Abstract: With Ce-Ni/Co as reforming catalyst and CaO from calcination of calcium acetate as CO₂ adsorbent， the sorption-enhanced steam reforming of bio-oil for hydrogen production was studied. The results show that the addition of CO₂ sorbent can effectively promote the hydrogen molar fraction and hydrogen yield compared with the case without CO₂ sorbent under the same temperature and M(S)/ M (C) ratio (the molar mass of steam to carbon in the model compounds of bio-oil ). When the CO₂ sorbent existed， the hydrogen molar fraction and yield increased first，then decreased with the increase of the reforming temperature， and reached the maximum at 700℃. With the increase of M(S)/M(C) ratio， the hydrogen molar fraction increased first，then decreased， and was the largest at the M(S)/M(C) ratio of 9，while the hydrogen yield increased till the M(S)/M(C) ratio reached 9， then changed slightly. With the increase of M(CaO)/M(C) ratio ( the molar mass of calcium oxide to carbon in the model compounds of bio-oil)， the hydrogen molar fraction increased gradually， but changed slightly after the M(CaO)/M(C) ratio reached 3， while the hydrogen yield increased first and then decreased， reached the maximum at the M(CaO)/M(C) ratio of 3. The optimum conditions for steam reforming of bio-oil with CO₂ sorption are 700℃， M(S)/M(C)=9 and M(CaO)/M(C)=3， where the hydrogen molar fraction and the hydrogen yield are 92.2% and 84.1% respectively.

Key words: bio-oil, model compounds, steam reforming, hydrogen production, CO₂ sorption