Emissions of CO2 from biomass production and transportation in agriculture and forestry
Emissions of CO2 from biomass production and transportation in agriculture and forestry
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DOI：
10.1016/0196-8904(95)00326-6
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发表时间：
1996-06-01
影响因子：
10.4
通讯作者：
Borjesson, PII
中科院分区：
文献类型：
--
作者：
Borjesson, PII
使用化石燃料能源投入，计算了瑞典农业和林业生产和运输生物质的二氧化碳净排放量。还分析了从以化石燃料为基础的能源系统向以二氧化碳为中性的生物质系统过渡将如何影响生物质生产和运输的能效。短轮伐林(Salix)、秸秆和伐木残留物的生产和运输显示出每单位能量排放的最低二氧化碳排放量，相当于多年生LE作物的50%左右和一年生粮食作物的10%至30%。与煤炭完整燃料循环的二氧化碳排放量相比，使用化石燃料投入时，沙柳生产(包括用卡车运输50公里)产生的二氧化碳净排放量低35至40倍。在以化石燃料为基础的能源系统中，未来产量的增加和技术发展预计将在2015年左右将生物质生产产生的二氧化碳净排放量减少30%至50%。从以化石燃料为基础的能源系统过渡到以二氧化碳为中性的生物质能源系统，估计将使生物质生产和运输的能源投入分别增加约40%和20%，导致生物质生产(包括运输)的净能量输出减少约4%。
Net CO2 emissions have been calculated for the production and transportation of biomass in Swedish agriculture and forestry, using fossil-fuel-based energy inputs. An analysis of how a transition from a fossil-fuel-based energy system to a CO2-neutral biomass-based system would affect the energy efficiency in biomass production and transportation, has also been carried out. Production and transportation of short-rotation forest (Salix), straw, and logging residues exhibited the lowest CO2 emissions per unit energy delivered, equal to about 50% of those from perennial ley crops and 10 to 30% of those from annual food crops. Compared with CO2 emissions from a complete fuel-cycle for coal, net emissions of CO2 from Salix production, including transportation 50 km by truck, are 35 to 40 times lower when fossil-fuel inputs are used. Future increases in yield and technological development are estimated to reduce net CO2 emissions from biomass production by 30 to 50% in a fossil-fuel-based energy system around the year 2015. A transition from a fossil-fuel-based, to a CO2-neutral biomass-based energy system around 2015, is estimated to increase the energy input in biomass production and transportation by about 40% and 20%, respectively, resulting in a decreased net energy output from biomass production (including transportation) by about 4%.