摘要
为了优化生物质气化制甲醇系统,寻找系统最佳运行工况,使用Aspen Plus对生物质气化、变换、氧化钙脱碳、制甲醇系统进行了模拟、计算和评估。系统使用稻壳作为原料,纯氧和水蒸气作为气化剂,探究了气化反应温度、氧气用量比值(ER)和水气比对各反应器出口气体组成和流量、气化炉冷煤气效率、合成气氢碳比、甲醇和水蒸气产量的影响。结果表明:系统最优工况为ER 0.275、气化炉温度850℃、水气比值0.1,此时消耗100 kg/h稻壳,可产生42.63 kg/h甲醇和151.82 kg/h的水蒸气,冷煤气效率为77.78%,合成气氢碳比值为1.89。同样条件下当调节水气比值为0.3时,脱碳冷凝后的气体中H2纯度可达82.47%。因此,可以通过调节水气比,实现生物质绿色甲醇和绿氢的多生产模式。
To optimize the biomass gasification to methanol system and identify the optimal operating conditions,Aspen Plus was utilized to simulate,calculate,and evaluate the biomass gasification,shift reaction,calcium oxide decarbonization,and methanol synthesis processes.The system employed rice husk as the feedstock and pure oxygen along with steam as the gasifying agents.The study investigated the effects of gasification reaction temperature,oxygen-to-biomass ratio(ER),and steam-to-biomass ratio on the composition and flow rate of the exit gases from each reactor,the cold gas efficiency of the gasifier,the hydrogen-to-carbon ratio of the syngas,and the production rates of methanol and steam.The results indicated that the optimal operating conditions for the system were an ER of 0.275,a gasifier temperature of 850℃,and a steam-to-biomass ratio of 0.1.Under these conditions,consuming 100 kg/h of rice husk yielded 42.63 kg/h of methanol and 151.82 kg/h of steam,with a cold gas efficiency of 77.78%and a syngas hydrogen-to-carbon ratio of 1.89.When the steam-to-biomass ratio was adjusted to 0.3,the purity of H2 in the gas after decarbonization and condensation reached 82.47%.Therefore,by adjusting the steam-to-biomass ratio,it is possible to achieve a multi-production mode for green methanol and green hydrogen from biomass.
作者
崔东旭
徐越
卫俊涛
刘现宁
李津津
陈登宇
CUI Dongxu;XU Yue;WEI Juntao;LIU Xianning;LI Jinjin;CHEN Dengyu(College of Materials Science and Engineering,Nanjing Forestry University,Nanjing 210037,China;Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education,School of Energy and Environment,Southeast University,Nanjing 210096,China)
出处
《林产化学与工业》
北大核心
2025年第5期29-35,共7页
Chemistry and Industry of Forest Products
基金
国家自然科学基金资助项目(52076112)
东南大学能源热转换及其过程测控教育部重点实验室开放基金(无编号)。
关键词
生物质气化
气化温度
氧气用量比
甲醇
biomass gasification
gasification temperature
oxygen equivalent ratio
methanol
作者简介
崔东旭(1995-),男(满族),辽宁铁岭人,讲师,博士,主要从事生物质气化-固体氧化物燃料电池研究工作;通讯作者:陈登宇,教授,博士生导师,研究领域为生物质热解多联产,E-mail:chendy@njfu.edu.cn。
