化工学报 ›› 2012, Vol. 63 ›› Issue (4): 1083-1088.DOI: 10.3969/j.issn.0438-1157.2012.04.014

• 催化、动力学与反应器 • 上一篇    下一篇

离子液体-催化剂对甲基纤维素微波裂解产物分布的影响

杜军,柯改利,刘作华,刘仁龙,陶长元   

  1. 重庆大学化学化工学院,重庆 400044
  • 收稿日期:2011-10-05 修回日期:2012-01-10 出版日期:2012-04-05 发布日期:2012-04-05
  • 通讯作者: 杜军

Effects of ionic liquid and/or catalysts on product distribution of methyl cellulose pyrolysis by microwave

DU Jun,KE Gaili,LIU Zuohua, LIU Renlong,TAO Changyuan   

  1. College of Chemistry & Chemical Engineering, Chongqing University, Chongqing 400044, China
  • Received:2011-10-05 Revised:2012-01-10 Online:2012-04-05 Published:2012-04-05

摘要: 以离子液体1-丁基-3-甲基咪唑氯(IL)为添加剂、考察5A-Ca型分子筛、HNO3及FeCl3等催化剂对甲基纤维素(MC)微波裂解过程的影响。实验研究了IL用量、微波功率、作用时间及催化剂对MC裂解的影响,并通过GC-MS联用仪研究了微波裂解液体产物分布的变化。结果表明,不同催化剂导致了不同的液体产物分布,其中5A-Ca型分子筛催化剂可促进小分子物质的形成,同时使生物质油中的含氧量从37.43%降低到了34.82%;HNO3催化剂促进了醋酸甲酯、正丁醇及苯甲酸甲酯的生成;FeCl3作为催化剂时,促进了糠醛及5-甲基糠醛的生成。通过比较常规热解与微波裂解,发现微波裂解能在较短的时间内得到高的生物质油产率。

关键词: 甲基纤维素, 微波裂解, 催化剂, 离子液体

Abstract: Ionic liquid 1-butyl-3-methylimidazolium chloride(IL)was used as an additive for methyl cellulose(MC)pyrolysis under microwave irradiation.The effects of reaction conditions, including IL amount, microwave power and reaction time and catalysts FeCl3, HNO3 and 5A-Ca molecular sieve on MC pyrolysis were studied.The results show that components in bio-oils obtained vary with the catalysts. 5A-Ca catalyst could promote formation of small molecules and reduce the oxygen content in product from 37.43% to 34.82%. HNO3 catalyst could do that of methyl acetate, 1-butanol and methyl benzoate. Furfural and 5-methyl furfural are found for FeCl3 catalyst.Comparing with conventional pyrolysis, the microwave pyrolysis with IL as additive but without catalysts could have higher yields of bio-oil in a short time.

Key words: methyl cellulose, microwave pyrolysis, catalyst, ionic liquid

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