两段流化床中半焦催化脱除焦油特性

doi:10.11949/j.issn.0438-1157.20170651

化工学报 ›› 2017, Vol. 68 ›› Issue (10): 3762-3769.DOI: 10.11949/j.issn.0438-1157.20170651

• 催化、动力学与反应器 • 上一篇下一篇

两段流化床中半焦催化脱除焦油特性

王芳^1,3, 曾玺^1,2, 孙延林¹, 张建岭¹, 唐诗白¹, 余剑¹, 王永刚³, 许光文¹

1 中国科学院过程工程研究所多相复杂系统国家重点实验室, 北京 100190;
2 中国科学院大学中丹学院, 北京 100194;
3 中国矿业大学(北京)化学与环境工程学院, 北京 100083

收稿日期:2017-05-19 修回日期:2017-06-23 出版日期:2017-10-05 发布日期:2017-10-05
通讯作者: 曾玺,xzeng@ipe.ac.cn
基金资助:
国家自然科学基金项目（U1302273）；国家科技支撑计划项目（2014BAC26B04）。

Characteristics of char catalytic reforming of tar in two-stage fluidized bed

WANG Fang^1,3, ZENG Xi^1,2, SUN Yanlin¹, ZHANG Jianling¹, TANG Shibai¹, YU Jian¹, WANG Yonggang³, XU Guangwen¹

1 State Key Laboratory of Multi-phase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China;
2 Sino-Danish College, University of Chinese Academy of Sciences, Beijing 100194, China;
3 School of Chemical and Environmental Engineering, China University of Mining & Technology-Beijing, Beijing 100083, China

Received:2017-05-19 Revised:2017-06-23 Online:2017-10-05 Published:2017-10-05
Supported by:
supported by the National Natural Science Foundation of China (U1302273) and the National Key Technology R&D Program (2014BAC26B04).

摘要/Abstract

摘要：

针对新提出的流化床两段气化制清洁燃气工艺，利用小型流化床两段反应装置进行焦油脱除实验，比较了热裂解和半焦催化重整对焦油脱除的影响。研究发现，半焦对焦油的催化脱除与反应温度、气体在反应器中的停留时间及半焦的比表面积和孔结构密切相关，在实验操作范围内，随反应温度和停留时间的增加，焦油的脱除效率增加，生成更多的有效气体组分。使用半焦的比表面积越大、孔结构越发达，对煤焦油的催化脱除效果越好。与热裂解效果对比，半焦催化重整不仅能有效脱除焦油，提高有效气体组分的含量，且能明显抑制焦油脱除过程中的积炭生成。基于上述分析，适合流化床两段气化工艺的半焦催化脱除焦油条件为操作温度1000℃、气体在半焦床层中停留时间应该在0.9 s以上。

关键词: 催化, 气化, 两段, 流化床, 热裂解, 半焦脱除焦油

Abstract:

The fluidized bed (FB) two-stage gasification process has recently been proposed to produce clean fuel.Catalytic tar removal in a mini FB two-stage apparatus was studied by char catalytic reforming technique.It was found that tar removal was strongly related to reaction temperature,gas residence time in tar reformer,and char specific surface area and porous structure.In the range of experimental conditions,increasing reaction temperature and residence time effectively promoted catalytic reforming of tar and generated more useful gas components.Larger specific surface area and more advanced porous structures of char catalysts delivered better effects on catalytic tar removal.Compared to thermal cracking,char catalytic reforming of tar was more effective in tar removal,production of more useful gas components,and better inhabitation of carbon deposition.The study showed that the suitable operational condition for tar removal by char catalyst in FB two-stage gasification process was temperature of 1000℃ and gas residence time above 0.9 s.

Key words: catalysis, gasification, two-stage, fluidized bed, thermal cracking, tar removal by char

中图分类号:

TQ546.2

王芳, 曾玺, 孙延林, 张建岭, 唐诗白, 余剑, 王永刚, 许光文. 两段流化床中半焦催化脱除焦油特性[J]. 化工学报, 2017, 68(10): 3762-3769.

WANG Fang, ZENG Xi, SUN Yanlin, ZHANG Jianling, TANG Shibai, YU Jian, WANG Yonggang, XU Guangwen. Characteristics of char catalytic reforming of tar in two-stage fluidized bed[J]. CIESC Journal, 2017, 68(10): 3762-3769.

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两段流化床中半焦催化脱除焦油特性

Characteristics of char catalytic reforming of tar in two-stage fluidized bed

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