Fabrication of CaO-Based Sorbents for CO2 Capture by a Mixing Method

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• 作者：Changlei Qin ; Wenqiang Liu ; Hui An ; Junjun Yin ; Bo Feng
• 刊名：Environmental Science & Technology (ES&T)
• 出版年：2012
• 出版时间：February 7, 2012
• 年：2012
• 卷：46
• 期：3
• 页码：1932-1939
• 全文大小：505K
• 年卷期：v.46,no.3(February 7, 2012)
• ISSN：1520-5851

文摘

Three types of sorbent were fabricated using various calcium and support precursors via a simple mixing method, in order to develop highly effective, durable, and cheap CaO-based sorbents suitable for CO₂ capture. The sorption performance and morphology of the sorbents were measured in a thermogravimetric analyzer and a scanning electron microscopy, respectively. The experimental results indicate that cement is a promising low-cost support precursor for contributing to the enhancement of cyclic CO₂ sorption capacity, especially when organometallic calcium precursors were used. A sorbent (with 75% CaO content) made from calcium l-lactate hydrate and cement showed the highest CO₂ sorption capacity of 0.36 g of CO₂/g of sorbent and its capacity decreased only slightly after 70 cycles of carbonation and calcination.