摘要
基于已有相关研究的数据,利用简化的生命周期分析方法,对秸秆在不同生物质发电系统中,从最初生产到最终被转化利用的过程进行碳循环分析。结果表明:在生物质发电的整个生命周期过程中从大气固定了CO_2;该文中所涉及的3类秸秆,在各发电过程的固碳趋势一致,依次为稻秸>麦秸>玉米秸;在相同发电过程下,获得单位电量的碳排放随发电效率的提高而降低,而固定单位碳量的电力产出则不断增加;同等规模下,气化发电过程产生单位电能的碳排放低于直接燃烧发电过程。
The carbon cycle of different biomass power generation systems, including biomass gasification and power generation system, BIGCC system and biomass combustion and power generation system, was analyzed by a simplified life cycle assessment approach. The analysis was based on three kinds of agricultural residue, i.e. rice stalk, wheat stalk and corn stalk. The results indicate that carbon can be fixed in the whole life cycle of biomass power generation system. The rice stalk fed system shows the highest capacity for fixing carbon, next is the wheat stalk and then the corn stalk. Carbon emission decreases with increasing efficiency of power generation when unit quantity of electricity is obtained. Carbon emission amount of biomass gasification and power generation system is lower than that of direc combustion and power generation system.
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2008年第6期705-710,共6页
Acta Energiae Solaris Sinica
基金
国家高技术研究发展计划(863)项目(010603)
广东省自然科学基金研究团队项目(030045)
关键词
秸秆
碳循环
气化发电
直接燃烧发电
stalk
carbon cycle
gasification ＆ power generation
direct combustion power generation
