Chemical composition of bio-oils produced by fast pyrolysis of two energy crops

被引：297

作者：

Mullen, Charles A. ^{[1
]}

Boateng, Akwasi A. ^{[1
]}

机构：

[1] USDA ARS, Eastern Reg Res Ctr, Wyndmoor, PA 19038 USA

来源：

ENERGY & FUELS | 2008年 / 22卷 / 03期

关键词：

D O I：

10.1021/ef700776w

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

Bio-oils from the fast pyrolysis of switchgrass forage and two sets of alfalfa stems (from two stages of development-bud and full flower stages) have been analyzed by wet-chemical methods, GC-MS, and HPLC. The chemical composition of bio-oil is important because it may give insights into its quality, stability, or suitability for downstream upgrading. Pyrolysis experiments were conducted at 500 degrees C under a nitrogen atmosphere in 2.5 kg/h fluidized bed reactor. A total of 62 chemical species were positively identified in the liquids. Of the identified compounds, 27 have been quantified. The chemical compositions of the bio-oils are compared with what is known about the compositions of these feedstocks. While the compositions of the bio-oil from the two alfalfa stems were similar, there were numerous differences in the compositions of the alfalfa and switchgrass bio-oils. Noted are the higher levels of nitrogen, water, and aromatic hydrocarbons in bio-oils produced from alfalfa stems than from switchgrass and woody feedstocks that have been previously characterized. Also noted is a much lower concentration of levoglucosan and hydroxyacetaldehyde concentrations among bio-oils from alfalfa stems compared with bio-oil from switchgrass or woody biomass.

引用

页码：2104 / 2109

页数：6

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