HY分子筛的SO2吸附性能研究

石油炼制与化工 ›› 2020, Vol. 51 ›› Issue (10): 46-52.

HY分子筛的SO2吸附性能研究

武传朋,陈妍,郭大为,宋海涛,毛安国,达志坚

中国石化石油化工科学研究院

收稿日期:2020-02-26 修回日期:2020-05-11 出版日期:2020-10-12 发布日期:2020-10-27
通讯作者: 达志坚 E-mail:dazhijian.ripp@sinopec.com
基金资助:
FCC烟气及二次污染物综合治理技术开发与应用

STUDY ON SO2 ADSORPTION PERFORMANCE OF HY MOLECULAR SIEVES

Received:2020-02-26 Revised:2020-05-11 Online:2020-10-12 Published:2020-10-27
Contact: Jian ZhiDa E-mail:dazhijian.ripp@sinopec.com

摘要/Abstract

摘要： 以3种不同硅铝比的HY分子筛HY-1，HY-2，HY-3为吸附剂，在小型固定床评价装置上进行SO2动态吸附试验，考察HY分子筛的SO2吸附性能，得到饱和吸附容量与分子筛硅铝比的关系。釆用BET比表面积测试、X射线衍射、X射线荧光光谱和CO2/O2程序升温脱附等分析手段对HY-1，HY-2，HY-3进行物理化学性质表征，并将表征结果与SO2动态吸附试验结果相关联。结果表明：随着硅铝比增大，HY分子筛HY-1，HY-2，HY-3的SO2穿透时间依次减短，饱和吸附容量依次减小，增大硅铝比不利于HY分子筛吸附SO2；HY分子筛的SO2饱和吸附容量与其表面碱性位含量成正比；分子筛对SO2的吸附性能与其表面氧物种和含量直接相关，随硅铝比增大，HY分子筛表面化学吸附氧含量依次降低，其化学吸附SO2的量也依次降低。

关键词: HY型分子筛, 吸附, SO2, 硅铝比, 吸附容量

Abstract: Three HY molecular sieves HY-1，HY-2，HY-3 with different ratios of Si/Al were used as adsorbents to perform experiments of SO2 adsorption in a fixed bed device. The relationship between saturation adsorption capacity and Si-Al ratios of the sieves was investigated. Physicochemical properties of HY molecular sieves were characterized by BET，XRD，XRF，CO2/O2-TPD techniques and correlated with SO2 saturated adsorption capacity. It was shown by the results that with the increase of Si/Al ratio, the SO2 penetration time of molecular sieves HY-1, HY-2 and HY-3 decreased in turn, and the saturated adsorption capacity decreased in turn, indicating that increasing Si/Al ratio is not conducive to adsorption of SO2 by HY molecular sieves and that the SO2 saturation adsorption capacity of HY molecular sieve was directly proportional to the basic content on its surface. It was found that the adsorption performance of molecular sieve for SO2 is directly related to the species and content of oxygen on its surface. With the increase of Si/Al ratio, the content of chemically adsorbed oxygen on HY molecular sieve surface decreased in turn for the three sieves, and the amount of chemically adsorbed SO2 decreased in turn.

Key words: HY molecular sieve, adsorption, SO2, Si/Al ratio, adsorption capacity

武传朋陈妍郭大为宋海涛毛安国达志坚. HY分子筛的SO2吸附性能研究[J]. 石油炼制与化工, 2020, 51(10): 46-52.

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