摘要
在小型鼓泡流化床反应器中,对添加CaO催化剂的松木锯末进行了快速热解制备生物油的研究。热解蒸汽采用多级冷凝,以尽可能回收更多的液体产物,同时实现液体产物的初步切割分馏。其中第一级冷凝采用循环冷却介质进行喷淋激冷,第二、三级分别采用间壁式水冷和冰浴冷却,收集到的液体产物依次命名为生物油1、生物油2和生物油3。研究表明:加入CaO后,生物油1、2和3中的含水率依次增加,热值依次降低;酸度明显下降,酮类和烃类增加,酚类减少。室温下放置30 d后,生物油中酚类含量增加(当CaO含量为30%时,酚类增加尤其明显,约50%),同时酯类含量减少,水含量增加。
The effects of CaO on fast pyrolysis of pine were investigated in a small bubbling fluidized bed reactor.The generated pyrolysis vapor was condensed by three-stage cooling： quench with coolant at the first stage,water cooling with shell-and-tube heat exchanger at the second stage,and ice bath cooling at the last stage.The liquids obtained from each stage were named bio-oil 1,bio-oil 2 and bio-oil 3,correspondingly.It was found that with the addition of CaO to pine,the water content in bio-oils increased,the heating value decreased,the pH increased,the content of ketones and hydrocarbons increased while phenols decreased.The bio-oils stability tests showed that phenols content increased（increased to 50 % when 30 % of CaO is added）,esters decreased and the water content increased after the bio-oils stored for 30 days at room temperature.
出处
《生物质化学工程》
CAS
2013年第4期1-6,共6页
Biomass Chemical Engineering
基金
国家863计划资助(2012AA051801)
