CO_2吸附强化模拟生物油重整制氢的实验研究

选用Ce-Ni/Co作催化剂、由醋酸钙煅烧制得的Ca O作重整催化剂、CO2吸附剂,进行模拟生物油吸附强化蒸汽重整制氢的研究.实验结果表明:在相同温度、M(S)/M(C)(加入水蒸气的摩尔质量与生物油模化物中碳的摩尔质量之比)条件下,吸附剂的加入有利于提高氢气摩尔分数和氢气产率;添加吸附剂后,随着温度的升高,氢气摩尔分数、氢气产率均呈现先增大后减小的趋势,在700℃时达到最大;随着M(S)/M(C)的增加,氢气摩尔分数先增大后减小,在M(S)/M(C)=9时氢气摩尔分数达到最大,而氢气产率则在M(S)/M(C)超过9后变化不大;随着M(Ca O)/M(C)(加入的氧化钙的摩尔质量与生物油模化物中碳的摩尔质量之比)的增加,氢气摩尔分数逐渐增大,达到M(Ca O)/M(C)=3后几乎不变,氢气产率则先增大后减小,在M(Ca O)/M(C)=3时达到最大;温度=700℃,M(S)/M(C)=9,M(Ca O)/M(C)=3为模拟生物油重整制氢的最佳条件,在此条件下氢气摩尔分数、氢气产率分别达到92.2%,84.1%.

Study on CO2 Sorption-Enhanced Steam Reforming of Bio-oil Model for Hydrogen Production

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.