DEVELOPMENT OF SIO2 SUPPORTED NICKEL BASED CATALYSTS BY COMPLEXATION WITH ORGANIC MOLECULES FOR CO2 REFORMING OF CH4

Abstract

Dry reforming of methane (DRM) is environmentally benign because of the concern towards greenhouse effects. Besides the transformation of greenhouse gases, syngas (mixture of CO and H2) produced can be applied in many downstream processes. Deactivation caused by carbon deposition and metal sintering hinders the industrilization of Ni-based catalysts. To develop a anti-coking and -sintering Ni-based catalyst, metal size is reduced and metal-support interaction (MSI) is enhanced. Firstly, alkyl-amines with different carbon chain lengths are studied and oleylamine (OAm) produces the smallest size and strongest MSI. Secondly, concentration of OAm is optimized and catalyst formation mechanism with OAm is proposed. Thirdly, oleic acid (OAc) is added to form organic pair OAm/OAc, which performs much better than OAm or OAc alone. Fourthly, Ni-Co bimetallic catalyst combined with OAm/OAc organic pair is developed, which is very promising for DRM and other reactions operated at a wide range of temperatures.