| 摘要: |
| 【目的】研究秸秆沼气化利用过程中温室气体的排放，判断我国沼气事业的发展潜力。【方法】简述了碳足迹的内涵，构建了农作物秸秆产量和沼气潜力的碳足迹模型，确定了标准煤、秸秆直接燃烧、沼气燃烧的碳足迹参数，在此基础上计算了我国2011年的沼气潜力并对秸秆沼气化的碳足迹进行了分析。【结果】农作物秸秆直接燃烧的碳足迹参数为1.31 kg/kg，标准煤燃烧产生的碳足迹参数2.63 kg/kg，沼气燃烧减少的碳足迹参数为3.1 kg/m3。2011年全国的农作物秸秆产量约为9.7亿t，若将其中36.4%的粮食作物、油料作物秸秆进行沼气发酵，则产生的沼气量为1 135.6亿m3，其沼气燃烧能够减少3.5亿t的CO2排放。【结论】秸秆沼气化利用能够明显减少温室气体的排放，其发展潜力巨大。 |
| 关键词: 秸秆 沼气化 碳足迹 |
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| 基金项目:国家“十二五”科技支撑计划项目（2011BAD15B03） |
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| The carbon footprint analysis of straw biogas utilization of China in 2011 |
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ZHANG Ting-ting,FENG Yong-zhong,LI Chang-zhen,et al
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| Abstract: |
| 【Objective】This research analyzed the emissions of greenhouse gas in the process of straw biogas utilization and discussed the development potential of biogas industry in China.【Method】This article expounded the connotation of carbon footprint,constructed the carbon footprint models for crops straw yield and methane potential,and determined the carbon footprint parameters for standard coal,straw burning and biogas burning.Then,the biogas potential of China in 2011 was calculated and the carbon footprint of straw biogas utilization was analyzed.【Result】The carbon footprint parameters of straw direct burning,coal burning were 1.31 and 2.63 kg/kg.The reduced carbon footprint parameter of biogas buring is 3.1 kg/m3.In 2011,the total crops straw in China was 970 million ton.If grain crop and oil crop straws,which accounted for 36.4% of total straw,were used for biogas generation,113.56 billion m3 biogas would be generated and could reduce 350 million ton CO2 emissions.【Conclusion】The straw biogas utilization can significantly reduce the emissions of greenhouse gases.Thus,it has great development potential in China. |
| Key words: straw the straw of biogas utilization the carbon footprint |
