Electrified Cement Production via Anion-Mediated Electrochemical Calcium Extraction

Rui Kai Miao, Ning Wang, Sung Fu Hung, Wen Yang Huang, Jinqiang Zhang, Yong Zhao, Pengfei Ou, Sasa Wang, Jonathan P. Edwards, Cong Tian, Jingrui Han, Yi Xu, Mengyang Fan, Jianan Erick Huang, Yurou Celine Xiao, Alexander H. Ip, Hongyan Liang, Edward H. Sargent*, David Sinton*

*此作品的通信作者

研究成果: Article同行評審

2 引文 斯高帕斯(Scopus)

摘要

Cement production is a carbon-intensive industrial process, with the sector contributing ∼8% of global anthropogenic CO2 emissions. On average, producing each kilogram of cement leads to the emission of 1 kg of CO2─the combination of fuel combustion emissions and carbon released from the feedstock, limestone (CaCO3). Here we report electrochemical cement production based on anion-mediated electrochemical calcium extraction (ECE) that addresses both feedstock and energy emissions. The in situ-generated acidic electrolytes release the feedstock CO2 emissions at high purity, enabling direct carbon utilization or sequestration without costly capture and purification steps. Energy embodied within a separate H2 output stream is sufficient to sinter Ca(OH)2 to produce portland cement, thus removing the CO2 emissions associated with fuel combustion. We then replace CaCO3 with a carbon-free calcium feedstock, gypsum, thereby removing the CO2 emissions embodied in the feedstock. Technoeconomic analysis forecasts that this method could provide a viable, decarbonized cement alternative.

原文English
頁(從 - 到)4694-4701
頁數8
期刊ACS Energy Letters
8
發行號11
DOIs
出版狀態Published - 10 11月 2023

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