CIESC Journal ›› 2023, Vol. 74 ›› Issue (6): 2668-2679.DOI: 10.11949/0438-1157.20230296

• Energy and environmental engineering • Previous Articles     Next Articles

Performance study of KOH modified carbide slag for removal of carbonyl sulfide

Feng ZHU1(), Kailin CHEN1, Xiaofeng HUANG1,2(), Yinzhu BAO1, Wenbin LI1, Jiaxin LIU1, Weiqiang WU1, Wangwei GAO1   

  1. 1.Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, Yunnan, China
    2.National-Regional Engineering Center for Recovery of Waste Gases from Metallurgical and Chemical Industries, Kunming 650500, Yunnan, China
  • Received:2023-03-27 Revised:2023-06-05 Online:2023-07-27 Published:2023-06-05
  • Contact: Xiaofeng HUANG

KOH改性电石渣脱除羰基硫的性能研究

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   

  1. 1.昆明理工大学环境科学与工程学院,云南 昆明 650500
    2.冶金及化工行业废气资源化国家地方联合工程研究中心,云南 昆明 650500
  • 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:
    国家自然科学基金项目(51768074);云南省大学生创新创业训练计划项目(20211067400158)

Abstract:

In this paper, KOH modified carbide slag was prepared by excessive impregnation using carbide slag as raw material, and the effects of different KOH content (10%—30%), calcination temperature (700—900℃), calcination time (5—7 h), carbonyl sulfide (COS) inlet concentration (200—1000 mg/m3), space velocity (5733—11404 h-1), and reaction temperature (25—75℃) on the removal of COS were investigated. The desulfurization performance and reaction process of KOH modified carbide slag were preliminarily studied by N2-BET, SEM-EDS, XPS, XRD and FTIR, and it was found that catalytic hydrolysis, oxidation reaction and acid-base adsorption mainly occurred in the process of COS removal with KOH modified carbide slag. The results showed that the optimal preparation conditions were the calcination temperature of 800℃, the calcination time of 6 h, and the KOH content of 25%. Under this condition, the best effect of COS removal from KOH modified carbide slag was achieved when the inlet concentration, reaction temperature and space velocity was 600 mg/m3, 25℃ and 5733 h-1, respectively, and COS breakthrough adsorption amount was 43.70 mg/g at this time.

Key words: carbide slag, carbonyl sulfide, preparation, multiphase reaction, fixed-bed, performance

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。

关键词: 电石渣, 羰基硫, 制备, 多相反应, 固定床, 性能

CLC Number: