天然气中汞的脱除技术

Progress in mercury removal technologies for natural gas

鉴于环保、设备安全以及人身健康的要求,有效脱除天然气中汞的应用技术日渐受到重视。简述了物理吸附、化学吸附、溶液吸收和低温分离等具有代表性的天然气脱汞的工艺进展。对活性炭汞吸附剂、负载金属吸附剂、卤化或载硫活性炭和其他类型汞吸附剂在天然气中汞脱除的应用进展进行了阐述。研究了入口天然气的温度和湿度对脱汞效果的影响,较低的温度和湿度有利于汞的脱除。

The application techniques of effective removal of mercury in natural gas have received much attention due to the requirements for environmental protection,equipment safety and human health. In this paper,the advance in several typical removal technologies of mercury in natural gas such as physical adsorption,chemical adsorption,solution absorption and low temperature separation was briefly reviewed. The application progress in the existing mercury removal agents for the removal of mercury in natural gas, including active carbon mercury adsorbents,supported metal adsorbents,halogenated or sulfur loading active carbon and other mercury adsorbents,was summaried. The influence of temperature and humidity of natural gas in inlet on the effect of mercury removal was investigated. It was pointed out that low tempera-ture and humidity were benificial to mercury removal.