垃圾填埋场渗滤液催化超临界水气化制氢试验
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摘要
对垃圾渗滤液进行超临界水气化试验,考察不同催化剂K_2CO_3、Na_2CO_3、NaOH和KOH对H_2产率以及对渗滤液中COD、TOC、TN和NH_3-N去除率的影响。试验结果表明,在450℃、28 MPa、15 min的反应条件下,4种催化剂对H2产率的影响从大到小依次为NaOH、KOH、K_2CO_3和Na_2CO_3,且在NaOH添加量为5 g时,H_2体积分数达到最大值54.45%;在相同的反应条件下,渗滤液中COD、TOC、TN和NH_3-N的去除率均随着催化剂的加入而有明显上升。
An experiment of supercritical water gasifying with catalyst of landfill leachate was carried out and the effect of different catalysts K_2CO_3,Na_2CO_3,Na OH,and KOH on H_2 yield and the removal rate of COD,TOC,TN,and NH_3-N in leachate were investigated. The results show that under the reaction condition of 450℃,28 MPa,and 15 min,the order from large to small of the influence of the 4 catalysts on H_2 yield is Na OH,KOH,K_2CO_3,and Na_2CO_3. When the Na OH addition is 5 g,the volume percentage of H_2 reaches the maximum value of54. 45%. Under the same reaction condition,the removal rate of COD,TOC,TN,and NH_3-N increases obviously with the addition of catalyst.
An experiment of supercritical water gasifying with catalyst of landfill leachate was carried out and the effect of different catalysts K_2CO_3,Na_2CO_3,Na OH,and KOH on H_2 yield and the removal rate of COD,TOC,TN,and NH_3-N in leachate were investigated. The results show that under the reaction condition of 450℃,28 MPa,and 15 min,the order from large to small of the influence of the 4 catalysts on H_2 yield is Na OH,KOH,K_2CO_3,and Na_2CO_3. When the Na OH addition is 5 g,the volume percentage of H_2 reaches the maximum value of54. 45%. Under the same reaction condition,the removal rate of COD,TOC,TN,and NH_3-N increases obviously with the addition of catalyst.
引文
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[3]蒋宝军,赵玉鑫,陈玉婷.垃圾渗滤液臭氧氧化的铜镍负载型催化剂筛选[J].环境污染与防治,2015,37(8):1-6.(JIANG Baojun,ZHAO Yuxin,CHEN Yuting.Study on screening of Cu/Ni supported catalysts for treatment of landfill leachate[J].Environmental Pollution&Control,2015,37(8):1-6.(in Chinese)).
[4]刘理力,廖传华,陈海军.松木屑超临界水气化制甲烷产气性能试验[J].林业工程学报,2016,1(4):96-101.(LIU Lili,LIAO Chuanhua,CHENG Haijun.Experimental study on the methane production by gasification of pine sawdust in supercritical water[J].Journal of Forestry Engineering,2016,1(4):96-101.(in Chinese)).
[5]夏凤高,田森林,谷俊杰,等.褐煤超临界水气化制甲烷的催化剂比较研究[J].煤炭转化,2013,36(4):24-28.(XIA Fenggao,TIAN Shenlin,GU Junjie,et al.Sudy on catalysts for methane production from lignite gasification in supercritical water[J].Coal Conversion,2013,36(4):24-28.(in Chinese)).
[6]龚为进,魏永华,赵亮,等.生活垃圾填埋场渗滤超临界水氧化试验研究[J].水资源保护,2017,33(2):59-62.(GONG Weijin,WEI Yonghua,ZHANG Liang,et al.Experimental research on treatment of municipal waste landill leachate using supercritial water oxidation[J].Water Resources Protection,2017,33(2):59-62.(in Chinese))
[7]方明中,孙水裕,林楚娟,等.超临界水氧化技术在城市污泥处理中的应用[J].水资源保护,2008,24(3):66-68.(FANG Mingzhong,SUN Shuiyu,LIN Chujuan,et al.Application of the supercritical water oxidation technique to municipal sludge treatment[J].Water Resources Protection,2008,24(3):66-68.(in Chinese))
[8]CHENG Zening,JIN Hui,LIU Shanke,et al.Hydrogen production by semicoke gasification with a supercritical water fluidized bed reactor[J].International Journal of Hydrogen Engineering,2016,41(36):16055-16063
[9]GONG Yanmeng,WANG Shuzhong,XU Haidong,et al.Partial oxidation of landfill leachate in supercritical water:optimization by response surface methodology[J].Waste Management,2015,43:343-352.
[10]龚为进,魏永华,赵亮,等.垃圾渗滤液超临界水气化制氢影响因素分析[J].工业水处理,2016,36(12):86-89.(GONG Weijin,WEI Yonghua,ZHAO Liang,et al.Analysis on the influential factors of supercritical water gasification hydrogen production for landfill leachate treatment[J].Industrial Water Treatment,2016,36(12):86-89.(in Chinese))