提高Na2CO3-γ-Al2O3吸附SO2和NO性能助剂的研究

石油炼制与化工 ›› 2013, Vol. 44 ›› Issue (2): 27-32.

提高Na2CO3-γ-Al2O3吸附SO2和NO性能助剂的研究

杜冰¹,宗保宁²,罗一斌²,王维家²

1. 北京低碳清洁能源研究所
2. 中国石化石油化工科学研究院

收稿日期:2012-06-18 修回日期:2012-07-18 出版日期:2013-02-12 发布日期:2013-01-30
通讯作者: 杜冰 E-mail:dubing@nicenergy.com

STUDY ON THE PROMOTERS FOR Na2CO3-γ-Al2O3 SORBENT TO ENHANCE THE ADSORPTION OF SO2 AND NO

Received:2012-06-18 Revised:2012-07-18 Online:2013-02-12 Published:2013-01-30

摘要/Abstract

摘要： 在常压固定床条件下，通过在吸附脱除烟气中SO2和NO的吸附剂Na2CO3-γ-Al2O3表面添加不同的过渡金属氧化物助剂，考察各助剂对吸附剂吸附性能的影响以及吸附条件对添加助剂MnO2后吸附剂Mn-Na2CO3-γ-Al2O3吸附性能的影响。结果表明：助剂MnO2的性能较好，这是因为添加MnO2提高了吸附剂Na2CO3-γ-Al2O3表面晶格氧的浓度，促进了SO2和NO的氧化反应，增加了吸附剂Na2CO3-γ-Al2O3表面SO2和NO的吸附容量；确定的最佳吸附条件为：n(SO2):n(NO)=2，吸附温度为常温至50 ℃，O2体积分数大于2.0％。

Abstract: Various transition metal oxide promoters were added respectively into Na2CO3-γ-Al2O3 sorbent for removing SO2 and NO from flue gas. The effect of promoters on the adsorption performance of sorbent was studied by a fixed-bed reactor, and the influence of adsorption conditions on the performance of modified sorbent was investigated. Results showed that MnO2-modified Na2CO3-γ-Al2O3 exhibited the best adsorption performance due to enhancing the surface lattice oxygen concentration of the sorbent, which could promote the oxidation of SO2 and NO and increase the adsorption capacity of sorbent. The optimum adsorption conditions for Mn-Na2CO3-γ-Al2O3 were as follows: SO2/NO molar ratio of 2, the adsorption temperature in the range of room temperature to 50 ℃ and oxygen volume fraction of over 2.0%.

杜冰宗保宁罗一斌王维家. 提高Na2CO3-γ-Al2O3吸附SO2和NO性能助剂的研究[J]. 石油炼制与化工, 2013, 44(2): 27-32.