Steam methane reformer-pressure swing adsorption

Hydrogen Liquefaction. Hydrogen can be produced from caustic—chlorine electrolytic cells, by decomposition of ammonia or methanol, or by steam—methane reforming. Hydrogen recovered by these methods must be further purified prior to Hquefaction. This is generally achieved by utilizing pressure swing adsorption methods whereby impurities are adsorbed on a soHd adsorbent. 

SMR—steam methane reformer ATR—auto thermal reformer POX—partial oxidation PSA—pressure swing adsorption... 

Steam methane reforming 93 Pressure-swing adsorptive reactor (PSAR)... 

SERP. See adsorption, pressure swing SE-SMR. See sorption-enhanced steam methane reforming process Shanxi New Style Fuel and Stove Company, 520... 

After the development of pressure swing adsorption (PSA) units in the 1970 s, it became possible to operate the steam reformer in hydrogen plants at lower steam to carbon ratios. Before then, high steam to carbon ratios were required in order to limit the amount of methane in the product hydrogen. Decreasing the steam to carbon ratio below a certain level makes it impossible to use conventional iron-chromium high temperature shift catalysts due to the risk of the Fischer-Tropsch reaction (Hoejlund Nielsen et al., 1982). Instead, copper-based or copper-promoted shift catalysts may be used (Dybkjaer, 1981 and (Boegild Hansen et al., 1990). 

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