Acid-Free Conversion of Cellulose to 5-(Hydroxymethyl)furfural Catalyzed by Hot Seawater
Acid-Free Conversion of Cellulose to 5-(Hydroxymethyl)furfural Catalyzed by Hot Seawater
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热海水催化纤维素无酸转化为 5-(羟甲基)糠醛
DOI：
10.1021/acs.iecr.8b00443
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发表时间：
2018-02
影响因子：
4.2
通讯作者：
Wang Yanqin
中科院分区：
文献类型：
--
作者：
Li Xiangcheng;Zhang Yayun;Xia Qineng;Liu Xiaohui;Peng Kaihao;Yang Sihai;Wang Yanqin
将来自可再生生物质的纤维素转化为关键的平台化学品5-羟甲基糠醛（HMF）对于许多生物产品和生物燃料的生产至关重要。已经开发了用于该过程的各种酸性催化剂;然而，大多数系统效率低且可持续性差。在这里，我们报告的无酸转化成HMF的纤维素在两相系统的四氢呋喃/浓海水。HMF的产率达到48.6%，该体系具有良好的可重复使用性和可持续性。我们发现，氯离子（Cl-）可以通过1，2-氢化物移位途径促进葡萄糖的异构化，并加速果糖的脱水，从而驱动HMF的选择性形成。这种简单的系统能够将原料生物质转化为糠醛和HMF，其中木质素残留物通过连续的催化升级转化为有用的烷烃，为木质纤维素生物质的全面增值铺平了新的经济可行的途径。
The conversion of cellulose from renewable biomass into the key platform chemical, 5-hydroxymethylfurfural (HMF), is of fundamental importance to the production of numerous bioproducts and biofuels. Various acidic catalysts have been developed for this process; however, most systems suffer from low efficiency and poor sustainability. Here, we report an acid-free conversion of cellulose into HMF in a biphasic system of tetrahydrofuran/concentrated seawater. The yield of HMF reached 48.6%, and this system has excellent reusability and sustainability. We found that the chloridions (Cl–) can promote the isomerization of glucose via a 1,2-hydride shift path and accelerate the dehydration of fructose, thus driving the selective formation of HMF. This simple system is capable of converting raw biomass to furfural and HMF with the lignin residues transformed into useful alkanes via a sequential catalytic upgrading, paving a new economic-viable pathway for the full valorization of lignocellulosic biomass.