热重分析发现活性纤维素的生成始于530 K左右,对应于失重图上的肩部及SDTA曲线中强烈的放热峰.在辐射加热闪速热裂解试验台上获取了一种可溶于水、高温下易分解、室温下呈固态且稳定存在的黄色中间产物.扫描电镜图片证明在热裂解初期纤维素经历了一个熔化和相互粘结的状态,产物的红外谱图证实了大量的羰基和羧基官能团的生成.高效液相色谱分析证明其主要成分是一系列聚合度不同的低聚糖,推断该低聚糖即为活性纤维素.
参考文献
| [1] | Bradbury A W;Sakai Y;Shafizadeh F A .Kinetic Model for Pyrolysis of Cellulose[J].Journal of Applied Polymer Science,1979,23(11):3271-3280. |
| [2] | Broido A;Nolson M A .Char Yield on Pyrolysis of Cellulose[J].Combustion and Flame,1975,24:263-268. |
| [3] | Boutin O;Ferrer M;Lede J .Radiant Flash Pyrolysis of Cellulose:Evidence for the Formation of Short Life Time Intermediate Liquid Species[J].Journal of Analytical and Applied Pyrolysis,1998,47(01):13-31. |
| [4] | Boutin O.;Ferrer M.;Lede J. .Flash pyrolysis of cellulose pellets submitted to a concentrated radiation: experiments and modelling[J].Chemical Engineering Science,2002(1):15-25. |
| [5] | Jacques Lede;Fabrice Blanchard;Olivier Boutin .Radiant flash pyrolysis of cellulose pellets: products and mechanisms involved in transient and steady state conditions[J].Fuel,2002(10):1269-1279. |
| [6] | Piskorz J;Majerski P;Radlein D et al.Flash Pyrolysis of Cellulose for Production of Anhydro-Oligomers[J].Journal of Analytical and Applied Pyrolysis,2000,56(02):145-166. |
| [7] | 王树荣,廖艳芬,骆仲泱,文丽华,岑可法.氯化钾催化纤维素热裂解动力学研究[J].太阳能学报,2005(04):452-457. |
| [8] | Blasi C D .Comparison of Semi-Global Mechanisms for Primary Pyrolysis of Lignocellulosic Fuels[J].Journal of Analytical and Applied Pyrolysis,1998,47(01):43-64. |
| [9] | Arseneau D F .Competitive Reactions in the Thermal Decomposition of Cellulose[J].Canadian Journal of Chemistry,1971,49(04):632-638. |
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