摘要
通过无模板剂一锅法制备出一种具有较大比表面积和孔容的介孔Ni-CaO-ZrO2催化剂,并将其用于CH4-CO2重整反应过程。利用N2吸附-脱附(BET)、SEM、TEM、X射线粉末衍射(XRD)、程序升温还原(H2-TPR)以及热重(TG)等手段对催化剂进行了表征。结果表明,该催化剂具有较强的金属-载体相互作用,这种强金属-载体相互作用(SMSI)使Ni与载体紧密接触,有利于吸附物种在界面进行快速反应,使催化剂在反应过程中具有较高的反应活性和稳定性。虽然反应后的催化剂表面有一定量的积炭生成,但这些积炭多以丝状碳为主,并不会覆盖催化剂的活性位点。
A novel mesoporous Ni-CaO-ZrO2 catalyst with high surface area and pore volume was prepared by one-pot template-free method and applied in CH4-CO2 reforming. The mesoporous Ni-CaO-ZrO2 catalyst was characterized by means of nitrogen sorption, SEM, TEM, XRD, HE-TPR and TG-DSC. The results indicated that a strong metal support interaction （SMSI） present in the Ni-CaO-ZrO2 catalyst induces an intimate contact between Ni and ZrO2 nano-particles, which is favorable for the surface reaction of adsorbed reactant species for CH4-CO2 reforming. Owing to the mesoporous framework and SMSI, the Ni-CaO-ZrO2 catalyst shows promising activity and stability in CH4-CO2 reforming. Most of the carbonaceous deposits on the catalyst surface are in whisker form, which does not cover the active sites and then has little influence on the catalyst stability.
出处
《燃料化学学报》
EI
CAS
CSCD
北大核心
2013年第10期1204-1209,共6页
Journal of Fuel Chemistry and Technology
基金
国家重点基础研究发展规划(973计划
2011CB201405)
国家自然科学基金(21203230)
山西省自然科学基金(2012021005-5)
关键词
无模板剂
一锅法
镍基催化剂
甲烷重整
介孔
二氧化碳
template-free
one-pot
nickel-based catalyst
methane reforming
mesoporous catalyst
carbondioxide
作者简介
联系作者：魏伟（1971-），山东临沂人，研究员，Tel：03514049612，E-mail：weiwei@sxicc．ac．cn。
