TY - JOUR
T1 - High-performance Ni-CeAlO3-Al2O3/FeCrAl-fiber catalyst for catalytic oxy-methane reforming to syngas
AU - Zhao, Guofeng
AU - Chai, Ruijuan
AU - Zhang, Zhiqiang
AU - Sun, Weidong
AU - Liu, Ye
AU - Lu, Yong
N1 - Publisher Copyright:
© 2019 Elsevier Ltd
PY - 2019/12/15
Y1 - 2019/12/15
N2 - A thin-sheet Ni-CeAlO3-Al2O3/FeCrAl-fiber to be used in the COMR process was fabricated by thermally decomposing the catalyst precursor of NiAl-LDHs/FeCrAl-fiber to form the NiO-Al2O3/FeCrAl-fiber, followed by CeO2-modification and H2-reduction. Pre-mounting a γ-Al2O3 layer onto the FeCrAl-fiber is particularly critical for the hydrothermal growth of LDHs along with the fiber surface. The most promising catalyst, with 5 wt% Al2O3, 5 wt% Ni, and 2 wt% CeO2, exhibits high activity, high selectivity, and particularly prolonged stability. At a gas hourly space velocity of 100 L g−1 h−1 and 700 °C, CH4 conversion and H2/CO selectivity can be stably maintained at ~86% and ~96.1/~91.5% for a feed gas with CH4/O2 molar ratio of 2.0/1.0 during 350 h test, in nature, due to the enhanced Ni-sintering and improved carbon resistance. The existence of “CeAlO3-CeO2” cycle enables the catalyst with high carbon resistance because of the intensified C-elimination to inhibit filaments growth.
AB - A thin-sheet Ni-CeAlO3-Al2O3/FeCrAl-fiber to be used in the COMR process was fabricated by thermally decomposing the catalyst precursor of NiAl-LDHs/FeCrAl-fiber to form the NiO-Al2O3/FeCrAl-fiber, followed by CeO2-modification and H2-reduction. Pre-mounting a γ-Al2O3 layer onto the FeCrAl-fiber is particularly critical for the hydrothermal growth of LDHs along with the fiber surface. The most promising catalyst, with 5 wt% Al2O3, 5 wt% Ni, and 2 wt% CeO2, exhibits high activity, high selectivity, and particularly prolonged stability. At a gas hourly space velocity of 100 L g−1 h−1 and 700 °C, CH4 conversion and H2/CO selectivity can be stably maintained at ~86% and ~96.1/~91.5% for a feed gas with CH4/O2 molar ratio of 2.0/1.0 during 350 h test, in nature, due to the enhanced Ni-sintering and improved carbon resistance. The existence of “CeAlO3-CeO2” cycle enables the catalyst with high carbon resistance because of the intensified C-elimination to inhibit filaments growth.
KW - Carbon resistance
KW - Catalytic oxy-methane reforming
KW - Layered double hydroxides
KW - Ni-based catalysts
KW - Structured catalysts
KW - Synthesis gas
UR - https://www.scopus.com/pages/publications/85071848278
U2 - 10.1016/j.fuel.2019.116102
DO - 10.1016/j.fuel.2019.116102
M3 - 文章
AN - SCOPUS:85071848278
SN - 0016-2361
VL - 258
JO - Fuel
JF - Fuel
M1 - 116102
ER -