Effects of properties of minerals adsorbents for the adsorption and desorption of volatile organic compounds (VOC)

被引：66

作者：

Zhang, Guangxin ^{[1
,2
]}

Feizbakhshan, Mohammad ^{[2
]}

Zheng, Shuilin ^{[1
]}

Hashisho, Zaher ^{[2
]}

Sun, Zhiming ^{[1
]}

Liu, Yangyu ^{[1
]}

机构：

[1] China Univ Min & Technol Beijing, Sch Chem & Environm Engn, Beijing 100083, Peoples R China

[2] Univ Alberta, Dept Civil & Environm Engn, Edmonton, AB T6G 2W2, Canada

来源：

APPLIED CLAY SCIENCE | 2019年 / 173卷

基金：

国家重点研发计划;

关键词：

Adsorption; Desorption; Mineral; Volatile organic compounds; BENZENE ADSORPTION; PHASE ADSORPTION; AIR; PERFORMANCE; DIATOMITE; ZEOLITES; REMOVAL; VAPORS;

D O I：

10.1016/j.clay.2019.02.022

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In this study, adsorption and desorption performance of three mineral adsorbents (diatomite, clinoptilolite, and palygorskite) was investigated for abatement of six VOC with distinct physical and chemical properties and functional groups. Among the three mineral adsorbents, palygorskite exhibited the highest adsorption capacity for all the tested VOC as indicated by the adsorption breakthrough curves. Characterization of the adsorbents showed that palygorskite had the highest specific surface area and pore volume. The distinct adsorption capacities of minerals for VOC can be attributed to the difference of VOC's boiling point and polarity. Increasing the adsorption temperature and relative humidity decreased adsorption capacity of the minerals for VOC. Non-polar VOC showed more sensitivity to changes in temperature and relative humidity compared to polar VOC. Desorption performance of the mineral adsorbents was studied in 5-cycle adsorption/desorption experiments. The results indicated that the desorption purge gas has no significant impact on desorption efficiency. However, increasing desorption temperature clearly decreased the cumulative heel on the adsorbent. Moreover, non-polar VOC desorbed better from the mineral surface than polar VOC.

引用

页码：88 / 96

页数：9

共 33 条

[21] Control of released volatile organic compounds from industrial facilities using natural and acid-treated mordenites: The role of acidic surface sites on the adsorption mechanism [J].