摘要
天然气已经成为工业生产中的重要能源,但天然气中含有大量的H2S,在加工运输过程中会造成管道腐蚀等问题。因此,天然气脱硫是其加工利用过程中重要的一步。将内循环微电解技术用于天然气中H2S的处理,分别考察了反应时间、通气速率、铁炭比和pH对H2S去除效果的影响,筛选出影响H2S去除效果的主控因子,采用Box-Behnken响应曲面法对处理H2S的反应条件进行了优化。最终确定的最佳反应条件:反应时间为30 min、通气速率为0.33 m3·h-1、铁炭比为3∶2和pH=6.1,在最佳反应条件下进行验证实验,结果表明,H2S的去除率可达到84.6%,其落在模型预测值的95%置信区间(80.16%~100%)内,经内循环微电解技术处理后,H2S含量能够达到《天然气》(GB 17820-2012)中三类标准。因此,内循环微电解技术可以有效地去除天然气中的H2S,研究结果可为内循环微电解应用于天然气中H2S的处理提供参考,同时为天然气中H2S的处理提供了一种简单高效的技术方法。
Natural gas has become an important energy in industrial production.However,H2S in natural gas will cause problems such as pipeline corrosion during processing and transportation.Therefore,the desulfurization from natural gas is a very important step in its processing and utilization.In this study,the internal circulation micro-electrolysis technique was applied to treating H2S in natural gas.Effects of reaction time,aeration rate,iron-carbon ratio and pH on H2S removal efficiency were studied.And the master factors affecting H2S removal were selected.The response surface method was used to optimize the reaction conditions for H2S treatment.The optimal reaction conditions were determined as follows:reaction time of 30 min,aeration rate of 0.33 m3·h-1,iron-carbon ratio of 3∶2 and pH=6.1.The verification test was carried out under the optimal reaction conditions,and the results showed that H2S removal rate could reach 84.6%,which fell within the 95%confidence interval(80.16%~100%)of the model prediction value.H2S content in natural gas could reach the third standard of Natural Gas(GB 17820-2012)after treatment by internal circulation micro-electrolysis technology.Therefore,the internal circulation micro-electrolysis technology can effectively remove H2S from natural gas.It can provide guidance for H2S treatment in natural gas,as well as a simple and efficient technical method.
作者
武传涛
韩严和
符一鸣
WU Chuantao;HAN Yanhe;FU Yiming(Department of Environmental Engineering,Beijing Institute of Petrochemical Technology,Beijing 102617,China)
出处
《环境工程学报》
CAS
CSCD
北大核心
2020年第3期721-729,共9页
Chinese Journal of Environmental Engineering
基金
国家自然科学基金资助项目(21677018)
北京市自然科学基金-市教委联合资助项目(KZ201810017024)。
关键词
内循环微电解
天然气
H2S
响应曲面优化
internal circulation micro-electrolysis
natural gas
H2S
response surface optimization
