填料塔中碳酸丙烯酯脱除沼气中的CO_2  

The removal of carbon dioxide in biogas by propylene carbonate in packed column

作　　者：聂红[1] 江皓[1] 种道文 吴全贵[2] 徐春明[1] 周红军[1] 

机构地区：[1]中国石油大学(北京)新能源研究院,北京102249 [2]中国石油大学(北京)非常规油气技术有限公司,北京102200

出　　处：《可再生能源》2013年第3期86-90,共5页Renewable Energy Resources

基　　金：国家高技术研究发展"863"计划(2012AA063507);国家科技支撑计划项目(2011BAD15B02);中国石油大学(北京)科研基金项目(YJRC-2011-09)

摘　　要：以木薯渣发酵产生的沼气为原料气,采用10 m3/d脱碳工艺试验装置,以碳酸丙烯酯为吸收剂脱除沼气中的CO2,分别考察了吸收气液比、吸收压力、吸收温度、空气气提气液比、原料沼气中硫化氢浓度对脱碳效果的影响。试验结果表明,吸收气液比为55、吸收压力为800 kPa、吸收温度15℃、空气气提气液比为10时,净化气中CO2浓度为(6.44±0.34)%,CO2脱除率为(92.48±0.39)%。原料沼气中H2S浓度对碳酸丙烯酯的脱碳效果影响显著,当H2S浓度增加到0.4%时,与以脱硫后沼气为原料气时的脱碳情况相比,净化气中CO2浓度增加了1.66%。Utilizing biogas from fermentation of cassava residues as raw gas, the effects of remov- ing carbon dioxide by propylene carbonate was studied on a decarburization test device with pro- cessing capacity of 10 m3/d. The influence factors of absorption gas liquid ratio, absorption pressure, absorption temperature, air stripping gas liquid ratio and concentration of hydrogen sulfide on the carbon dioxide removal process were investigated respectively. Results showed that when absorption gas liquid ratio was 55, absorption pressure was 800 kPa, absorption temperature was 15℃ and air stripping gas liquid ratio was 10, the concentration of carbon dioxide in product gas reached（6.44±0.34） % and the removal rate of carbon dioxide attained（92.48±0.39）%. Existence of hydrogen sulfide in biogas had a significant impact on the carbon dioxide removal. When the concentration of hydrogen sulfide increased to 0.4% in raw gas, carbon dioxide content in product gas increased by 1.66% comparing with the experiment using desulfurized biogas.

关 键 词：沼气 碳酸丙烯酯 CO2 H2S 

分 类 号：TK6[动力工程及工程热物理—生物能] S216.4[农业科学—农业机械化工程]