Effects of promoters on biomas gasification using nickel

Abstract

This research studied the preparation of Ni catalyst on dolomite support. The performance of an addition of catalyst was evaluated on the steam gasification of coconut shell and palm shell to produce syngas. The effects of parameters, such as calcination temperature, reaction temperature, steam per carbon (S/C) ratio, oxygen flow rate, and types of promoters, were investigated with the purpose of optimizing the gaseous products. The experimental works showed that Ni/Dolomite catalyst efficiently enhanced the refoming reaction and tar cracking. Futhermore, it was found that gaseous products were highly produced at temperature of 800 degrees celsius and (S/C) ratio of 0.95 At this condition, small amount of tar was found. Carbon conversion to gaseous products of coconut shell and palm shell were 81.25% and 78%, respectively. The effects of the types of promoters, such as Platinum, Cobolt, and Iron, on biomass gasification were also evaluated. The areas of interest were the effects of preparation methods which were impregnation and coprecipitation. It was found that catalyst preparation by impregnation method gave superior performance. The conclusion can be drawn from experiments that platinum promoter enhanced refoming reaction, iron promoted water gas shift reaction, and cobolt promoter favored methanation reaction. The addition of metal reduced cafbon deposition on Ni/Dolomite.