生物质裂解油老化行为与机理研究  

Aging behavior and mechanism of bio-oil

作　　者：熊万明[1] 傅尧[1] 陆强[1] 郭庆祥[1] 

机构地区：[1]中国科学技术大学安徽省生物质洁净能源重点实验室,合肥230026

出　　处：《科学通报》2009年第15期2188-2195,共8页Chinese Science Bulletin

基　　金：国家重点基础研究发展计划资助项目(编号:2007CB210205)

摘　　要：在普通加热方式的基础上,采用微波和氧气辅助的方式对生物油老化行为进行了研究,并采用质谱仪(MS)和荧光显微镜对老化油进行了表征.通过比较生物油老化前后的成分及其含量变化,并根据该变化对生物油老化的机理进行了初步的研究.结果表明,老化油容易分层,其物理特性和成分变化较大,且空气中的氧气会加速其老化;经过老化处理,生物油中可测组分的绝对含量降低到原来的40%左右,而含有醛基和烯基的化合物的含量下降到原来的10%以下,加入一定量的过氧乙酸或酸碱会加剧这种变化;在生物油老化过程中以聚合反应为主,并伴有一定量的缩合和酯化反应.因此,采用隔绝空气和除去生物油中的酸可以有效地延缓和抑制老化反应的发生.On the basis of direct heating, microwave-assisted and oxygen-injected treatments were introduced to accelerate the aging of bio-oil, and the mass spectrometry （MS） and microscopy were employed to characterize the aged bio-oils. According to the components distribution results of bio-oil before and after the aging treatment, a preliminary aging mechanism of bio-oil was investigated. The results show that the properties and components of aged bio-oil changed significantly; the aged oil was easy to layer, and oxygen, acids or bases would accelerate the aging. After the aging treatment, the absolute content of detectable components of aged bio-oil decreased by 40% compared with that of the raw bio-oil, and even that of the compounds containing alkenyl and aldehyde groups was reduced to below 10%. These changes would be exacerbated by adding a certain amount of peroxyacetic acid, acids or bases. The main reactions involved in the aging process of bio-oil were polymerization, accompanied with a certain amount of condensation and esterification. Therefore, isolation from the air and removal of the acids in bio-oil could be effective in delaying and inhibiting the aging.

关 键 词：生物油 老化 聚合 洁净能源 

分 类 号：TE667[石油与天然气工程—油气加工工程]