以"膨胀-酸化"改性处理蛭石（VTM）制备的二维层状多孔纳米片（EXVTM-SiO₂）为载体，采用浸渍法制备负载量不同的Ni/EXVTM-SiO₂催化剂用于甲烷重整反应。通过BET、XRD、XRF、SEM、H₂-TPR、TEM、TG等对催化剂进行表征，在常压750℃条件下进行300 min稳定性实验。结果表明，10% Ni/EXVTM-SiO₂表现出较好的催化活性及稳定性，其CO₂、CH₄的初始转化率分别为92%、55%。这主要是由于10% Ni/EXVTM-SiO₂催化剂具有大的比表面积、较好的金属分散性，从而使催化剂具有一定的抗积碳和抗烧结性。

Vermiculite (VTM) is modified by "expansion-acidification" to prepare two-dimensional layered porous nanosheets (EXVTM-SiO₂),which are used as support to prepare Ni/EXVTM-SiO₂ catalysts with different loading amounts for methane reforming reaction by means of impregnation method.The catalysts are characterized by BET,XRD,XRF,SEM,H₂-TPR,TEM and TG techniques,and the stability experiment for the catalysts has been carried out under atmospheric pressure at 750℃ for 300 min.Experimental results show that 10%Ni/VTM-SiO₂ exhibits a better catalytic activity and stability,over which the initial conversion rates of CO₂ and CH₄ are 92% and 55%,respectively.The main reason is that 10%Ni/EXVTM-SiO₂ catalyst has a larger specific surface area and better metal dispersion,so that it has a certain degree of carbon deposition and sintering resistance.

孟昭俊(1992-),男,硕士研究生,研究方向为工业催化,mengzhaojun_stu@163.com