水蒸气和H2S对白云石循环碳酸化/煅烧过程中CO2捕获性能的影响

doi:10.12034/j.issn.1009-606X.216355

过程工程学报 ›› 2017, Vol. 17 ›› Issue (3): 594-599.DOI: 10.12034/j.issn.1009-606X.216355

水蒸气和H₂S对白云石循环碳酸化/煅烧过程中CO₂捕获性能的影响

杨新芳^1,2^*，赵丽凤^1,2，刘洋^1,2，肖云汉^1,2

1. 中国科学院工程热物理研究所先进能源动力重点实验室，北京 100190；2. 中国科学院能源动力研究中心，江苏连云港 222069

收稿日期:2016-11-30 修回日期:2016-12-29 出版日期:2017-06-20 发布日期:2017-06-14
通讯作者: 杨新芳 yangxinfang@mail.etp.ac.cn
基金资助:
国家自然科学基金项目

Effects of H₂O and H₂S on Cyclic CO₂ Capture Activity of Dolomite during Calcination/Carbonation Process

Xinfang YANG^1,2^*, Lifeng ZHAO^1,2, Yang LIU^1,2, Yunhan XIAO^1,2

1. Key Lab of Advanced Energy & Power, Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China; 2. Research Center for Clean Energy and Power, Chinese Academy of Sciences, Lianyungang, Jiangsu 222069, China

Received:2016-11-30 Revised:2016-12-29 Online:2017-06-20 Published:2017-06-14
Contact: Xin-Fang Yang yangxinfang@mail.etp.ac.cn

摘要/Abstract

摘要：

基于水汽变换条件，利用加压热重分析仪研究了温度、压力及煤气中H₂O和H₂S对白云石煅烧/碳酸化循环捕获CO₂性能的影响. 研究表明，吸收剂在650和700℃时的吸收反应速率和循环稳定性明显优于550和600℃时；加压促进吸收剂对CO₂的吸收，且有H₂O时促进作用更明显；H₂O能有效改善吸收剂的循环稳定性，提高吸收剂在快速动力学反应控制阶段的吸收能力. 650℃时CaO硫化反应速率远小于碳酸化反应速率，煤气中H₂S对CaO吸收CO₂的反应动力学特性无明显影响，但硫化产物CaS在吸收剂表面累积会减少用于吸收CO₂的CaO量，而反应过程中H₂O的存在又会减缓CaS的累积.

关键词: 水汽变换, 白云石, 脱碳, 水蒸气, 硫化氢

Abstract:

The effects of reaction temperature, pressure, H₂O and H₂S on the cyclic CO₂capture activity of dolomite during calcination/ carbonation process were studied with a thermogravimetric analyzer, based on the water gas shift reaction condition. The results indicated that the absorption rate and the cyclic stability at 650 and 700℃ are obviously better than those at 550 and 600℃. The increase of pressure promotes the CO₂ absorption of sorbent, and the enhancement becomes more obvious with H₂O present. H₂O can effectively improve the cyclic stability of the sorbent and enhance the capture capacity at the fast kinetic reaction control stage. At 650℃, the sulfidation rate is far lower than the carbonation rate of CaO. H₂S in the syngas shows no obvious effect on the kinetics of the carbonation reaction. However, the accumulation of sulfidation product CaS over CaO sorbents will reduce the CaO amount for CO₂ absorption, and the H₂O will restrain the accumulation of CaS during the reaction process.

Key words: water - gas shift, dolomite, CO2 capture, H2O, H2S

杨新芳赵丽凤刘洋肖云汉. 水蒸气和H₂S对白云石循环碳酸化/煅烧过程中CO₂捕获性能的影响[J]. 过程工程学报, 2017, 17(3): 594-599.

Xinfang YANG Lifeng ZHAO Yang LIU Yunhan XIAO. Effects of H₂O and H₂S on Cyclic CO₂ Capture Activity of Dolomite during Calcination/Carbonation Process[J]. Chin. J. Process Eng., 2017, 17(3): 594-599.

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水蒸气和H₂S对白云石循环碳酸化/煅烧过程中CO₂捕获性能的影响

Effects of H₂O and H₂S on Cyclic CO₂ Capture Activity of Dolomite during Calcination/Carbonation Process

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