Abstract: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. Key words:internal circulation micro-electrolysis/ natural gas/ H2S/ response surface optimization.
图1内循环反应器结构图 Figure1.Schematic diagram of internal circulation reactor
图8铁炭比和通气速率对H2S去除率交互影响的响应曲面图和等高线图 Figure8.3D surface and contour of interaction between iron-carbon ratio and ventilation rate on H2S removal efficiency
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Department of Environmental Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China Received Date: 2019-05-30 Accepted Date: 2019-10-14 Available Online: 2020-03-25 Keywords:internal circulation micro-electrolysis/ natural gas/ H2S/ response surface optimization Abstract: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.