Method for preparing highly-pure and ultra-pure hydrogen through purifying hydrogen from coal based syngas

• Main Authors: GAO SONG, QIU CHANGCHUN, JI GUODONG, YU YANG, LIU WANNAN, CONG WEIJUN, YUE YUN
• Format: Patent
• Language: Chinese; English
• Published: 05.12.2017
• Subjects: CHEMISTRY; COMPOUNDS THEREOF; INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OFSOLID INORGANIC COMPOUNDS; INORGANIC CHEMISTRY; METALLURGY; NON-METALLIC ELEMENTS

The invention relates to a method for preparing highly-pure and ultra-pure hydrogen through purifying hydrogen from coal based syngas, and belongs to the field of chemical engineering for coal chemical industry produced synthetic gas. The method mainly comprises two sequentially carried steps of filtration and adsorption; the filtration is carried out through removing solid particles, oil and water from the coal based syngas by a filtering device; and the adsorption is carried out through deeply removing impurities comprising O2, H2O, CO2, CH4, N2 and CO from the coal based syngas by an adsorbing device. The method for purifying the coal based syngas has the advantages of high purifying efficiency, low device cost, simple purifying conditions, and realization of the large-scale purifying production process; a variable pressure adsorption process adopts six-tower purification, one of the six towers works as a reactor (to absorb impurities), other four towers can respectively realize pressure equalizing, the re