| 生物炭技术缓解我国温室效应潜力初步评估 |
| 摘要点击 3083 全文点击 1920 投稿时间：2012-09-25 修订日期：2012-11-23 |
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| 中文关键词 生物炭 农林生物质资源 温室效应潜力 土壤封存 初步评估 生命周期评价 |
| 英文关键词 biochar agriculture and forestry biomass resource greenhouse effect potential soil sequestration preliminary assessment life cycle assessment |
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| 中文摘要 |
| 热解制备的生物炭在实现了将植物吸收的大气CO2封存在土壤中的同时,还将产生多重农业生产效应.在调查我国农林废弃物资源可利用潜力的基础上,利用生命周期评价(life cycle assessment, LCA)方法对热解生物炭技术在缓解温室效应方面的潜力进行了初步评估.研究表明,我国每年可供生物炭生产的农林生物质资源总量为6.04×108 t; 温室效应净潜力(以CO2e计,CO2e为CO2当量)为5.32×108 t,相当于每t原料可封存0.88 t.在整个温室效应潜力中,贡献最大的是大气CO2以生物炭形式在土壤中的封存,约为73.94%,其次是副产物可更新能源生产所产生的温室效应潜力,占总潜力的23.85%.由此可见,以农林废弃生物质资源为原料热解制备生物炭的技术对于缓解我国严峻的温室气体排放压力具有巨大的潜力. |
| 英文摘要 |
| The production of biochar by pyrolysis and its application to soil can sequester the CO2 which was absorbed by plants from atmosphere into soil, in addition it can also bring multiple benefits for agriculture production. On the basis of the available potential survey of the biomass residues from agriculture and forestry section, life cycle assessment was employed to quantify the potential of biochar technology in mitigation of greenhouse gases in our country. The results showed: In China, the amount of available biomass resource was 6.04×108 t every year and its net greenhouse effect potential was 5.32×108 t CO2e(CO2e∶CO2 equivalent), which was equivalent to 0.88 t CO2e for every ton biomass. The greatest of contributor to the total potential was plant carbon sequestration in soil as the form of biochar which accounts for 73.94%, followed by production of renewable energy and its percentage was 23.85%. In summary, production of biochar from agriculture and forestry biomass residues had a significant potential for our country to struggle with the pressure of greenhouse gas emission. |
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