SO2与O2对硫改性石油焦吸附剂脱汞性能的影响

doi:10.16085/j.issn.1000-6613.2017-1399

化工进展 ›› 2018, Vol. 37 ›› Issue (05): 1908-1915.DOI: 10.16085/j.issn.1000-6613.2017-1399

SO₂与O₂对硫改性石油焦吸附剂脱汞性能的影响

李娜, 韦红旗, 段钰锋, 王晨平, 佘敏, 胡鹏, 王双群

能源热转换及其过程测控教育部重点实验室(东南大学), 东南大学能源与环境学院, 江苏南京 210096

收稿日期:2017-07-07 修回日期:2017-08-11 出版日期:2018-05-05 发布日期:2018-05-05
通讯作者: 韦红旗,硕士,副教授,硕士生导师;段钰锋,博士,教授,博士生导师。
作者简介:李娜(1994-),女,硕士研究生。E-mail:1216787029@qq.com。
基金资助:
国家重点研发计划（2016YFB0600604）及国家自然科学基金（51676041）项目。

Effects of SO₂ and O₂ on Hg⁰ removal capacity of sulfur modified petrol coke adsorbents

LI Na, WEI Hongqi, DUAN Yufeng, WANG Chenping, SHE Min, HU Peng, WANG Shuangqun

Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education(Southeast University), School of Energy and Environment, Southeast University, Nanjing 210096, Jiangsu, China

Received:2017-07-07 Revised:2017-08-11 Online:2018-05-05 Published:2018-05-05

摘要/Abstract

摘要： 利用SO₂作为气体活化剂改性石油焦制备脱汞吸附剂；通过比表面积及孔隙度分析仪、元素分析仪及X射线光电子能谱分析（XPS）等方法对吸附剂的物理化学性质进行表征；在固定床实验装置上对改性石油焦进行汞吸附实验，并对吸附产物进行程序升温脱附。结果表明，SO₂活化改性后的石油焦表面结构得到有效改善，表面硫形态以有利于汞吸附的低价态硫为主。在模拟烟气气氛中加入O₂能够有效提高脱汞效率，加入SO₂则会对脱汞产生抑制作用，且抑制程度随SO₂浓度的增加而增强。在模拟烟气气氛中同时加入O₂和SO₂，对脱汞产生的作用效果与SO₂的浓度有关。对比不同温度下的汞吸附与脱附结果，证明高温会对石油焦表面含硫、含氧官能团产生抑制作用。

关键词: 硫改性, 石油焦, 二氧化硫, 氧气, 脱汞

Abstract: Petrol coke was modified uisng SO₂ as a gas activating agent. The physical and chemical properties of adsorbents were characterized using surface area and porosity analyzer, elemental analyzer,and X ray photoelectron spectroscopy (XPS). Mercury adsorption experiments were carried out on the fixed bed testing equipment;and the adsorption products were desorbed by temperature-controlled desorption experiment. The results indicated that the microstructure of the surface of the modified petrol coke had been improved effectively;and the surface sulfur content was dominated by the low valence sulfur which was beneficial to mercury adsorption. Adding O₂ to the simulated flue gas could effectively improve the mercury removal efficiency. But the addition of the SO₂ could inhibit mercury removal. the inhibition degree increased with the increase of the SO₂ concentration. When O₂and SO₂ were added together,the effect on removal of mercury was closely related to the concentration of the SO₂. The experiments of mercury adsorption and temperature-programmed desorption at different temperatures showed that the high temperature could inhibit the oxygen-containing functional groups on the surface of the high sulfur petrol coke.

Key words: sulfur modification, petrol coke, sulfur dioxide, oxygen, mercury removal

中图分类号:

X511

李娜, 韦红旗, 段钰锋, 王晨平, 佘敏, 胡鹏, 王双群. SO₂与O₂对硫改性石油焦吸附剂脱汞性能的影响[J]. 化工进展, 2018, 37(05): 1908-1915.

LI Na, WEI Hongqi, DUAN Yufeng, WANG Chenping, SHE Min, HU Peng, WANG Shuangqun. Effects of SO₂ and O₂ on Hg⁰ removal capacity of sulfur modified petrol coke adsorbents[J]. Chemical Industry and Engineering Progress, 2018, 37(05): 1908-1915.

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SO₂与O₂对硫改性石油焦吸附剂脱汞性能的影响

Effects of SO₂ and O₂ on Hg⁰ removal capacity of sulfur modified petrol coke adsorbents

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