微波再生对活性炭循环吸附SO<sub>2</sub>的影响

张立强; 崔琳; 王志强; 董勇

微波再生对活性炭循环吸附SO₂的影响

山东大学燃煤污染物减排国家工程实验室, 山东济南 250061

基金项目: 国家自然科学基金（51206097，51176103）。

详细信息

通讯作者:
董勇，男，博士，教授，E-mail：dongy@sdu.edu.cn。

中图分类号: TK09
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出版历程
- 收稿日期: 2013-12-27
- 修回日期: 2014-03-31
- 刊出日期: 2014-07-30

Effects of microwave regeneration of activated carbon on its SO₂ adsorption

National Engineering Laboratory for Coal-fired Pollutants Emission Reduction, Shandong University, Jinan 250061, China

摘要

摘要: 研究了脱硫活性炭的微波再生及其对烟气中SO₂的循环吸附特性。通过扫描电镜、N₂吸附、元素分析、Boehm滴定等表征了微波再生对活性炭孔隙结构和表面化学性质的影响，分析了微波再生对活性炭循环吸附烟气中SO₂的影响规律。结果表明，微波再生是脱硫活性炭再生的有效手段，在合适的再生功率下，经过多次循环吸附/再生后，活性炭仍然保持较高的吸附容量，吸附17次后再生活性炭仍然高于原始活性炭，但同时由于再生过程中存在C与H₂SO₄的反应，活性炭存在明显的烧失现象。初次再生后，活性炭的表面酸性官能团在高温下基本完全分解，碱性官能团含量上升，活性炭的SO₂吸附容量明显提高；多次吸附/再生循环后，再生反应起到了活化的作用，使活性炭的孔结构变狭长，微孔比表面积和微孔容积呈上升趋势，同时酸性和碱性官能团基本保持稳定，活性炭的SO₂吸附容量逐渐增加。
- 活性炭 /
- 微波再生 /
- 孔隙结构 /
- 表面官能团 /
- SO₂
Abstract: The microwave regeneration of SO₂ loaded activated carbon (AC) and its circulation adsorption characteristics were studied. The effects of microwave regeneration on the pore texture and surface chemistry of AC were analyzed by SEM, low temperature N₂ adsorption, elemental analysis and Boehm titration. The results show that microwave irradiation is an effective regeneration method. In the suitable regenerative power, after many circulation adsorption/regeneration, the AC still remains high adsorption capacity. After 17th circulation, the adsorption capacity of AC is still higher than the primitive AC. Hower, there is obviously weight loss for AC during the regeneration because of the reaction between C and H₂SO₄. After first regeneration, the surface acidic functional groups of the AC almost decompose at high temperature, and the surface basic functional groups increase, so the SO₂ adsorption capacity of AC is enhanced. After several adsorption/regeneration circulations, the surface acidic functional groups and basic functional groups remain stable, while the pore structure of AC becomes long and narrow for the activation of regeneration. And the specific surface area and volume of micropore increase, which benefits the SO₂ adsorption on AC.
- activated carbon /
- microwave regeneration /
- pore texture /
- surface functional groups /
- SO₂

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参考文献(24)

张守玉, 房倚天, 黄戒介, 颜振明, 张建民, 王洋. 活性焦吸附氧化法脱除烟道气中二氧化硫[J]. 燃料化学学报, 1999, 27(6): 465-468. (ZHANG Shou-yu, FANG Yi-tian, HUANG Jie-jie, YAN Zhen-ming, ZHANG Jian-min, WANG Yang. Eliminating sulfur dioxide from flue gas by adsorption and oxidation on active coke[J]. Journal of Fuel Chemistry and Technology, 1999, 27(6): 465-468.)

赵毅, 韩静, 马天忠. 活性炭纤维负载TiO₂同时脱硫脱硝实验研究[J]. 中国电机工程学报, 2009, 29(11): 44-49. (ZHAO Yi, HAN Jing, MA Tian-zhong. Experimental study on simultaneous desulfurization and denitrification by supporting TiO₂ on activated carbon fiber[J]. Proceedings of the CSEE, 2009, 29(11): 44-49.)

林金春, 高恒, 温建华, 林秀兰, 陈孝云. 微波加热在活性炭再生中应用研究进展[J]. 科学技术与工程, 2008, 8(23): 1671-1819. (LIN Jin-chun, GAO Heng, WEN Jian-hua, LIN Xiu-lan, CHEN Xiao-yun. Application of microwave heating in regenerating activated carbon[J]. Science Technology and Engineering, 2008, 8(23): 1671-1819.)

孙康, 蒋建春. 活性炭再生方法及工艺设备的研究进展[J]. 生物质化学工程, 2008, 42(6): 55-60. (SUN Kang, JIANG Jian-chun. Research progress of technologies and equipments for regeneration of activated carbon[J]. Biomass Chemical Engineering, 2008, 42(6): 55-60.)

FOO Y, HAMEED H. Recent developments in the preparation and regeneration of activated carbons by microwaves[J]. Adv Colloid Interface Sci, 2009, 149(1/2): 19-27.

BOUDOU J P, ALONZO A M, TASCON J M. Introduction of acidic groups at the surface of activated carbon by microwave-induced oxygen plasma at low pressure[J]. Carbon, 2000, 38(7): 1021-1029.

MENENDEZ J A, MENENDEZ E M, IGLESIAS M J, GARCIA A, PIS J J. Modification of the surface chemistry of active carbons by means of microwave-induced treatments[J]. Carbon, 1999, 37(7): 1115-1121.

LIU Q S, ZHENG T, LI N, WANG P, ABULIKEMU G. Modification of bamboo-based activated carbon using microwave radiation and its effects on the adsorption of methylene blue[J]. Appl Surf Sci, 2010, 256(10): 3309-3315.

马双忱, 马宵颖, 郭天祥, 赵毅. 微波改性活性炭用于烟气脱硫脱硝的实验研究[J]. 燃料化学学报, 2010, 38(6): 739-744. (MA Shuang-chen, MA Xiao-ying, GUO Tian-xiang, ZHAO Yi. Experimental study on desulfurization and denitrification from flue gas over modified activated carbon using microwave irradiation[J]. Journal of Fuel Chemistry and Technology, 2010, 38(6): 739-744.)

江霞, 蒋文举, 朱晓帆. 微波改性活性炭脱硫性能的初步研究[J]. 环境工程, 2003, 21(3): 36-40. (JIANG Xia, JIANG Wen-ju, ZHU Xiao-fan. Preliminary study on SO₂ adsorption capacity of activated carbon modified by microwave[J]. Environmental Engineering, 2003, 21(3): 36-40.)

马双忱, 赵毅, 马宵颖, 郭天祥, 刘皓磊, 姚为方. 微波诱导催化还原脱硫脱硝实验研究[J]. 中国电机工程学报, 2006, 26(18): 121-126. (MA Shuang-chen, ZHAO Yi, MA Xiao-ying, GUO Tian-xiang, LIU Hao-lei, YAO Wei-fang. Experimental study on microwave induced catalyzed reduction for desulfurization and denitrification[J]. Proceedings of the CSEE, 2006, 26(18): 121-126.)

张守玉, 朱延钰, 杨之媛, 吕红, 黄戒介, 王洋. 煤质活性焦用于脱除烟道气中的SO₂[J]. 燃烧科学与技术, 2002, 8(1): 38-43. (ZHANG Shou-yu, ZHU Ting-yu, YANG Zhi-yuan, LV Hong, HUANG Jie-jie, WANG Yang. Application of active coke derived from coal for SO₂-removal from flue gas[J]. Journal of Combustion Science and Technology, 2002, 8(1): 38-43.)

李开喜, 凌立成, 刘朗, 张碧江, 刘振宇. 热处理改性的活性炭纤维的脱硫活性[J]. 催化学报, 2000, 20(3): 264-268. (LI Kai-xi, LING Li-cheng, LIU Lang, ZHANG Bi-jiang, LIU Zhen-yu. Desulfurization activity of activated carbon fiber modified by heat treatment[J].Chinese Journal of Catalysis, 2000, 20(3): 264-268.)

BRADSHAW S M, VAN WYK E J, DE SWARDT J B. Preliminary economic assessment of microwave regeneration of activated carbon for the carbon in pulp process[J]. J Microwave Power E, 1997, 32(3): 131-144.

QUAN M, LIU X T, BO L L. CHEN S,ZHAO Y Z. CUI X Y. Regeneration of acid orange 7-exhausted granular activated carbons with microwave irradiation[J]. Water Res, 2004, 38(20): 4484-4490.

杨斌武, 蒋文举, 朱晓帆, 刘小燕, 何媛媛. 微波辐照法再生载硫活性炭的研究[J]. 化工环保, 2003, 23(3): 125-128. (YANG Bin-bin, JIANG Wen-ju, ZHU Xiao-fan, LIU Xiao-yan, HE Yuan-yuan. Study on regeneration of SO2-loaded activated carbon by microwave irradiation[J]. Environmental Protection of Chemical Industry, 2003, 23(3): 125-128.)

牛志睿, 黄学敏. 吸附SO₂饱和活性碳纤维的微波解析性能研究[J]. 延安大学学报(自然科学版), 2008, 27(2): 1098-1103. (NIU Zhi-rui, HUANG Xue-min. On the regeneration of activated carbon fiber with SO₂ by microwave radiation[J]. Journal of Yanan University, 2008, 27(2): 1098-1103.)

李兵, 蒋海涛, 张立强, 王志强, 马春元. 微波加热改性活性炭及其对SO₂吸附性能的影响[J]. 中国电机工程学报, 2012, 32(29):45-51. (LI Bing, JIANG Hai-tao, ZHANG Li-qiang, WANG Zhi-qiang, MA Chun-yuan. Modification of activated carbon by microwave heating and its effects on SO₂ adsorption[J]. Proceedings of the CSEE, 2012, 32(29): 45-51.)

张立强, 蒋海涛, 马春元, 董勇. 烟气脱硫活性炭微波再生特性的实验研究[J]. 燃料化学学报, 2012, 40(11): 1366-1371. (ZHANG Li-qiang, JIANG Hai-tao, MA Chun-yuan, DONG Yong. Microwave regeneration characteristics of activated carbon for flue gas desulphurization[J]. Journal of Fuel Chemistry and Technology, 2012, 40(11): 1366-1371.)

潘志铭. 微波加热中的温度检测[J]. 深圳大学学报: 理工版, 2002, 19(2): 81-84. (PAN Zhi-ming. Temperature measurement in the application of microwave heating[J]. Journal of Shenzhen University: Science & Engineering, 2002, 19(2): 81-84.)

DAVINI P. Adsorption and desorption of SO₂ on active carbon. The effect of surface basic groups[J]. Carbon, 1990, 28(4): 565-571.

RAYMUNDO-PONERO E, AZORDA-AMOROS D, DE LECEA C, LINARES-SOLANO A. Factors controlling the SO₂ removel by porous carbons: Relevance of SO₂ oxidation step[J]. Carbon, 2000, 38(3): 335-344.

张永奇, 房倚天, 黄戒介, 王洋. 活性焦孔结构及表面性质对脱除烟气中SO₂的影响[J]. 燃烧科学与技术, 2004, 10(2): 160-164. (ZHANG Yong-qi, FANG Yi-tian, HUANG Jie-jie, WANG Yang. Effects of micropore structure and surface properties on the SO₂ removal in flue gas by active coke[J]. Journal of Combustion Science and Technology, 2004, 10(2): 160-164.)

单晓梅, 张文辉, 杜铭华, 朱书全. 湿氧化和热处理对煤基活性炭吸附SO₂的影响[J]. 煤炭学报, 2004, 28(2): 208-212. (SHAN Xiao-mei, ZHANG Wen-hui, DU Ming-hua, ZHU Shu-quan. Effect of wet oxidation and heat-treatment on the SO₂ adsorption capacity for coal-based activated carbon[J]. Journal of China Coal Society, 2004, 28(2): 208-212.)

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