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Comparison study on strategies to prepare nanocrystalline Li2ZrO3-based absorbents for CO2 capture at high temperatures

ISSN号：1004-9541
期刊名称：《中国化学工程学报：英文版》
时间：0
分类：TQ174.758[化学工程—陶瓷工业;化学工程—硅酸盐工业] X131[环境科学与工程—环境科学]
作者机构：[1]Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Institute of Physical Chemistry, Zhejiang Normal University, Jinhua 3211004, China
相关基金：The financial supports from the National Basic Research Program of China （2009CB626607）, the National Natural Science Foundation of China （21036006）, the Program for Changjiang Scholars and Innovative Research Team in Chinese Universities （IRT0980）, and the Program for Zhejiang Leading Team of Science and Technology Innovation （2011 R09020-05） are gratefully acknowledged.

作者： Qiang XIAO Xiaodan TANG Yefeng LIU Yijun ZHONG Weidong ZHU[1]

关键词： CO2分压, 捕获性能, 吸收剂, 纳米晶, 高温, 冷冻干燥技术, 二氧化碳分压, 近化学计量比, CO2 capture, citrate, starch, freeze-drying Li2ZrO3, K-doped Li2ZrO3, technique

中文摘要：

比较研究在策略上被进行了因为为 CO2 的综合 nanocrystalline Li2ZrO3 和 Kdoped Li2ZrO3 吸收剂在高温度捕获，包括固态并且液体阶段方法，柠檬酸盐线路，和帮助淀粉的大音阶的第五音胶化方法与 freeze-drying 结合了技术。包括举起率和吸收能力，吸收性质被 thermogravimetric 分析(TGA ) 在不同 CO2 部分压力综合吸收剂调查。nanosized Li2ZrO3 晶体由柠檬酸盐线路展览综合了更快的举起并且一更高，将近， stoichiometric 吸收能力比那些综合了由固态并且液体阶段方法。做 K 进 Li2ZrO3 能显著地改进 CO2 的举起率，特别在低 CO2 部分压力。为做 K 的 Li2ZrO3 的合成，而帮助淀粉的大音阶的第五音胶化方法与 freeze-drying 结合了，柠檬酸盐线路有差的重制度和可伸缩性技术在上面可再现、容易可伸缩，并且因此综合的吸收剂拥有优秀 CO2 俘获性质。

英文摘要：

A comparison study has been conducted on the strategies for synthesizing nanocrystalline Li2ZrO3 and K- doped Li2ZrO3 absorbents for CO2 capture at high temperatures, including solid-state and liquid-phase meth- ods, citrate route, and starch-assisted sol-gel method combined with freeze-drying technique. The absorption properties, including uptake rate and absorption capacity, of synthesized absorbents were investigated by thermo- gravimetric analysis （TGA） at different CO2 partial pressures. The nanosized Li2ZrO3 crystals synthesized by the citrate route exhibit a faster uptake and a higher, nearly stoichiometric absorption capacity than those synthesized by the solid-state and liquid-phase methods. The doping of K into Li2ZrO3 can significantly improve the uptake rate of CO2, especially at low CO2 partial pressures. For the synthesis of K-doped Li2ZrO3, the citrate route has poor reproducibility and scalability, whereas the starch-assisted sol-gel method combined with freeze-drying technique is reproducible and easily scaled up, and the thus synthesized absorbents possess excellent CO2 capture properties.