文献类型：期刊文献

英文题名：The importance of cobalt disulfide morphology for cellulose depolymerization: Hydrogenolysis versus acid catalysis

作者：Wu, Gang[1] Yang, Haojie[1] Gao, Wenran[1] Wang, Kui[2] Penzik, Maxim V.[3] Kozlov, Alexander N.[3] Li, Bin[4] Huang, Yong[1] Zhang, Shu[1] Zhang, Hong[1]

第一作者：Wu, Gang

通信作者：Huang, Y[1];Zhang, S[1]

机构：[1]Nanjing Forestry Univ, Coll Mat Sci & Engn, Jiangsu Coinnovat Ctr Efficient Proc & Utilizat Fo, Joint Int Res Lab Biomass Energy & Mat, Nanjing 210037, Jiangsu, Peoples R China;[2]Chinese Acad Forestry, Inst Chem Ind Forest Prod, Nanjing 210042, Jiangsu, Peoples R China;[3]Russian Acad Sci, Melentiev Energy Syst Inst, Siberian Branch, Irkutsk 664033, Russia;[4]Jiangsu Univ, Sch Energy & Power Engn, Zhenjiang 212013, Jiangsu, Peoples R China

年份：2022

卷号：167

外文期刊名：JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS

收录：;EI(收录号：20223412590150);Scopus(收录号：2-s2.0-85135922131);WOS:【SCI-EXPANDED(收录号:WOS:000868332100008)】；

基金：This work was financially supported by China MOST (2018YFE0183600) , Natural Science Foundation of Jiangsu Province (Grants No. BK20200794) , National Natural Science Foundation of China (Grants 51876093 and 52106249) , and the Startup Fund for Scientific Research of Nanjing Forestry University (Grant GXL2018033) .

语种：英文

外文关键词：Cellulose; Cobalt disulfide; Morphology; Hydrogenolysis; Acid hydrolysis

摘要：Acid-catalyzed hydrolysis and metal-catalyzed hydrogenolysis are two important methods for conversion of cellulose into high value-added chemicals, which preferentially use homogeneous acids and precious metals as catalysts, respectively. This paper reports that cobalt disulfide (CoS2) can be competent in both acid hydrolysis and hydrogenolysis reactions as an inexpensive heterogeneous catalyst by controlling its morphology. Two kinds of CoS2 with imperfect spherical (A-CoS2) and regular octahedral (Syn-CoS2) morphologies were tested in the conversion of 5-hydroxymethylfurfural (HMF) under a hydrogen atmosphere. Interestingly, A-CoS2 showed high activity in the hydrogenolysis of HMF to 2,5-hexanedione (2,5-HD) with a yield of 81.5 wt%, while Syn-CoS2 was responsible for the acid hydrolysis of HMF to methyl levulinate (ML) in high yield of 90.8 wt%. Characterization of the two catalysts suggested that Syn-CoS2 had higher Co2+/Co3+ ratio in comparison to A-CoS2, leading to a proportional difference in their acid site numbers. The unique activity of these two catalysts was also reflected in the conversion of cellulose. In particular, Syn-CoS2 exhibited high selectivity to ML formation from cellulose and good recyclability.