Capturing ability for COS gas by a strong bridge bonding of a pair of potassium anchored on carbonate of activated carbon at low temperatures

被引：23

作者：

Kim, Junyeong ^{[1
]}

Do, Jeong Yeon ^{[1
]}

Nahm, Keepyung ^{[1
]}

Park, No-Kuk ^{[2
]}

Chi, Junhwa ^{[3
]}

Hong, Jin-Pyo ^{[3
]}

Kang, Misook ^{[1
]}

机构：

[1] Yeungnam Univ, Coll Nat Sci, Dept Chem, Gyongsan 38541, Gyeongbuk, South Korea

[2] Yeungnam Univ, Sch Chem Engn, Gyongsan 38541, Gyeongbuk, South Korea

[3] Korea Elect Power Corp Res Inst, 105 Munji Ro, Daejeon 34056, South Korea

来源：

SEPARATION AND PURIFICATION TECHNOLOGY | 2019年 / 211卷

关键词：

AC-K; Potassium carbonate; COS adsorption; COS desorption mechanism; SIMULTANEOUS REMOVAL; SULFIDE; HYDROLYSIS; ADSORPTION; DISULFIDE; MECHANISM; H2S;

D O I：

10.1016/j.seppur.2018.10.013

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

To maximize the adsorption of COS (carbonyl sulfide) gas, activated carbon (AC) with a large surface area was modified with K as a low-cost adsorbent capable of bonding at low temperatures with the S in COS. The contents of AC and K were fixed at 80% and 20%, respectively. The COS gas was dynamically adsorbed by AC-K at an optimum temperature of 210 degrees C with a sulfur-adsorption capacity of 56.1 mg/g. The structure of the K adsorbent was confirmed as K2CO3 via X-ray diffraction and the K components were highly dispersed on the surface of the AC, as indicated by SEM and EDAX analyses. Furthermore, the correlation between the specific surface area of AC-K and COS adsorption was examined using FT-IR, XPS, and MASS analyses. The mechanisms by which the COS adsorbed/desorbed from the adsorbent were determined and an overall mechanism describing COS adsorption behavior was proposed.

引用

页码：421 / 429

页数：9

共 28 条

[1] Three way electron transfer of a C-N-S tri doped two-phase junction of TiO2 nanoparticles for efficient visible light photocatalytic dye degradation [J].