松木屑在氧气-水蒸气-二氧化碳氛围下的气化模拟研究

doi:10.3969/j.issn.1673-5854.2017.03.003

Abstract

Abstract: Using Aspen Plus software,a model was developed to simulate the gasification of pine sawdust with steam-oxygen-carbon dioxide as gasifying agent. At first,the model was verified by the data of literature and the results showed that the model was reliable. And then,the effects of gasification temperature,oxygen equivalence ratio(c_ER),the mass ratio of steam to biomass(m_S/m_B) as well as the mass ratio of carbon dioxide to biomass(m_CO₂/m_B) on gas composition,low heating value,yield,gasification efficiency and H/C ratio(n_H₂/n_CO) in the produced gas were studied. The low heating value,yield,gasification efficiency and H/C ratio of the produced gas reached 7.45MJ/m³,1.78m³/kg,73.3%,1.79 respectively under the optimum reaction conditions of 850℃,101.325kPa,c_ER=0.2,m_S/m_B=1,m_CO₂/m_B=0.6. Higher gasification temperature was favorable to the process of biomass gasification. With the increased c_ER,the low heating value,gas yield and gasification efficiency decreased rapidly,while H/C ratio was basically keeping stable. The amount of steam added into gasification agent enhanced H₂ content in the produced gas;while appropriate amount of CO₂ added would improve the CO content. Therefore,either of the above two measures could effectively adjust the H/C ratio in the produced gas.

Key words: biomass gasification, simulation, Aspen Plus, gasification agent

CLC Number:

TQ35

CAO Binqi, LIU Yunquan, WANG Duo. Simulation of Pine Sawdust Gasification with Oxygen,Steam and Carbon Dioxide as Gasifying Agents[J]. bce, 2017, 51(3): 14-20.

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Simulation of Pine Sawdust Gasification with Oxygen,Steam and Carbon Dioxide as Gasifying Agents

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