Ca(OH)_2对污泥中制取富氢气体的影响  

Effect of Ca(OH)_2 on Production of Hydrogen-enriched Gas from Urban Sludge

作　　者：王志锋[1] 韩丽娜[2] 梁鹏[3] 程乐明[2] 毕继诚[2] 

机构地区：[1]中国兵器科学研究院宁波分院,浙江宁波315103 [2]中国科学院山西煤炭化学研究所煤转化国家重点实验室,山西太原030001 [3]山东科技大学化学与环境工程学院,山东青岛266510

出　　处：《山东科技大学学报（自然科学版）》2009年第1期46-50,共5页Journal of Shandong University of Science and Technology(Natural Science)

基　　金：煤转化国家重点实验室开放基金项目(08-202);宁波市自然科学基金项目(2007A610059)

摘　　要：以城市污泥转化为富氢气体为目的,使用超临界水(SCW)间歇反应器,以Ca(OH)2为催化剂,主要考察了Ca/C摩尔比、反应温度对城市污泥在SCW条件下生成的气体组成、碳转化率以及CO2吸收率等的影响。实验结果表明,随着Ca/C摩尔比的增加,气相产物中的CO2可以得到有效固定,同时促进碳转化率和H2产率升高。在600℃、30 MPa的条件下,当Ca/C摩尔比为0.6时,CO2的吸附率达到95%,H2含量比Ca/C比为0时提高14.7%。随温度升高,碳转化率和H2的体积分率逐渐增加,Ca的利用率也逐渐增大。温度为680℃时,CO2吸附率达到99%,H2含量达到43.7%。Ca(OH)2的催化作用在高温下更加显著。The hydrogen-enriched gas production from urban sludge was studied at present by using a supercritical water batch reactor where Ca（OH）a was used as catalyst. The effects of Ca/C molar ratio, reaction temperature on the gas composition, carbon conversion and CO2 absorptivity generated from urban sludge under the condition of su- percritical water were studied. The results showed that CO2 could be fixed effectively with the Ca/C molar ratio in- crease and also promoting the increase of carbon conversion and H2 yield. When Ca/C molar ratio was 0.6, with temperature of 600 ℃ , pressure of 30MPa, about 95% of CO2 was fixed and the volume fraction of hydrogen in gas product was increased by 14. 7% compared with Ca/C molar ratio of 0. With temperature increase, carbon conver- sion, volume fraction of hydrogen in gas product and availability of Ca were all increased gradually. When tempera- ture was 680 ℃, about 99% of CO2 was fixed, and the volume fraction of hydrogen in gas product was about 43.7%. The catalysis of Ca（OH）2 was more significant at high temperature.

关 键 词：CA(OH)2 超临界水 城市污泥 富氢气体 

分 类 号：TQ353.6[化学工程]