【摘要】 选聚酰亚胺中空纤维做分离材料,进行膜分离法脱除天然气中H2S的实验,气体分离以溶解-扩散机理进行。室内开展了进气流量、膜两侧压差、温度变化等几组实验,研究了进气流量、膜两侧压差对脱硫率的影响,H2S传质通量与传质系数的影响因素及温度变化对分离效果的影响。结果表明,脱硫率随进气流量提高而降低;膜两侧压差对脱硫率影响显著,提高膜两侧压差有助于增强H2S传质,但烃损失率增加;分离系数α与温度关系不大。实验条件下,对H2S含量为296mg/m3的原料气,单级膜组件脱硫率可达97%,产品气H2S含量低于管输标准。该实验提供了从天然气中脱除H2S的一种有效方法。更多还原

【Abstract】 Hollow polyimide fibers are selected as separation material to carry out the experiment of membrane separation approach used in H2S removal from natural gas,and the principle is solution-diffusion mechanics.Several groups of experiment of different inlet velocity,membrane pressure difference and temperature transfer are carried out,in order to study inlet velocity and membrane pressure difference influences on desulfuration efficiency,the influencing factors of H2S mass flux and mass coefficient and the impact of temperature transfer on separation efficiency.The experiment results prove that the desulfuration efficiency decreases following with the accretion of inlet velocity.The membrane pressure difference is the dominant influencing factor in desulfuration efficiency.The increasing of membrane pressure difference is in favor of enhancing H2S mass transfer,however,CH4 loss ratio increases.The calculation results show that the separation parameter has little to do with temperature transfer.Under experimental conditions,with the inlet gas H2S 296mg/m3,the desulfurization efficiency of 97% is attained through single-stage membrane module,and product gas H2S content is below the pipeline transportation standards.The experiment provids a effective way of removing H2S from natural gas.更多还原