Oxidative removal of a low concentration of CO from hydrogen was studied using a simulated moving bed reactor (SMBR) with 1wt% Pt/Al
2O
3 as a catalyst and adsorbent. Compared with an ordinary fixed bed reactor (FBR), SMBR showed higher CO removal when the ratio of the CO introduction rate to the active site moving rate (
mCO) was smaller than 1. The presence of H
2 enhanced the CO oxidation performance of FBR, whereas it barely affected the performance of SMBR. Effects of
mCO, ratio of O
2 introduction rate to active site moving rate (
mO2), H
2 concentration and O
2 concentration on CO removal and CO
x concentration in H
2 at the outlet of SMBR were investigated experimentally. The most important factor in order to enhance the CO removal was
mCO: CO was not detected at the outlets when
mCO was smaller than 1. The most important factor in order to enhance the CO
x concentration in H
2 at the outlet was
mO2: CO
2-free H
2 was obtained when
mO2 was larger than 1. H
2 concentration did not affect either the CO removal or the CO
x concentration in H
2 at the outlet. O
2 concentration affected
mCO and
mO2, which in turn influenced the CO removal and CO
x concentration in H
2 at the outlet.
抄録全体を表示