期刊
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
卷 1, 期 8, 页码 903-909出版社
AMER CHEMICAL SOC
DOI: 10.1021/sc300150k
关键词
Carbonation; Calcination; Eggshell; CaO sorbents; CO2 capture; Sustainable engineering
资金
- Ohio State University Undergraduate Engineering Honors Research Scholarship
Eggshell waste, which contains 95% calcium carbonate (CaCO3), presents itself as an inexpensive calcium-based sorbent for removal of carbon dioxide (CO2) in combustion streams used to generate electricity. The utilization of eggshell waste in CO2 capture via cyclic carbonation-calcination reactions (CCR) was investigated in this work. Using thermogravimetric analysis, the CO2 capture capacity for multiple acetic acid pretreated eggshell samples was studied. This pretreatement generates a mesoporous structure, allowing the eggshell-derived sorbent to reach higher conversions over more CCR cycles while also removing the eggshell's protein-rich membrane. Six acetic acid treatments were also explored for regeneration of spent sorbents after multiple cycles. The regeneration of spent sorbents with acetic acid provided a 38% improvement in CaO untreated shells after ten cycles. The eggshell membrane contained highly valuable Type X collagen, which can be recovered through the course of shell pretreatment to increase process feasibility. This scheme allows for sustainable generation of CaO sorbents while also transforming a current waste material into a value-added product.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据