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作者:

Chen, Hui (Chen, Hui.) | Sun, Wenjing (Sun, Wenjing.) | Hu, Xiaomin (Hu, Xiaomin.) | Wang, Qi (Wang, Qi.) | Wu, Tong (Wu, Tong.) | An, Shuang (An, Shuang.) | Ding, Chenyu (Ding, Chenyu.) | Chen, Congmei (Chen, Congmei.) | Huang, Lihong (Huang, Lihong.) | Wang, Ning (Wang, Ning.)

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EI Scopus SCIE

摘要:

Nickel-based catalysts exhibit excellent initial activity in the auto-thermal reforming (ATR) of acetic acid (HAc) to produce hydrogen; meanwhile, deactivation issues, namely oxidation, sintering and carbon deposition, have not been fully addressed. Hence, we prepared a series of Ni-W/SiO2 catalysts and found the Ni-2W/SiO2 catalyst with 2 wt% W decoration presented the best catalytic activity and stability: the conversion rate of acetic acid was stable at 100 %, and the hydrogen yield remained at 2.8 mol-H2/mol-HAc with neither sintering nor carbon deposition. The excellent catalytic performance of Ni-2W/SiO2 was analyzed and can be attributed to the special properties of WO2 as followed: First, during the ATR process, WO2 species migrated to the surface of Ni phase and formed an interface, which resulted in strong interaction of WO2-Ni and relieved carbon deposition and sintering of Ni species; Second, the effect of electron donor by WO2 species on the WO2-Ni interface during the reduction procedure was found and preserved a stable proportion of Ni0 active species during the ATR process; Third, DFT and in-situ DRIFTS confirmed that CH3COOH tends to be enriched on the WO2 species of the WO2/Ni(1 1 1) interface rather than on the Ni(1 1 1) surface, promoting the adsorption and dehydrogenation of CH3COOH to intermediates of CH3COO* and H*, which is difficult to occur on WO3 species of the WO3/Ni(1 1 1) interface because of high reaction barrier.

关键词:

Nickel Auto-thermal reforming Tungsten oxide Interface effect Acetic acid

作者机构:

  • [ 1 ] [Hu, Xiaomin]Beijing Univ Technol, Fac Environm & Life, Beijing 100124, Peoples R China
  • [ 2 ] [Wang, Ning]Beijing Univ Technol, Fac Environm & Life, Beijing 100124, Peoples R China
  • [ 3 ] [Chen, Hui]Chengdu Univ Technol, State Key Lab Geohazard Prevent & Geoenvironm Prot, Chengdu 610059, Peoples R China
  • [ 4 ] [An, Shuang]Chengdu Univ Technol, State Key Lab Geohazard Prevent & Geoenvironm Prot, Chengdu 610059, Peoples R China
  • [ 5 ] [Ding, Chenyu]Chengdu Univ Technol, State Key Lab Geohazard Prevent & Geoenvironm Prot, Chengdu 610059, Peoples R China
  • [ 6 ] [Huang, Lihong]Chengdu Univ Technol, State Key Lab Geohazard Prevent & Geoenvironm Prot, Chengdu 610059, Peoples R China
  • [ 7 ] [Chen, Hui]Chengdu Univ Technol, Dept Chem & Pharmaceut Engn, Chengdu 610059, Peoples R China
  • [ 8 ] [Huang, Lihong]Chengdu Univ Technol, Dept Chem & Pharmaceut Engn, Chengdu 610059, Peoples R China
  • [ 9 ] [Sun, Wenjing]Guangdong Med Univ, China Amer Canc Res Inst, Key Lab Med Mol Diagnost Guangdong Prov, Dongguan 523808, Guangdong, Peoples R China
  • [ 10 ] [Wang, Qi]Huaneng Clean Energy Inst, Beijing 102209, Peoples R China
  • [ 11 ] [Wu, Tong]Huaneng Clean Energy Inst, Beijing 102209, Peoples R China
  • [ 12 ] [Chen, Congmei]Shenzhen Cloud Comp Ctr, Natl Supercomp Ctr Shenzhen, Shenzhen 518055, Peoples R China

通讯作者信息:

  • [Wang, Ning]Beijing Univ Technol, Fac Environm & Life, Beijing 100124, Peoples R China;;[Huang, Lihong]Chengdu Univ Technol, State Key Lab Geohazard Prevent & Geoenvironm Prot, Chengdu 610059, Peoples R China;;[Huang, Lihong]Chengdu Univ Technol, Dept Chem & Pharmaceut Engn, Chengdu 610059, Peoples R China;;

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来源 :

FUEL

ISSN: 0016-2361

年份: 2023

卷: 339

7 . 4 0 0

JCR@2022

ESI学科: ENGINEERING;

ESI高被引阀值:19

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