摘要
采用自制的固定吸附床吸附装置,对碱浸渍活性炭脱除沼气中硫化氢的动态吸附进行了初步研究。研究结果表明,随着浸渍液pH值的升高,碱浸渍活性炭对硫化氢的吸附容量增加。pH值为8.0,10.0和12.0时的硫化氢吸附容量分别为2.37,4.96和9.33 mg·g^(-1)。利用Weber-Morris孔扩散模型,Boyd准一级颗粒扩散模型和Dumwald-Wagner模型研究了改性活性炭吸附硫化氢的吸附动力学行为,发现活性炭表面性质的改变,使边界条件的影响减小,削弱了气膜扩散的影响。Boyd准一级颗粒扩散模型描述硫化氢在碱浸渍活性炭上的整个吸附行为较其它两个模型准确。
Effects of pH on diffusion activities of H2 S in activated carbon impregnated by KOH aqueous solution were stud- ied in this paper. Results showed that adsorption capacity of H2 S increased with the increase of pH. The adsorption capaci- ty of H2 S were 2.37 mg g - 1,4.96 mg g -1 and 9.33 mg g-1 in KOH impregnated activated carbon under pH of 8.0, 10.0 and 12.0, respectively. The Pore diffusion model of Weber-Morris, the pseudo-first order particle diffusion model of Boyd , and the kinetic diffusion models of Dumwald-Wagner, were used to analysis effects of pH on H2S diffusion activi- ties, and found that the surface properties of activated carbon changed by the KOH impregnation, reduced the influence of boundary conditions and gas film diffusion. The Boyd model could describe the adsorption process better than the other two models.
作者
史风梅
裴占江
王粟
高亚冰
左辛
卢玢宇
刘杰
SHI Feng-mei PEI Zhan-jiang WANG Su GAO Ya-bing ZUO Xin LU Bin-yu LIU Jie(Rural Energy Institute of Heflongjiang Academy of Agricultural Sciences, Harbin 150086, China)
出处
《中国沼气》
北大核心
2017年第2期81-85,共5页
China Biogas
基金
哈尔滨市科技创新人才项目(2015RAQXJ056
2016RAQYJ070)
黑龙江省农业科学院引进博士人员科研启动金(201507-37)
"十三五"国家重点研发计划项目(2016YFD0501400)
"十二五"国家科技支撑项目(2015BAD21B00)
黑龙江省留学归国基金项目(LC2013C07)
黑龙江省青年科学基金项目(QC2014C031)
黑龙江省博士后科研启动项目(LBH-Q13150)
黑龙江省博士后基金项目(LBH-Z15199)
哈尔滨市青年科技创新人才(2013RFQYJ172)
