燃料化学学报2017，Vol.45Issue(1)：55-64,10.
N-叔丁基-α-苯基硝酮对纤维素超临界乙醇液化产物分布的影响
Effects of N-tert-butyl-α-phenylnitrone on the product distribution of cellulose liquefaction in supercritical ethanol
摘要
Abstract
With N-tert-butyl-α-phenylnitrone ( PBN) as free radicals trapper, the effects of PBN dosage and reaction temperature on the product distribution and bio-oil component distribution of cellulose liquefaction in supercritical ethanol were investigated using an autoclave. The results showed that the yields of bio-oil and volatile compounds were 37. 17% and 50. 08% without PBN, respectively;meanwhile the highest yield of bio-oil increased to 48 . 35%, whereas the volatile compound yield decreased to 35 . 65% with the PBN dosage increased from 0 to 0. 4 g. With the increase of reaction temperature from 250 ℃ to 340 ℃, the cellulose conversion rate increased sharply from 23 . 10% to 88 . 92% while the bio-oil yield increased from 19 . 18% to 48. 35% (320 ℃) and the volatile compound yield increased from 6. 03% to 50. 28% quickly. The GC-MS results showed that the dominant compounds in bio-oil were esters, ketones, alkanes, alcohols, acids and benzenes with the highest relative contents of 27 . 91%, 15 . 77%, 13 . 44%, 12 . 42%, 16 . 07% and 19 . 81%, respectively. The present results proved that PBN has obvious effects on the product distribution and bio-oil component distribution of cellulose liquefaction in supercritical ethanol, especially PBN can enhance the transformation between bio-oil and volatile compounds via reacting with benzyl radicals, methyl radicals, ethyl radicals, etc. The transformation among dominant compounds in bio-oil can be regulated by varying PBN dosage and reaction temperature.关键词
纤维素/液化/超临界乙醇/N-叔丁基-α-苯基硝酮Key words
cellulose/liquefaction/supercritical ethanol/N-tert-butyl-α-phenylnitrone分类
能源科技引用本文复制引用
黎巍,汤楚翘,解新安,李雁,李璐,孙娇,樊荻,魏星..N-叔丁基-α-苯基硝酮对纤维素超临界乙醇液化产物分布的影响[J].燃料化学学报,2017,45(1):55-64,10.基金项目
The project was supported by the National Natural Science Foundation of China (21576107,21176097) and Guangdong Provincial Science and Technology Program Foundation of China (2014A010106024).国家自然科学基金(21576107,21176097)和广东省科技计划项目(2014A010106024)资助 （21576107,21176097）
