Hydrogen production from steam pyrolysis-gasification of sugarcane leaves with sorbent-catalysts

In this work,the hydrogen production during biomass steam pyrolysis-gasification with a combined catalysts and sorbent. the biomass sample was originated from sugarcane leaves. the combined catalyst and sorbent (nio-mgo-cao/γ-al2o3) was prepared by an excess-solution impregnation method and the property of fresh and used catalysts was characterized using xrd. the prepared sorbent-catalysts promoted both tar reforming and co2 absorption. high hydrogen production was achieved due to the enhanced water–gas shift reaction by the latter. the pyrolysis-gasification experiments were conducted in a drop tube two-stage fixed bed reactor. the effect of operating parameters such as the amount of mgo (3,5 and 10 wt.%) and cao (3,5 and 10 wt.%) on supported catalysts and the gasification temperatures (600,700 and 800 °c) were investigated. it was found that the highest hydrogen yield of 23.2 mmol h2/gbiomass was attained using the ni10mg5ca5 catalyst at the gasification temperature of 600 °c. however,the maximum of tar conversion was observed around 78 wt.% at gasification temperature up to 800 °c. © 2016 penerbit utm press. all rights reserved.