Details

Autor(en) / Beteiligte

• Lu, Xi
• Cao, Liang
• Wang, Haikun
• Peng, Wei
• Xing, Jia
• Wang, Shuxiao
• Cai, Siyi
• Shen, Bo
• Yang, Qing
• Nielsen, Chris P.
• McElroy, Michael B.

Titel

Gasification of coal and biomass as a net carbon-negative power source for environment-friendly electricity generation in China

Ist Teil von

• Proceedings of the National Academy of Sciences - PNAS, 2019-04, Vol.116 (17), p.8206-8213

Ort / Verlag

United States: National Academy of Sciences

Erscheinungsjahr

2019

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• Realizing the goal of the Paris Agreement to limit global warming to 2 °C by the end of this century will most likely require deployment of carbon-negative technologies. It is particularly important that China, as the world’s top carbon emitter, avoids being locked into carbon-intensive, coal-fired power-generation technologies and undertakes a smooth transition from high- to negative-carbon electricity production. We focus here on deploying a combination of coal and biomass energy to produce electricity in China using an integrated gasification cycle system combined with carbon capture and storage (CBECCS). Such a system will also reduce air pollutant emissions, thus contributing to China’s near-term goal of improving air quality.We evaluate the bus-bar electricity-generation prices for CBECCS with mixing ratios of crop residues varying from 0 to 100%, as well as associated costs for carbon mitigation and cobenefits for air quality. We find that CBECCS systems employing a crop residue ratio of 35% could produce electricity with net-zero life-cycle emissions of greenhouse gases, with a levelized cost of electricity of no more than 9.2 US cents per kilowatt hour. A carbon price of approximately $52.0 per ton would make CBECCS cost-competitive with pulverized coal power plants. Therefore, our results provide critical insights for designing a CBECCS strategy in China to harness nearterm air-quality cobenefits while laying the foundation for achieving negative carbon emissions in the long run.