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    Process to Produce a Methane Rich Gas Mixture From Gasification Derived Sulphur Containing Synthesis Gases
    3.
    发明申请
    Process to Produce a Methane Rich Gas Mixture From Gasification Derived Sulphur Containing Synthesis Gases 审中-公开
    从气化衍生含硫合成气体生产甲烷富气混合物的工艺

    公开(公告)号：US20100205863A1

    公开(公告)日：2010-08-19

    申请号：US12668577

    申请日：2008-07-03

    申请人： Serge Biollaz ,  Tilman J. Schildhauer ,  Martin Seeman

    发明人： Serge Biollaz ,  Tilman J. Schildhauer ,  Martin Seeman

    IPC分类号： C10L3/06

    CPC分类号： C10G2/33 ,  C10G2/30 ,  C10G45/00 ,  C10G45/04 ,  C10G45/34 ,  C10G47/00 ,  C10G47/02 ,  C10G67/02 ,  C10G67/06 ,  C10G67/14 ,  C10J3/00 ,  C10J2300/1665 ,  C10J2300/1807 ,  C10L3/08 ,  C10L3/102

    摘要： A method for converting a raw gas into a methane-rich and/or hydrogen-rich gas includes the following steps: a) providing the raw gas stemming from a coal and/or biomass gasification process, thereby the raw gas comprising beside a methane and hydrogen content carbon monoxide, carbon dioxide, alkanes, alkenes, alkynes, tar, especially benzole and naphthalene, COS, hydrogen sulfide and organic sulfur compounds, especially thiophenes; thereby the ratio of hydrogen to carbon monoxide ranges from 0.3 to 4; b) bringing this raw gas into contact with a catalyst in a fluidized bed reactor at temperatures above 200° C. and at pressures equal or greater than 1 bar in order to convert the raw gas into a first product gas, thereby simultaneously converting organic sulfur components into hydrogen sulfide, reform tars, generate water/gas shift reaction and generate methane from the hydrogen/carbon monoxide content; c) bringing the first product gas into a sulfur absorption process to generate a second product gas, thereby reducing the content of hydrogen sulfur and COS from 100 to 1000 ppm down to 1000 ppb or less; d) optionally bringing the second product gas into a carbon dioxide removal process to generate a third product gas at least almost free of carbon dioxide; e) bringing the third product gas into a second methanation process to generate a fourth product gas having a methane content above 5 vol %; f) optionally bringing the fourth product gas into a carbon dioxide removal process to generate a fifth product gas at least almost free of carbon dioxide g) bringing the fifth product gas into an hydrogen separation process in order to separate a hydrogen rich gas from a remaining methane-rich gas, called substitute natural gas.

    摘要翻译： 将原料气体转化为富含甲烷和/或富氢气体的方法包括以下步骤：a）提供源自煤和/或生物质气化过程的原料气体，由此生成除了甲烷和 氢含量一氧化碳，二氧化碳，烷烃，烯烃，炔烃，焦油，特别是苯和萘，COS，硫化氢和有机硫化合物，特别是噻吩; 氢与一氧化碳的比例为0.3〜4; b）在高于200℃的温度和等于或大于1巴的压力下，使该原料气体与流化床反应器中的催化剂接触，以将原料气体转化为第一产物气体，从而同时转化有机硫 组分转化为硫化氢，改造焦油，产生水/气转换反应，并从氢/一氧化碳含量产生甲烷; c）使第一产物气体进入硫吸收过程以产生第二产物气体，从而将氢硫和COS的含量从100ppm降低至1000ppb以下; d）任选地使第二产物气体进入二氧化碳去除工艺以产生至少几乎不含二氧化碳的第三产物气体; e）使第三产物气体进入第二甲烷化过程以产生甲烷含量高于5体积％的第四产物气体; f）任选地使第四产物气体进入二氧化碳去除过程以产生至少几乎不含二氧化碳的第五产物气体g）使第五产物气体进入氢气分离过程，以将富氢气体与剩余的气体分离 富甲烷气，称为天然气替代品。