Tuning of active nickel species in MOF-derived nickel catalysts for the control on acetic acid steam reforming and hydrogen production |
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| Affiliation: | 1. Department of Chemical Engineering and Technology, Indian Institute of Technology (Banaras Hindu University), Varanasi 221005, India;2. Department of Civil and Environmental Engineering, Hanyang University, 222 Wangsimni-Ro, Seoul 04763, Republic of Korea;3. Analysis and Evaluation Department, Egyptian Petroleum Research Institute (EPRI), Nasr City, Cairo 11727, Egypt;1. Institute Hydrogen Economy, Yunosti Str., 18, Room. 1, Bashkiria, Oktyabrsky city, 452613, Russian Federation;2. Scientific Technical Centre TATA, Moscow Str., 29, Of.306, Sarov, Nizhny Novgorod Region, 607190, Russia;3. Fermaltech LTD, Aphrodita Palas, App.19, Burgas Region, Nessebar, Bulgaria, 8240, European Union;4. Fermaltech Montenegro DOO, Jadranski Put BB, Budva, 85310, Montenegro;5. Azerbaijan State Oil and Industry University, Baku, Azadlig-20 Ave, AZ1010, Azerbaijan;6. Sumgayit State University, Sumgayit City, 43rd Quarter, AZ 5008, Azerbaijan;1. Institute of Refrigeration and Cryogenic Engineering, Xi''an Jiaotong University, Xi''an, 710049, China;2. State Key Laboratory of Technologies in Space Cryogenic Propellants, Beijing, 100028, China;1. State Key Laboratory of Clean and Efficient Coal Utilization, Taiyuan University of Technology, Taiyuan, 030024, Shanxi, PR China;2. Key Laboratory of Coal Science and Technology, Ministry of Education, Taiyuan University of Technology, Taiyuan, 030024, Shanxi, PR China;3. College of Chemistry, Taiyuan University of Technology, Taiyuan, Shanxi, 030024 PR China;4. National Engineering Laboratory for Multi Flue Gas Pollution Control Technology and Equipment, School of Environment, Tsinghua University, Beijing 100084, China;1. Department of Civil and Environmental Engineering, Hanyang University, 222 Wangsimni-Ro, 04763, Republic of Korea;2. Analysis and Evaluation Department, Egyptian Petroleum Research Institute, Nasr City, 11727 Cairo, Egypt |
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| Abstract: | Acetic acid (AcOH) steam reforming for hydrogen (H2) generation was investigated using a zero valent nickel complex (Ni-comp) derived from a metal-organic framework precursor supported over aluminum oxide/lanthanum oxide-cerium dioxide (ALC). The effects of Ni loading ratio (10, 15, and 20 wt%) on the catacatalytic activity were investigated in the range of 400 to 650 °C to H2 generation. The Ni-comp/ALC catalysts exhibited almost complete conversion of AcOH (XAcOH >98%) to H2 (XH2>90%) alongside some impurities (e.g., carbon monoxide, methane, and carbon dioxide). A maximum H2 yield (91.36% (0.064 mol-1 gcat?1 h?1)) was attained at the following conditions: 15 wt% Ni loading, steam to carbon molar ratio of 6.5, weight hourly space velocity of 1.05 h?1, and 600 °C. The 15 wt% Ni catalyst maintained sufficient stability over 40 h reaction time. Accordingly, Ni-comp-ALC interactions were seen to efficiently improve the activity and stability of the catalyst so as to synergistically resist coke deposition and metal sintering through the formation of a large number of free Ni particles and oxygen vacancies. |
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| Keywords: | Nickel complex catalyst Metal-organic framework Hydrogen production Acetic acid steam reforming Reaction mechanism |
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