Competing uses for China's straw: the economic and carbon abatement potential of biochar
文献类型：期刊论文
| 作者 | Clare,Abbie; Shackley,Simon; Joseph,Stephen; Hammond,James; Pan,Genxing; Bloom,Anthony |
| 刊名 | GLOBAL CHANGE BIOLOGY BIOENERGY
 |
| 出版日期 | 2015-11-01 |
| 卷号 | 7期号:6页码:1272-1282 |
| 关键词 | biochar bioenergy biomass briquetting China gasification pyrolysis |
| 英文摘要 | China is under pressure to improve its agricultural productivity to keep up with the demands of a growing population with increasingly resource-intensive diets. This productivity improvement must occur against a backdrop of carbon intensity reduction targets, and a highly fragmented, nutrient-inefficient farming system. Moreover, the Chinese government increasingly recognizes the need to rationalize the management of the 800 million tonnes of agricultural crop straw that China produces each year, up to 40% of which is burned in-field as a waste. Biochar produced from these residues and applied to land could contribute to China's agricultural productivity, resource use efficiency and carbon reduction goals. However competing uses for China's straw residues are rapidly emerging, particularly from bioenergy generation. Therefore it is important to understand the relative economic viability and carbon abatement potential of directing agricultural residues to biochar rather than bioenergy. Using cost-benefit analysis (CBA) and life-cycle analysis (LCA), this paper therefore compares the economic viability and carbon abatement potential of biochar production via pyrolysis, with that of bioenergy production via briquetting and gasification. Straw reincorporation and in-field straw burning are used as baseline scenarios. We find that briquetting straw for heat energy is the most cost-effective carbon abatement technology, requiring a subsidy of $7 MgCO(2)e(-1) abated. However China's current bioelectricity subsidy scheme makes gasification (NPV $12.6 million) more financially attractive for investors than both briquetting (NPV $7.34 million), and pyrolysis ($-1.84 million). The direct carbon abatement potential of pyrolysis (1.06 MgCO(2)e per odt straw) is also lower than that of briquetting (1.35 MgCO(2)e per odt straw) and gasification (1.16 MgCO(2)e per odt straw). However indirect carbon abatement processes arising from biochar application could significantly improve the carbon abatement potential of the pyrolysis scenario. Likewise, increasing the agronomic value of biochar is essential for the pyrolysis scenario to compete as an economically viable, cost-effective mitigation technology. |
| 类目[WOS] | Agronomy ; Biotechnology & Applied Microbiology ; Energy & Fuels |
| 研究领域[WOS] | Agriculture ; Biotechnology & Applied Microbiology ; Energy & Fuels |
| 关键词[WOS] | LIFE-CYCLE ASSESSMENT ; ORGANIC-CARBON ; BLACK CARBON ; CROP PRODUCTIVITY ; CONTAMINATED SOILS ; POWER-GENERATION ; USE EFFICIENCY ; CLIMATE-CHANGE ; FOOD SECURITY ; RURAL CHINA |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000362834200008 |
| 源URL | [http://ir.kib.ac.cn/handle/151853/25193]  |
| 专题 | 昆明植物研究所_中国科学院东亚植物多样性与生物地理学重点实验室 |
| 推荐引用方式 GB/T 7714 | Clare,Abbie,Shackley,Simon,Joseph,Stephen,et al. Competing uses for China's straw: the economic and carbon abatement potential of biochar[J]. GLOBAL CHANGE BIOLOGY BIOENERGY,2015,7(6):1272-1282. |
| APA | Clare,Abbie,Shackley,Simon,Joseph,Stephen,Hammond,James,Pan,Genxing,&Bloom,Anthony.(2015).Competing uses for China's straw: the economic and carbon abatement potential of biochar.GLOBAL CHANGE BIOLOGY BIOENERGY,7(6),1272-1282. |
| MLA | Clare,Abbie,et al."Competing uses for China's straw: the economic and carbon abatement potential of biochar".GLOBAL CHANGE BIOLOGY BIOENERGY 7.6(2015):1272-1282. |
入库方式： OAI收割
来源：昆明植物研究所
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