Reducing Energy Penalty of CO2 Capture Using Fe Promoted SO42-/ZrO2/MCM-41 Catalyst
Reducing Energy Penalty of CO2 Capture Using Fe Promoted SO42-/ZrO2/MCM-41 Catalyst
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使用 Fe 促进的 SO42-/ZrO2/MCM-41 催化剂减少 CO2 捕集的能量损失
DOI：
10.1021/acs.est.9b01901
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发表时间：
2019
影响因子：
11.4
通讯作者：
Tontiwachwuthikul Paitoon
中科院分区：
文献类型：
--
作者：
Zhang Xiaowen;Zhu Zhiqing;Sun Xiaoyu;Yang Jian;Gao Hongxia;Huang Yangqiang;Luo Xiao;Liang Zhiwu;Tontiwachwuthikul Paitoon
载CO2溶剂再生能耗高是胺法CO2捕集工艺真实的应用的最大障碍。为了降低能耗，制备了3种不同氧化铁含量（5%、10%和15%）的MCM-41（SZMF）负载的Fe促进SO 42-/ZrO 2催化剂，并将其用于98 °C下的乙醇胺富液再生过程。结果表明，使用SZMF极大地提高了CO2解吸性能（即，脱附因子）降低260-388%，并使热负荷降低约28- 40%，这比用于该目的的大多数报道的催化剂更好。SZMF的催化活性与其提高的B酸/刘易斯酸中心、弱酸中心、碱性中心和高分散的Fe 3+物种的比例有关。同时，SZMF的加入对CO2解吸性能有促进作用，且SZMF具有良好的循环稳定性。提出了SZMF催化CO2解吸过程的可能机理。研究结果为进一步研究和合理设计高效催化剂提供了指导。
The high energy consumption of CO2-loaded solvent regeneration is the biggest impediment for the real application of the amine-based CO2capture process. To lower the energy requirement, three Fe promoted SO42–/ZrO2supported on MCM-41 (SZMF) catalysts with different iron oxide content (5%, 10%, and 15%) were synthesized and applied for the rich monoethanolamine solution regeneration process at 98 °C. Results reveal that the use of SZMF hugely enhanced the CO2desorption performances (i.e., desorption factor) by 260–388% and reduced the heat duty by about 28–40%, which is better than most of the reported catalysts for this purpose. The eminent catalytic activities of SZMF are related to their enhanced ratio of Brønsted to Lewis acid sites, weak acid sites, basic sites, and high dispersed Fe3+species. Meanwhile, the addition of SZMF for CO2desorption shows a promotional effect on its CO2absorption performance, and SZMF presents an excellent cyclic stability. A possible mechanism is suggested for the SZMF catalyzed CO2desorption process. Results of this work may provide direction for future research and rational design of more efficient catalysts for this potential catalyst-aided CO2desorption technology.