芦竹氧气-水蒸气气化特性研究OA

The oxygen-steam gasification experiment was carried out in a vertical tube furnace using Arundo donax as raw material.The effects of oxygen dosage ratio,mass ratio of steam to biomass(mS/mB)and gasification temperature on syngas composition and gasification characteristics were studied.The results showed that with the increase of oxygen dosage ratio or mS/mB value,the volume fraction of H2,gas production rate,low calorific value of syngas,carbon conversion rate and gasification efficiency first increased and then decreased,while the volume fraction of CO decreased continuously.With the increase of gasification temperature,the volume fractions of H2 and CO,gas production rate and gasification efficiency increased,and the coke production rate decreased.When the oxygen dosage ratio was 0.25-0.35,mS/mB value was 0.6-0.7,and the gasification temperature range was 800-850℃,the absolute hydrogen yield of oxygen-steam gasification of A.donax was the best.Compared with steam gasification and oxygen gasification,oxygen-steam combined gasification was more suitable for the preparation of hydrogen and methanol.