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›› 2011, Vol. 11 ›› Issue (2): 269-275.

• 过程与工艺 • 上一篇    下一篇

铁基化学链法调节合成气氢碳比及联产氢气的实验研究

苏玉琰 李松庚 宋文立 林伟刚   

  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 中国科学院过程工程研究所多相反应实验室,北京 100080 中国科学院过程工程研究所多相反应实验室 中国科学院过程工程研究所多相反应开放实验室
  • 收稿日期:2011-01-17 修回日期:2011-03-07 出版日期:2011-04-20 发布日期:2011-04-20
  • 通讯作者: 苏玉琰

Experimental Investigation on Iron Based Chemical Looping Process for Adjusting H2/CO Ratio in Syngas and Hydrogen Generation

SU Yu-yan LI Song-geng SONG Wen-li LIN Wei-gang   

  1. State Key Laboratory of Multi-phase Complex Systems, Institute of Process Engineering Multi-phase Reaction Laboratory, Institute of Process Engineering, Chinese Academy of Sciences Institute of Process Engineering, CAS Multi-phase Reaction Laboratory, Institute of Process Engineering Chinese Academic of Science
  • Received:2011-01-17 Revised:2011-03-07 Online:2011-04-20 Published:2011-04-20
  • Contact: SU Yu-yan

摘要: 利用固定床反应器考察了实验参数对调节用于费托合成的合成气中H2/CO及产氢的影响. 结果表明,500~800℃条件下,合成气(H2/CO为0.5)经过固定床反应器时,出口H2/CO可达0.87~0.53;通过在还原阶段通入适量水蒸汽,可有效提高调节H2/CO的能力,且能增加氧化阶段的产氢量. 此外,还原阶段加入水蒸汽还能有效抑制积碳生成,所制H2纯度接近100%. 在载氧体颗粒中加入石墨作为扩孔剂,可增强颗粒反应活性和稳定性,经过6个循环后,实际产氢量仍保持在理论产氢量的40%以上(不加石墨仅为20%)且仍保持一定的孔结构,而未加石墨的颗粒几乎完全烧结.

关键词: 化学链, 氢气, 合成气, 氢碳比, 积碳

Abstract: The influences of operation conditions on the iron base chemical looping hydrogen generation process for adjusting H2/CO ratio in syngas and hydrogen generation for Fischer-Tropsch (FT) synthesis were studied. The results show that when the H2/CO ratio is 0.5 in the syngas, the H2/CO ratio in exhaust gas varies from 0.87 to 0.53 as the temperature increases from 500 to 800℃. By adding suitable amount of steam in the reduction stage, the adjusting capacity can be enhanced dramatically and the hydrogen amount in the oxidation stage increases. The additional steam in the reduction stage can also restrain carbon deposition effectively and make the hydrogen purity approach 100%. The reactivity and recyclability can be enhanced by adding graphite as pore-forming additive. After 6 cycles, the practical hydrogen amount can still reach 40% of the theoretical amount for the particles with the graphite as additive (20% for original particles) and reserve pore structure after reaction while the particles without graphite are almost completely sintered.

Key words: chemical looping, hydrogen, synga, H2/CO ratio, carbon deposition

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