Kenaf as a Bioresource for Production of Hydrogen-rich Gas

Abstract

The two-step gasification of biomass via carbonization-step followed by steam gasification, which produces hydrogen-rich water gas without any byproducts, was achieved using a small laboratory system. Carbonization of kenaf from 600 to 1000°C produced suitable chars for further steam gasification, which generated clean hydrogenrich gases without any byproducts. On the other hand, carbonization of kenaf at 400°C yielded an insufficient char that still contained raw chemical components, and generated hydrocarbons and tar-like materials during gasification. Importantly, the wood gas generated during carbonization had a sufficient Higher Heating Value (HHV) to serve as the heating source for the gasification. A lower gasification temperature induced the water-gas shift reaction, which led to a change the hydrogen content in the water gas composition. Raising the gasification temperature increased the specific HHV and decreased the gas yield. In addition, at these gasification temperatures, the H 2 concentration in the water gases was greater than 58%, and the H 2 /CO ratio ranged from 1.8 to 3.0. On the other hand, increasing the steam supply rate decreased the specific HHV and CO yield and increased the H 2 and CO 2 yields. Therefore, the water-gas shift reaction played an important role under these conditions. On the basis of all of the above results, it was concluded that the water-gas reaction, C + H 2 O → CO + H 2 , leads to effective gasification of the kenaf char.

Characterization of Japanese cedar bio-oil produced using a bench-scale auger pyrolyzer

“…The non-condensable gases were washed with a wet scrubber and collected in gas bags at 5 L/min. The collected gas was analyzed using a GC/thermal conductivity detector (TCD) GC-7000 (J-science lab) as previously reported (Kojima et al 2014 ). Ultimate analysis of the char was provided by Shimadzu techno-research.…”

Physical Properties of Cement-Sand Brick Made by Kenaf Core: Discovering the Optimal Formulation

“…To support the green technology concept, research on utilizing kenaf core as a by-product is actively carried out by many researchers. Kojima et al [15] study on utilizing kenaf core as a bioresource to produce hydrogen-rich gas. Munirah et al [16] extracted the cellulose from kenaf core to use as a new material to produced membrane filtration and Salisu et al [17] utilizing kenaf core as bio-mop for water remediation from crude oil spill contamination.…”