关键词:

PEMFC, 甲烷, 重整, CO, 变压吸附

Abstract:

To meet the conditions of PEMFC application, a hydrogen production system including natural gas steam reforming, water gas shift reaction and pressure swing adsorption (PSA) purifying process has been developed.The conditions of steam reforming and PSA process were especially studied.The effects of temperature, space velocity and steam to carbon ratio on reforming process were investigated and the optimal process operating conditions were acquired.When temperature was 650℃, steam to carbon ratio was 6 and space velocity was 42 h^-1, the hydrogen content in product gas was 70.21% and methane conversion was 77.41%.The effects of temperature and velocity on the PSA process used to remove CO were analyzed.When the pressure was 0.2 MPa, the temperature was 40℃ and the adsorption and desorption time was 120s individually，the CO content in product gas could be lower close to 1×10^-6.After rotating several periods, the quality of the product gas was stable.Highly pure hydrogen which satisfies the requirements of 80W PEMFC could be acquired continually.

Key words:

PEMFC, 甲烷, 重整, CO, 变压吸附