LARGE SCALE CO SEPARATION BY VPSA USING CUCL/ZEOLITE ADSORBENT

摘要

Based on the principles that cuprous ions can form complex with carbon monoxide and salts can spontaneously disperse onto the surface of supports as a monolayer, a highly efficient CO adsorbent, CuCl/Zeoilte, has been made by heating a mixture of CuCl and a zeolite at a suitable temperature to disperse the CuCl onto the surface of the zeolite.This adsorbent has high CO adsorption capacity (＞50ml/g at 1 atm. and ambient temperature) and high CO selectivity over H2, N2, CH4 and CO. Using this adsorbent in a VPSA process, a large scale plant has been designed and built in China for separation of CO from syngas. The feed gas contains about CO 30%, H2 41%, N2 17%,CO2 8%, CH4 2%, O2 0.4%,and saturated water. The plant can produce carbon monoxide 1700m3 per hour with purity ＞99% and recover ＞85%.