循环流化床煤热解半焦制备脱硫用活性焦

doi:10.12034/j.issn.1009-606X.216305

过程工程学报 ›› 2017, Vol. 17 ›› Issue (2): 333-338.DOI: 10.12034/j.issn.1009-606X.216305

循环流化床煤热解半焦制备脱硫用活性焦

朱严，曾伟强，王勤辉，方梦祥，骆仲泱，施正伦^*

浙江大学能源清洁利用国家重点实验室，浙江杭州 310027

收稿日期:2016-09-22 修回日期:2016-10-25 出版日期:2017-04-20 发布日期:2017-04-19
通讯作者: 施正伦 szl@cmee.zju.edu.cn
基金资助:
能源清洁利用国家重点实验室目标导向重点项目

Activated Coke Prepared by Circulating Fluidized Bed Coal Pyrolysis Semi-coke for Desulphurization

^{ZHU Yan, ZENG Wei-qiang, WANG Qin-hui, FANG Meng-xiang, LUO Zhong-yang, SHI Zheng-lun^*}

State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou, Zhejiang 310027, China

Received:2016-09-22 Revised:2016-10-25 Online:2017-04-20 Published:2017-04-19
Contact: SHI Zheng-lun szl@cmee.zju.edu.cn

摘要/Abstract

摘要： 以循环流化床煤热解半焦和煤焦油为原料，通过CO2活化法制备成型活性焦，通过等体积浸渍法负载不同比例的V2O5、Cr2O3、Fe2(SO4)3。依据相应国标对样品耐磨耐压强度进行了测定，采用N2吸附法对样品孔结构进行表征，采用固定床实验系统对样品脱硫性能进行测试。研究表明，适宜的成型工艺为：煤焦油比例30%，炭化温度600 ℃，炭化时间60 min；适宜的活化工艺为：CO2流量15 ml?min-1?g-1，活化温度950 ℃，活化时间80 min。样品脱硫值与比表面积、微孔孔容和总孔容之间有着较为明显的正相关关系。负载V2O5的样品脱硫性能有明显的提升，V2O5最佳负载量为1%，负载了Cr2O3、Fe2(SO4)3的样品脱硫性能未得到提升。样品用于烟气脱硫时的适宜空速为1500 h-1，此空速下，90%以上脱硫效率可维持超过4 h。

关键词: 半焦, 活性焦, CO2活化, 烟气脱硫, 孔隙结构

Abstract: Shaped activated coke (AC) were prepared from circulating fluidized bed coal pyrolysis semi-coke and coal tar by CO2 activation. Different proportions of V2O5, Cr2O3 and Fe2(SO4)3 were loaded on ACs by pore volume impregnation. Abrasion and compressive strength of ACs were measured according to corresponding GB. Pore structure of the ACs was characterized by N2 adsorption, and desulfurization performances of different ACs were tested on fixed bed system. Results show that the proper shaping condition are: coal tar of 30%, carbonization temperature of 600 ℃ and carbonization time of 60 min. The proper activation condition are: CO2 flow rate of 15 ml?min-1?g-1, activation temperature of 950 ℃ and activation time of 80min. Desulfurization performances of ACs show a significant positive correlation with specific surface area, microporous pore volume and total pore volume. Loading V2O5 highly improved the desulfurization performance of ACs and the optimum proportion of V2O5 is 1%. Loading Cr2O3 or Fe2(SO4)3 cannot improve desulfurization performance. The proper space velocity is 1500 h-1 while using AC for flue gas desulfurization and desulfurization efficiency above 90% can maintain more than 4 h in this space velocity.

Key words: semi-coke, activated coke, CO2 activation, flue gas desulfurization, pore structure

朱严曾伟强王勤辉方梦祥骆仲泱施正伦. 循环流化床煤热解半焦制备脱硫用活性焦[J]. 过程工程学报, 2017, 17(2): 333-338.

ZHU Yan ZENG Wei-qiang WANG Qin-hui FANG Meng-xiang LUO Zhong-yang SHI Zheng-lun. Activated Coke Prepared by Circulating Fluidized Bed Coal Pyrolysis Semi-coke for Desulphurization[J]. Chin. J. Process Eng., 2017, 17(2): 333-338.

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循环流化床煤热解半焦制备脱硫用活性焦

Activated Coke Prepared by Circulating Fluidized Bed Coal Pyrolysis Semi-coke for Desulphurization

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