不同钙基吸收剂对玉米秸秆热解气化制氢特性的影响

发布时间：2018-02-14 12:24

本文关键词： 玉米秸秆热解气化制氢煅烧石灰石煅烧碳酸钙煅烧白云石　出处：《可再生能源》2017年04期 　论文类型：期刊论文

【摘要】：为了揭示不同钙基吸收剂对生物质热解气化制氢特性的影响机理,以玉米秸秆为原料在一个两段式热解气化装置上研究了添加不同钙基吸收剂对其制氢特性的影响,结果表明:煅烧石灰石、煅烧碳酸钙和煅烧白云石等3种吸收剂的添加均可有效吸收玉米秸秆热解气化过程中生成的CO_2,促进水气变换(WGS)反应的平衡向右移动,从而生成更多H_2;同时,吸收剂的主要组分CaO还可催化玉米秸秆热解挥发分的裂解与气化反应以及WGS反应,从而显著提高产气中H_2的体积分数与产率。另外,煅烧白云石中的含镁组分还显示出对气化过程以及CO_2吸收具有进一步的催化作用,使得其在玉米秸秆热解气化过程中可获得更高的H_2体积分数(71.8%)和产率[224.5 m L/(g db biomass)]。
[Abstract]:In order to reveal the influence mechanism of different calcium based absorbents on the hydrogen production characteristics of biomass pyrolysis gasification, the effects of different calcium based absorbents on the hydrogen production characteristics of biomass were studied in a two-stage pyrolysis gasification plant using corn straw as raw material. The results show that the addition of calcined limestone, calcined calcium carbonate and calcined dolomite can effectively absorb CO _ 2 produced in the process of pyrolysis and gasification of corn straw, and promote the balance of water gas transformation to the right. Meanwhile, CaO, the main component of absorbent, can also catalyze the pyrolysis, gasification and WGS reaction of volatile compounds from corn straw, thus significantly increasing the volume fraction and yield of H _ 2 in gas production. The magnesium-bearing components in calcined dolomite also showed further catalytic effect on gasification process and CO_2 absorption, resulting in higher H-2 volume fraction 71.8% and yield [224.5 mL / g db biomass] during pyrolysis and gasification of corn straw.
【作者单位】：阳光凯迪新能源集团有限公司生物质热化学技术国家重点实验室;华中科技大学煤燃烧国家重点实验室;
【基金】：生物质热化学技术国家重点实验室开放基金项目国家自然科学基金项目(51306066)
【分类号】：TQ116.2

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