沙柳在离子液体中催化裂解及产物分析的研究 【化工专业毕业论文】.docVIP

本科毕业论文 沙柳在离子液体中催化裂解及产物分析的研究 Study on the catalytic cracking of Salix psammophila in ionic liquids and product analysis 学 院：理学院 专 业：应用化学 姓 名： 学 号： 指导教师： 职 称：副教授 论文提交日期：二Ο一五年六月 摘 要 在环境与能源问题日趋严重的今天,可持续发展成了维护人类社会发展的重要战略方针，寻找新能源成为当务之急。纤维素是自然界中分布最为广泛的、储量最大的天然可再生资源,具有环境友好、生物相容性、易于改性等优点,被认为是未来能源和化工领域的主要原料。但是,由于纤维素分子间与分子内存在大量的氢键,难以实现熔融加工以及溶解再生,在以纤维素为原料制备各种先进功能材料的过程中尚存在着巨大挑战。同时,如何充分高效地利用纤维素并拓展其在先进材料领域的应用也是值得重点关注的课题。 离子液体作为一种环境友好型绿色溶剂，因其独特的物理化学性质，在纤维素和木质素的催化裂解中得到广泛应用。本文主要以沙柳为研究对象,探索其在离子液体（1-烯丙基-3-甲基咪唑氯盐）中的催化液化反应。实验得知：离子液体与沙柳的质量比越大，沙柳的液化率越高；反应的温度越适宜，沙柳的液化率越高。对离子液体液化沙柳的液化产物进行红外谱图分析得到，液化产物含有-OH(羟基)C=O(羰基)，为后续的研究工作提供了参考数据。 关键词：离子液体；沙柳；溶解；催化裂解 Study on the catalytic cracking of Salix psammophila in ionic liquids and product analysis Abstract Nowadays, the fuel and environment crisis become more and more serious, so sustainable development has been an important strategy of human society. Cellulose, which is the most abundant natural renewable resources in the world, has been regarded as the main raw materials of the future energy and chemical industry because of its environmentally friendly, biological compatibility and easily modified. The stiff molecular chain and close chain packing through numerous hydrogen bonds in cellulose have made its dissolution in most common solvents a difficult process. Therefore, the preparation of various advanced functional materials based on cellulose is still a significant challenge. The full and efficient use of cellulose and expand its application in advanced materials are important topics in cellulose study. In the paper, as the main research object of Salix psammophila，exploration of the lignin and the cellulose in ionic liquids and catalytic cracking. Ionic liquid-s，as a kind of environmentally friendly solvent，are widely applied in catalytic pyrolysis of cellulose and lignin with their particular physicochemical properties． In th paper，after a brief introduction of the composition and structure of ligni