Biogas purification accounts for about 10% of the total power in some Western European countries (Germany, Denmark, Sweden, etc.). Biogas purification skills, such as pressurized water washing, chemical absorption, pressure swing adsorption and membrane separation, have been commercialized. Among them, pressurized water washing and pressure swing adsorption have the highest utilization rate in European biogas purification market, accounting for 1/3 of each.

在国内，沼气提纯技能近几年逐渐鼓起，但提纯的首要工艺，包含脱硫、脱碳和脱水，在合成氨等工业气体净化项目中早已应用广泛并开展成熟。

In China, the technology of biogas purification has been gradually developed in recent years, but the primary technology of biogas purification, including desulfurization, decarbonization and dehydration, has been widely used and developed in industrial gas purification projects such as synthetic ammonia.

脱硫方面，可分为干法和湿法两大类，其间干法以活性碳法和氧化铁法为主，湿法包含化学法、物理法和物化法。在硫含量低的情况下选用干法脱硫即可，硫含量高的情况下一般以湿式氧化法为主，并选用干法脱硫加以辅佐结合。

As for desulfurization, it can be divided into dry and wet methods, in which the dry method mainly consists of activated carbon method and iron oxide method, and the wet method includes chemical method, physical method and physical and chemical method. In the case of low sulfur content, dry desulfurization can be used. In the case of high sulfur content, wet oxidation is the main method, and dry desulfurization is used to assist the combination.

脱碳方面，首要有加压水洗法、变压吸附法、膜分离法等物理法和NDEA、碳酸丙烯酯等化学法，其间压力水洗法和变压吸附法是较为成熟和安稳的工艺，适用于大型沼气工程，运行可靠性高，工程经验多，压力水洗法甲烷回收率更具优势。

In terms of decarbonization, physical methods such as pressurized water washing, pressure swing adsorption, membrane separation and chemical methods such as NDEA and propylene carbonate are the main methods. Pressure water washing and pressure swing adsorption are mature and stable processes, which are suitable for large-scale biogas projects with high operational reliability, more engineering experience and more advantages in methane recovery by pressure water washing.

脱水方面，在国内的加气母站均设有脱水设备，一般选用物理吸附脱水法。

As for dehydration, there are dehydration equipments in domestic gas filling mother stations. Physical adsorption dehydration method is generally used.

经过上述工艺，可使净化气到达车用燃气规范，净化后的产品气可进入城市燃气管网。

Through the above process, the purified gas can reach the vehicle gas specification, and the purified product gas can enter the city gas pipeline network.

针对于以上的资讯，你有没有什么不同的意见呢?欢迎您致电我们或者点击我们的官方网站沼气提纯参与讨论!

For the above information, do you have any different opinions? Welcome to call us or click on our official website biogas purification to participate in the discussion!