CAJ | 학술논문

考察了CeO2修饰及未修饰的Ni/Mo/SBA- 15催化剂在CH4-CO2重整上的催化性能并采用N2吸脱附、CO2程序升温脱附、H2程序升温还原、傅里叶红外光谱、X射线衍射、扫描电子显微镜和X射线光电子能谱对催化剂进行了表征.结果表明,在常压,800C条件下,经过100 h在线评价后,Ni/Mo/SBA- 15和CeOz/Ni/Mo/SBA- 15催化剂仍具有高的反应活性和规整的六方介孔结构,其中CeO2修饰的CeO2/Ni/Mo/SBA-15催化剂表面没有积炭形成,表明CeO2的加入促进了Ni物种在SBA-15介孔分子筛表面的分散,从而阻止了Ce/Ni/Mo/SBA- 15催化剂上Ni的烧结和积炭.
고찰료CeO2수식급미수식적Ni/Mo/SBA- 15최화제재CH4-CO2중정상적최화성능병채용N2흡탈부、CO2정서승온탈부、H2정서승온환원、부리협홍외광보、X사선연사、소묘전자현미경화X사선광전자능보대최화제진행료표정.결과표명,재상압,800C조건하,경과100 h재선평개후,Ni/Mo/SBA- 15화CeOz/Ni/Mo/SBA- 15최화제잉구유고적반응활성화규정적륙방개공결구,기중CeO2수식적CeO2/Ni/Mo/SBA-15최화제표면몰유적탄형성,표명CeO2적가입촉진료Ni물충재SBA-15개공분자사표면적분산,종이조지료Ce/Ni/Mo/SBA- 15최화제상Ni적소결화적탄.
A Ni/Mo/SBA-15 catalyst was modified with CeO2 and compared with the unmodified catalyst.The catalysts were characterized by N2 adsorption,CO2 temperature-programmed desorption,H2 temperature-programmed reduction,Fourier transform infrared spectrometer,X-ray diffraction,scanning electron microscopy,and X-ray photoelectron spectroscopy.Both the Ni/Mo/SBA-15 and CeO2/Ni/Mo/SBA-15 catalysts gave good catalytic activities at atmospheric pressure.The CeO2 impregnated Ni/Mo/SBA-15 catalyst exhibited excellent stability at 800 ℃ for 100 h on stream,and after the resction,carbon deposits were not formed on the catalyst.The Ni/Mo/SBA-15 and CeO2/Ni/Mo/SBA-1 5 catalysts had a regular hexagonal mesoporous structure.The nickel species and the Ce-Mo oxide components were all in the SBA-15 mesopores.This prevented carbon deposition and sintering of the nickel species in the CeO2/Ni/Mo/SBA-15 catalyst.