Synthesis of Activated Carbon from Coal for Enhancing Hydrogen Content in Syngas from Co-gasification of Rice Husk and Coal

摘要

Hydrogen-rich syngas either from nonrenewable or renewable sources plays a key role for fulfilling the future energy demand. The CO_2 sorbent, activated carbon, synthesized from coal was studied and introduced into the process of co-gasification rice husk with coal. The research was conducted in the continuous gasification reactor with a capacity of 5 kg/h. The raw material used was rice husk and coal while the mass concentration of rice husk was varied at 0%, 25%, 50%, 75%, and 100%. The steam as a gasification agent was maintained at temperatures of 400°C and 500°C. The effect of coal, steam temperature, and activated carbon to enrich hydrogen in the syngas was disclosed. The synergistic effect of enhancing hydrogen content in the syngas from the cogasification was found the mass concentration of coal around 50%. This paper found also the characteristic of activated carbon to increase the concentration of hydrogen in the syngas and the suggestions for improving them were proposed.