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Hydrothermal Sintering and Oxidation of an Alumina-Supported Nickel Methanation Catalyst Studied Using In Situ Magnetometry. Catalysts 2021. [DOI: 10.3390/catal11050636] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The presented study investigated the effects of temperature (350–650 °C) and gas environment (pure Ar versus a H2O/H2 partial pressure ratio (PH2O/PH2) of 5) on the extent of sintering and oxidation of Al2O3-supported Ni0 nanoparticles (≈4 nm). We note that a PH2O/PH2 of 5 corresponds to a simulated CO conversion of 94% during methanation. Sintering and oxidation were studied using in situ magnetometry, while ex situ TEM analyses confirmed the particle sizes before and after the magnetometry-based experiments. It was found that increasing the temperature from 350 to 650 °C in Ar at atmospheric pressure causes a negligible change to the average size and degree of reduction (DOR) of the starting Ni0 nanoparticles. However, studying the same temperature window under hydrothermal conditions at 10 bar causes significant particle growth (≈9 nm) and the development of a bimodal distribution. Furthermore, the presence of steam decreases the DOR of Ni0 from 86.2% after initial activation to 22.2% due to oxidation. In summary, this study reports on the expected sintering and oxidation of Ni-based catalysts under high CO conversion conditions at elevated temperatures during methanation. Importantly, we were able to demonstrate how magnetometry-based analyses can provide similar size information (and changes thereof) as those observed with TEM but with the added advantage that this information can be obtained in situ.
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Veiga S, Romero M, Faccio R, Segobia D, Duarte H, Apesteguía C, Bussi J. Hydrogen-rich gas production by steam and oxidative steam reforming of crude glycerol over Ni-La-Me mixed oxide catalysts (Me= Ce and/or Zr). Catal Today 2020. [DOI: 10.1016/j.cattod.2019.02.008] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Green Synthetic Fuels: Renewable Routes for the Conversion of Non-Fossil Feedstocks into Gaseous Fuels and Their End Uses. ENERGIES 2020. [DOI: 10.3390/en13020420] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Innovative renewable routes are potentially able to sustain the transition to a decarbonized energy economy. Green synthetic fuels, including hydrogen and natural gas, are considered viable alternatives to fossil fuels. Indeed, they play a fundamental role in those sectors that are difficult to electrify (e.g., road mobility or high-heat industrial processes), are capable of mitigating problems related to flexibility and instantaneous balance of the electric grid, are suitable for large-size and long-term storage and can be transported through the gas network. This article is an overview of the overall supply chain, including production, transport, storage and end uses. Available fuel conversion technologies use renewable energy for the catalytic conversion of non-fossil feedstocks into hydrogen and syngas. We will show how relevant technologies involve thermochemical, electrochemical and photochemical processes. The syngas quality can be improved by catalytic CO and CO2 methanation reactions for the generation of synthetic natural gas. Finally, the produced gaseous fuels could follow several pathways for transport and lead to different final uses. Therefore, storage alternatives and gas interchangeability requirements for the safe injection of green fuels in the natural gas network and fuel cells are outlined. Nevertheless, the effects of gas quality on combustion emissions and safety are considered.
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Han X, Yue L, Zhao C, Jiang S, Liu J, Li Y, Ren J. Comparison of Machine Learning Algorithms in Screening Potential Additives to Ni/Al
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Methanation Catalysts for Improving the Anti‐Coking Performance. ChemistrySelect 2019. [DOI: 10.1002/slct.201902627] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Xiaoxia Han
- Taiyuan University of TechnologyCollege of Electrical and Power Engineering No. 79 Yingze West Street Taiyuan 030024 China
| | - Lin Yue
- Taiyuan University of TechnologyCollege of Electrical and Power Engineering No. 79 Yingze West Street Taiyuan 030024 China
| | - Chaofan Zhao
- Taiyuan University of TechnologyCollege of Electrical and Power Engineering No. 79 Yingze West Street Taiyuan 030024 China
| | - Shaohua Jiang
- Wuyi UniversitySchool of Biotechnology and Health Sciences No. 22 dongcheng village Jiangmen 529020 China (S. Jiang
| | - Junjie Liu
- National Institute of MetrologyDivision of Nanoscale Measurement and Advanced Materials No. 18, Bei San Huan Dong Lu, Chaoyang Dist Beijing 100029 China
| | - Yuting Li
- Taiyuan University of TechnologyKey Laboratory of Coal Science and Technology No. 79 Yingze West Street Taiyuan 030024 China
| | - Jun Ren
- Taiyuan University of TechnologyKey Laboratory of Coal Science and Technology No. 79 Yingze West Street Taiyuan 030024 China
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Wang F, Zhang JC, Chen ZQ, Lin JD, Li WZ, Wang Y, Chen BH. Water-saving dry methanation for direct conversion of syngas to synthetic natural gas over robust Ni0.1Mg0.9Al2O4 catalyst. J Catal 2019. [DOI: 10.1016/j.jcat.2019.06.021] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Highly Dispersed Ni Nanocatalysts Derived from NiMnAl-Hydrotalcites as High-Performing Catalyst for Low-Temperature Syngas Methanation. Catalysts 2019. [DOI: 10.3390/catal9030282] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Increasing the low-temperature performance of nickel-based catalysts in syngas methanation is critical but very challenging, because at low temperatures there is high concentration of CO on the catalyst surface, causing formation of nickel carbonyl with metallic Ni and further catalyst deactivation. Herein, we have prepared highly dispersed Ni nanocatalysts by in situ reduction of NiMnAl-layered double hydroxides (NiMnAl-LDHs) and applied them to syngas methanation. The synthesized Ni nanocatalysts maintained the nanosheet structure of the LDHs, in which Ni particles were decorated with MnOy species and embedded in the AlOx nanosheets. It was observed that the Ni nanocatalysts exhibited markedly better low-temperature performance than commercial catalysts in the syngas methanation. At 250 °C, 3.0 MPa and a high weight hourly space velocity (WHSV) of 30,000 mL·g−1·h−1, both the CO conversion and the CH4 selectivity reached 100% over the former, while those over the commercial catalyst were only 14% and 76%, respectively. Furthermore, this NiMnAl catalyst exhibited strong anti-carbon and anti-sintering properties at high temperatures. The enhanced low-temperature performance and high-temperature stability originated from the promotion effect of MnOy and the embedding effect of AlOx in the catalyst.
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ZrO 2 -modified Ni/LaAl 11 O 18 catalyst for CO methanation: Effects of catalyst structure on catalytic performance. CHINESE JOURNAL OF CATALYSIS 2018. [DOI: 10.1016/s1872-2067(17)62995-4] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Liu Q, Qiao Y, Tian Y, Gu F, Zhong Z, Su F. Ordered Mesoporous Ni–Fe–Al Catalysts for CO Methanation with Enhanced Activity and Resistance to Deactivation. Ind Eng Chem Res 2017. [DOI: 10.1021/acs.iecr.7b02174] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Qing Liu
- Key
Laboratory of Low Carbon Energy and Chemical Engineering, College
of Chemical and Environmental Engineering, Shandong University of Science and Technology, Qingdao, Shandong 266590, China
- State
Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
| | - Yingyun Qiao
- State
Key Laboratory of Heavy Oil Processing, China University of Petroleum (East China), Qingdao, Shandong 266580, China
| | - Yuanyu Tian
- Key
Laboratory of Low Carbon Energy and Chemical Engineering, College
of Chemical and Environmental Engineering, Shandong University of Science and Technology, Qingdao, Shandong 266590, China
- State
Key Laboratory of Heavy Oil Processing, China University of Petroleum (East China), Qingdao, Shandong 266580, China
| | - Fangna Gu
- State
Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
| | - Ziyi Zhong
- Institute of Chemical and Engineering Sciences, A*star, 1 Pesek Road, Jurong Island, 627833, Singapore
| | - Fabing Su
- State
Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
- Institute
of Industrial Chemistry and Energy Technology, Shenyang University of Chemical Technology, Shenyang, 110142, China
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Barrientos J, Gonzalez N, Boutonnet M, Järås S. Deactivation of Ni/γ-Al2O3 Catalysts in CO Methanation: Effect of Zr, Mg, Ba and Ca Oxide Promoters. Top Catal 2017. [DOI: 10.1007/s11244-017-0812-2] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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