关键词: 低温甲醇洗, 煤化工, 甲醇, 合成氨, 合成天然气

Abstract: Rectisol technology licensed by both Linde AG and Lurgi AG is a gas purification method of removing acid gases including CO2，H2S，COS, by using cold methanol as solvent. Because of its excellent properties of selectivity, absorbency and operation stability, rectisol technology has been used in many fields, such as petrochemical, coal chemical, chemical fertilizer industries. In order to get comprehensive understanding of Rectisol technology, in this paper the performance characteristics of Rectisol technology and its existing problems in industrial applications are introduced. The progress in applications of rectisol technology is summarized in the coal chemical industry, especially in the area of coal to methanol, coal to synthetic ammonia and coal to synthetic natural gas. In addition, the development trends of rectisol technology are also proposed. As for coal to methanol, rectisol technology has unique advantage in removing acid gas from the synthesis gas. As for coal to synthetic ammonia, it has great significance for energy saving and consumption reduction. As for coal to synthetic natural gas, it has also a good application potential in purification process, such as removing H2S, COS from the synthesis gas. In the future, attentionshould be paid to developing China’s acid gas removal process with independent intellectual property right.

Key words: rectisol, coal chemical industry, methanol, synthesizing ammonia, synthetic natural gas