化工学报 ›› 2023, Vol. 74 ›› Issue (6): 2668-2679.DOI: 10.11949/0438-1157.20230296
朱风1(), 陈凯琳1, 黄小凤1,2(), 鲍银珠1, 李文斌1, 刘嘉鑫1, 吴玮强1, 高王伟1
收稿日期:
2023-03-27
修回日期:
2023-06-05
出版日期:
2023-06-05
发布日期:
2023-07-27
通讯作者:
黄小凤
作者简介:
朱风(1999—),女,硕士研究生,1311019104@qq.com
基金资助:
Feng ZHU1(), Kailin CHEN1, Xiaofeng HUANG1,2(), Yinzhu BAO1, Wenbin LI1, Jiaxin LIU1, Weiqiang WU1, Wangwei GAO1
Received:
2023-03-27
Revised:
2023-06-05
Online:
2023-06-05
Published:
2023-07-27
Contact:
Xiaofeng HUANG
摘要:
以电石渣为原料,采用过体积浸渍法制备KOH改性电石渣,考察了不同制备条件及工艺条件对脱除羰基硫(COS)的影响,并通过N2-BET、SEM-EDS、XPS、FTIR等方法进行表征,初步探究了改性电石渣的脱硫性能及反应过程,发现KOH改性电石渣脱除COS的过程中主要发生催化水解、氧化反应及酸碱吸附。结果表明,最佳制备条件为焙烧温度800℃、焙烧时间6 h,KOH最适添加量为25%;在此条件下,当入口浓度、反应温度和空速分别为600 mg/m3、25℃和5733 h-1时,KOH改性电石渣脱除COS效果最佳,穿透吸附量为43.70 mg/g。
中图分类号:
朱风, 陈凯琳, 黄小凤, 鲍银珠, 李文斌, 刘嘉鑫, 吴玮强, 高王伟. KOH改性电石渣脱除羰基硫的性能研究[J]. 化工学报, 2023, 74(6): 2668-2679.
Feng ZHU, Kailin CHEN, Xiaofeng HUANG, Yinzhu BAO, Wenbin LI, Jiaxin LIU, Weiqiang WU, Wangwei GAO. Performance study of KOH modified carbide slag for removal of carbonyl sulfide[J]. CIESC Journal, 2023, 74(6): 2668-2679.
化学组成/%(质量) | |||||||
---|---|---|---|---|---|---|---|
CaO | SiO2 | Al2O3 | Fe2O3 | MgO | Na2O | Cl | SO3 |
93.278 | 3.006 | 1.864 | 0.245 | 0.093 | 0.38 | 0.093 | 0.502 |
表1 电石渣化学组成
Table 1 Chemical composition of carbide slag
化学组成/%(质量) | |||||||
---|---|---|---|---|---|---|---|
CaO | SiO2 | Al2O3 | Fe2O3 | MgO | Na2O | Cl | SO3 |
93.278 | 3.006 | 1.864 | 0.245 | 0.093 | 0.38 | 0.093 | 0.502 |
样品 | 比表面积/(m2/g) | 总孔体积/(cm3/g) | 平均孔径/nm |
---|---|---|---|
800-6-CS | 1.8618 | 0.007424 | 7.8737 |
800-6-25%KOH-CS | 7.5073 | 0.042714 | 25.6445 |
800-6-25%KOH-CS-COS | 5.5664 | 0.043636 | 19.3113 |
表2 800-6-CS、800-6-25%KOH-CS、800-6-25%KOH-CS-COS的孔结构特征
Table 2 Pore structure characteristics of 800-6-CS, 800-6-25%KOH-CS, and 800-6-25%KOH-CS-COS
样品 | 比表面积/(m2/g) | 总孔体积/(cm3/g) | 平均孔径/nm |
---|---|---|---|
800-6-CS | 1.8618 | 0.007424 | 7.8737 |
800-6-25%KOH-CS | 7.5073 | 0.042714 | 25.6445 |
800-6-25%KOH-CS-COS | 5.5664 | 0.043636 | 19.3113 |
图10 800-6-CS、800-6-25%KOH-CS、800-6-25%KOH-CS-COS的吸附-脱附等温线
Fig.10 Nitrogen adsorption-desorption isotherms of 800-6-CS, 800-6-25%KOH-CS, and 800-6-25%KOH-CS-COS
样品 | 质量分数/% | 原子分数/% | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
C | O | Ca | Al | Si | K | S | C | O | Ca | Al | Si | K | S | |
800-6-CS | 2.73 | 33.23 | 60.17 | 0.99 | 2.11 | 0.03 | 0.07 | 5.77 | 52.66 | 38.21 | 0.93 | 1.90 | 0.04 | 0.06 |
800-6-25%KOH-CS | 7.50 | 39.00 | 43.70 | 1.00 | 1.40 | 7.06 | 0 | 14.00 | 55.10 | 24.70 | 0.80 | 1.10 | 4.10 | 0.03 |
800-6-25%KOH-CS-COS | 9.30 | 40.60 | 41.60 | 0.80 | 1.00 | 5.10 | 1.60 | 16.80 | 55.30 | 22.60 | 0.70 | 0.70 | 2.80 | 1.20 |
表3 800-6-CS、800-6-25%KOH-CS、800-6-25%KOH-CS-COS的EDS元素分析
Table 3 EDS elemental analysis of 800-6-CS, 800-6-25%KOH-CS, and 800-6-25%KOH-CS-COS
样品 | 质量分数/% | 原子分数/% | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
C | O | Ca | Al | Si | K | S | C | O | Ca | Al | Si | K | S | |
800-6-CS | 2.73 | 33.23 | 60.17 | 0.99 | 2.11 | 0.03 | 0.07 | 5.77 | 52.66 | 38.21 | 0.93 | 1.90 | 0.04 | 0.06 |
800-6-25%KOH-CS | 7.50 | 39.00 | 43.70 | 1.00 | 1.40 | 7.06 | 0 | 14.00 | 55.10 | 24.70 | 0.80 | 1.10 | 4.10 | 0.03 |
800-6-25%KOH-CS-COS | 9.30 | 40.60 | 41.60 | 0.80 | 1.00 | 5.10 | 1.60 | 16.80 | 55.30 | 22.60 | 0.70 | 0.70 | 2.80 | 1.20 |
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