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木质素是一种芳环结构来源丰富且价格低廉的可再生资源.每年制浆造纸工业和酶解纤维素制备乙醇工艺产生大量废弃木质素,但利用率只有2%.因此从资源利用和环境保护角度都应重视木质素(尤其是废弃木质素)的研究与应用.近几十年来,木质素转化的研究进展相对缓慢,主要的木质素解聚技术包括催化裂化、水解、金属(含硫和非硫)促进还原和氧化等.解聚产物加氢脱氧的精制技术包括气相和液相的金属(含硫和非硫)催化加氢脱氧酚类混合物为烷烃和芳烃等.本文从催化剂、反应条件、反应机理及催化剂失活等方面综述了国内外木质素解聚和解聚产物进一步加氢脱氧的主要进展及存在的主要问题,并针对当前的技术路线和未来的重点研究方向等提出了建议和展望.
Lignin is a rich source of aromatic ring structure and low-cost renewable resources.Every year the pulp and paper industry and enzymatic hydrolysis of cellulose production of ethanol produced a lot of waste lignin, but only 2% utilization.Therefore, from the utilization of resources and the environment In the aspect of protection, attention should be paid to the research and application of lignin (especially waste lignin) .In recent decades, the research on lignin conversion has been relatively slow. The main lignin depolymerization techniques include catalytic cracking, hydrolysis, metal (sulfur And non-sulfur) to promote reduction and oxidation, etc. Dehydration and depolymerization products hydrodeoxygenation purification technology, including gas phase and liquid phase metal (sulfur and non-sulfur) catalytic hydrodeoxygenation phenols mixture of alkanes and aromatics, etc .. This article from the catalyst, Reaction conditions, reaction mechanism and catalyst deactivation, the main progress and main problems of further hydrodeoxygenation of lignin depolymerization and depolymerization products at home and abroad are reviewed. In view of the current technical route and future research directions, Suggestions and Outlook.