslav Aubrecht, Violetta Pospelova, Oleg Kikhtyanin, Martin Vesely, David Kubicka
Summary: Supported copper catalysts are a promising alternative to replace CuCr catalysts in ester hydrogenolysis. This study investigates the effect of support properties on copper nanoparticles formation and the final hydrogenolysis performance. It is found that ZrO2 and alumina supports ensure good copper dispersion and achieve better catalytic performance. The number of acid-base sites affects the HDOL selectivity.
Article
Chemistry, Physical
Xiaojing Cui, Yequn Liu, Yangang Mei, Jiamei Li, He Zhang, Shanhui Zhu, Yulan Niu, Tiansheng Deng
Summary: A surface silylation method is found to efficiently suppress the reverse water-gas-shift reaction on a commercial Cu/ZnO/Al2O3 catalyst, leading to improved methanol selectivity and yield.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Biochemistry & Molecular Biology
Xu Li, Hua Shi, Yunhan Gu, Qingyan Cheng, Yanji Wang
Summary: A ternary mesoporous cerium lanthanum solid solution doped with metal elements (Co, Zr, Mg) was synthesized using a citric acid ligand assisted self-assembly method. The textural property of the solid solution was characterized, and catalytic testing for the synthesis of dimethyl carbonate (DMC) was conducted. The results showed that Co has a synergistic effect with La and Ce, and doping of Co on the solid solution improves the surface area, promotes CO2 adsorption and activation, and enhances the redox performance. The catalytic performance of the Ce-La-Co solid solution is positively correlated with oxygen vacancy content.
Article
Chemistry, Physical
Yi-Kai Chih, Yu-Qi Su, Wei-Hsin Chen, Bo-Jhih Lin, Jenn-Kun Kuo, Siming You, Hong-Ping Lin
Summary: This study utilizes a novel Ni-Cu/Al2O3 catalyst for the partial oxidation of methanol to produce hydrogen. The O2/C ratio is found to be the most influential factor in hydrogen yield, and the variation of Ni content in the catalyst affects the trend of hydrogen yield.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Multidisciplinary
Itzhak I. Maor, Svetlana Heyte, Oren Elishav, Meirav Mann-Lahav, Joelle Thuriot-Roukos, Sebastien Paul, Gideon S. Grader
Summary: A new architecture of Cu- and Cu/Zn-based catalysts supported on electrospun alumina nanofibers was synthesized for the synthesis of methanol and DME from CO2 and green hydrogen. The hierarchical fibrous structure of the catalyst played a crucial role in the reaction activity and selectivity. The Cu or Cu/ZnO formed a unique nanosheet structure, providing a large surface area for the reaction. The catalysts containing 7% wt. Cu/Zn with a weight ratio of 2.3 Zn to Cu achieved maximal production of methanol and DME.
Article
Nanoscience & Nanotechnology
V. Iacono, C. Lo Po, S. Scalese, S. Boninelli, G. G. Condorelli, M. G. Grimaldi, F. Ruffino
Summary: This study investigated the synthesis of copper and nickel nanoparticles as catalysts for alkaline water splitting reactions. The performance of these catalysts in hydrogen evolution and oxygen evolution reactions was evaluated, and the results showed that both copper and nickel nanoparticles exhibited good catalytic activity. The ultra-low amount of catalyst material used in this study achieved higher mass activity compared to existing technologies.
Article
Chemistry, Applied
Youwei Yang, Dawei Yao, Mengjiao Zhang, Antai Li, Yueqi Gao, Busha Assaba Fayisa, Mei-Yan Wang, Shouying Huang, Yue Wang, Xinbin Ma
Summary: A series of Mo-doped Cu/SiO2 catalysts were prepared and used for the hydrogenation of ethylene carbonate (EC), with the 0.5 wt% Mo-doped catalyst exhibiting the highest catalytic performance. The addition of Mo can enhance copper dispersion and prevent aggregation, leading to improved activation of EC. The insights gained from this study may help in designing more efficient copper-based catalysts for the hydrogenation of carbon-oxygen bonds.
Article
Chemistry, Physical
Yongdong Chen, Yue Li, Wei Chen, Wen Wu Xu, Zhong-kang Han, Ammara Waheed, Zhongbin Ye, Gao Li, Alfons Baiker
Summary: The study evaluated bismuth doped cerium oxide catalysts for continuous dimethyl carbonate (DMC) synthesis and found that bismuth incorporation facilitated controlling oxygen vacancy density, leading to increased DMC production rates. The highest DMC yield was obtained with the Bi0.12Ce0.88O delta catalyst, which showed stable activity over a 45-hour period. In-situ modulation excitation diffuse reflection Fourier transform infrared spectroscopy and first-principle calculations revealed that DMC synthesis occurs through reaction of a bidentate carbonate intermediate with activated methoxy species.
Article
Chemistry, Multidisciplinary
Chengrui Wang, Yanhong Fang, Guangfen Liang, Xiangyong Lv, Huamei Duan, Yandong Li, Dengfu Chen, Mujun Long
Summary: In this study, Cu-Ni bimetallic catalyst supported by graphene derivatives was used to convert CO2 to methanol. Different graphene derivatives affected the catalyst performance, with Cu-Ni catalyst on rGO showing higher active component. CuNi-rGO and CuNi-NGO could chemically activate more CO2 at lower temperature and reduce its activation energy.
JOURNAL OF CO2 UTILIZATION
(2021)
Article
Chemistry, Physical
Yunhan Gu, Qingyan Cheng, Xu Li, Shuai Zhang, Zhuo Wang, Yanji Wang
Summary: Fluorite high entropy oxides (HEOs) were synthesized and used as catalysts for synthesis of dimethyl carbonate (DMC) from methanol and carbon dioxide. The yield of DMC reached 7.6 mmol/g under specific reaction conditions. The structure of HEOs containing Ce, La, Pr, Sm, and Y elements was characterized and the synergistic effect among these elements improved the reaction rate.
Article
Chemistry, Physical
Hsin-Kai Huang, Yi-Kai Chih, Wei-Hsin Chen, Cheng-Yu Hsu, Kai-Jhei Lin, Hong -Ping Lin, Chun-Han Hsu
Summary: A green template-free method is proposed for the synthesis of mesoporous Ni-Cu/Al2O4 catalyst, which shows excellent catalytic performance and regeneration capability in methanol steam reforming.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Shiyu Xu, Yunxia Cao, Zhiming Liu
Summary: CexZr1-xO2 catalysts were prepared by the sol-gel method and used for the direct synthesis of dimethyl carbonate (DMC) from CO2 and methanol. Ce0.8Zr02O2 catalyst exhibited the highest catalytic activity, which may be attributed to its highest concentration of oxygen vacancy sites.
CATALYSIS COMMUNICATIONS
(2022)
Article
Energy & Fuels
Zhen-Hong He, Yong-Chang Sun, Yuan-Yuan Wei, Kuan Wang, Weitao Wang, Zhuo Chen, Zhong-Yu Wang, Yue Tian, Zhao-Tie Liu
Summary: This study developed a catalyst of CeO2 nanoparticles loaded on Co3O4 nanosheets that efficiently catalyze the reaction between methanol and CO2 to synthesize dimethyl carbonate (DMC). The catalyst exhibited high activity and yield of DMC by enhancing oxygen vacancies and CO2 adsorption while reducing methanol adsorption. The catalyst can simultaneously activate CO2 and methanol and the reaction follows a Langmuir-Hinshelwood mechanism.
Article
Engineering, Chemical
Thidarat Imyen, Nevzat Yigit, Peerapan Dittanet, Noelia Barrabes, Karin Fottinger, Gunther Rupprechter, Paisan Kongkachuichay
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2016)
Article
Chemistry, Physical
Paweena Prapainainar, Sumanut Maliwan, Kannikar Sarakham, Zehui Du, Chaiwat Prapainainar, Stuart M. Holmes, Paisan Kongkachuichay
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2018)
Article
Materials Science, Multidisciplinary
Nattanida Thepphankulngarm, Thanyalak Chaisuwan, Duangkanok Tanangteerapong, Paisan Kongkachuichay
Summary: Carbon dioxide adsorption using porous materials shows promise in preventing greenhouse gas emissions and capturing these gases. This study investigated the effect of different surfactants on the morphology and CO2 adsorption capacity of polybenzoxazine-derived carbon. It was found that the type and concentration of surfactant greatly influenced the carbon morphology and adsorption efficiency.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Engineering, Chemical
Waleeporn Donphai, Nattanida Thepphankulngarm, Thanyalak Chaisuwan, Duangkanok Tanangteerapong, Shawn C. Rood, Paisan Kongkachuichay
Summary: This study successfully synthesized copper and ruthenium loaded on nitrogen-doped polyben-zoxazine (PBZ)-derived carbons modified using surfactants. The carbons were modified with a surfactant, and their basicity was enhanced by nitrogen species doping. CeO2 and ZrO2 were loaded onto the carbons to promote the capture and dissociation of CO2. The Cu-Ru-Zr/Am-P123 material, prepared with ammonia as the nitrogen doping source and P123 surfactant, showed a high CO2 adsorption capacity and outstanding catalytic performance.
CHEMICAL ENGINEERING SCIENCE
(2023)
Article
Chemistry, Applied
Phantisa Limleamthong, Anurak Chuchuan, Nattanida Thepphankulngarm, Paisan Kongkachuichay
Summary: In this study, N-doped ordered mesoporous carbons (NCMK-3) were synthesized using urea and ammonia as nitrogen sources. XPS technique was used to quantify the nitrogen doping and classify the nitrogen bond formations. The results showed that 15 wt% of Cu-ZnO on the nitrogen-doped CMK-3 using urea as a nitrogen source (CZ/NCMK-3U) provided the highest space time yield (STY) of 512 mg(MeOH) g(cat)(-1) h(-1) at the reaction temperature and pressure of 250 degrees C and 1.5 MPa, respectively.
TOPICS IN CATALYSIS
(2023)
Article
Chemistry, Multidisciplinary
Varisara Deerattrakul, Anurak Chukchuan, Nattanida Thepphankulngarm, Jirayu Pornjaturawit, Napas Vacharameteevoranun, Thanyalak Chaisuwan, Paisan Kongkachuichay
Summary: The carbon material synthesized from polybenzoxazine, known as mesocarbon, exhibited excellent catalytic properties in direct methanol synthesis from CO2 hydrogenation. The high catalytic activity is attributed to the high surface area and nitrogen content of mesocarbon, which can prevent metal agglomeration and enhance hydrogen dissociation.
NEW JOURNAL OF CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Thidarat Imyen, Wanwisa Limphirat, Guether Rupprechter, Paisan Kongkachuichay