李海燕,肖军,沈来宏,袁言言.生物质热解加氢制汽柴油系统的火用分析[J].,2015,14(3):230-238 |
生物质热解加氢制汽柴油系统的火用分析 |
Exergy Analysis of Transportation fuels production via Biomass Fast Pyrolysis and Hydroprocessing |
投稿时间:2014-11-25 修订日期:2015-01-19 |
DOI:10.13738/j.issn.1671-8097.2015.03.010 |
中文关键词: 生物质 汽柴油 热解 加氢 火用分析 |
英文关键词: biomass transportation fuels fast pyrolysis hydroprocessing exergy analysis |
基金项目:国家重点基础研究发展计划(973计划) |
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中文摘要: |
基于生物质热解加氢制汽柴油系统的Aspen Plus模拟,分析了全系统碳氢氧元素的平衡转化过程,并基于火用理论对全系统及各单元进行了用能分析,研究了重整温度和氢利用率对系统火用效率的影响。结果表明:模拟条件下汽柴油产率为0.122 kg/kg生物质(干基);生物质碳的24.74%转化到汽柴油;转化到汽柴油的氢占实际总氢消耗的19.85%;加氢过程生物油氧38.2%以CO2脱除,其余以H2O脱除。全系统总火用效率(η )和产品火用效率(η-)分别为59.9%和32.8%;全系统火用损以内部不可逆火用损为主,比例达约30%,热解单元是全系统火用损最大的部位。重整最佳温度为750℃~800℃;系统自供氢条件下,η 和η-所能达到的最大值分别为63.1%和42.6%。 |
英文摘要: |
Based on the simulation of transportation fuels (BTPF) production via biomass fast pyrolysis and hydroprocessing using Aspen Plus, the flow balance of carbon, hydrogen, and oxygen as well as the exergy analysis of BTPF production system is carried out. Moreover the effects of sensitivities of parameters on the exergy efficiency are studied. The results indicate that the yield of BTPF is 0.122 kg/kg dry biomass and the atom utilization efficiency of carbon form the biomass to BTPF is 24.74%, while19.85% of the total hydrogen actual consumed is converted into BTPF. As for the total oxygen in bio-oil, nearly 38.2% is removed as CO2, and the rest is eliminated in the form of H2O. The exergy efficiencies of the system (η ) is 59.9%, while the exergy efficiencies form biomass to BTPF (η-) is 32.8%. The exergy loss of the whole system is mainly caused by the internal irreversibility, the βEx of which accounts for nearly 30% and the largest exergy loss occurs in the pyrolysis subsystem. In addition, the reforming temperature of 750℃ to 800℃ is optimal, and the maximum of η as well as η- can reach 63.1% and 42.6% separately with the hydrogen supply by itself. |
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