Heterogeneous acidic TiO2 nanoparticles for efficient conversion of biomass derived carbohydrates
作者:Chung-Hao Kuo、Altug S. Poyraz、Lei Jin、Yongtao Meng、Lakshitha Pahalagedara、Sheng-Yu Chen、David A. Kriz、Curtis Guild、Anton Gudz、Steven L. Suib
DOI:10.1039/c3gc40909k
日期:——
Selective conversion of biomass derived carbohydrates into fine chemicals is of great significance for the replacement of petroleum feedstocks and the reduction of environmental impacts. Levulinic acid, 5-hydroxymethyl furfural (HMF) and their derivatives are recognized as important precursor candidates in a variety of different areas. In this study, the synthesis, characterization, and catalytic activity of acidic TiO2 nanoparticles in the conversion of biomass derived carbohydrates were explored. This catalyst was found to be highly effective for selective conversion to value-added products. The nanoparticles exhibited superior activity and selectivity towards methyl levulinate from fructose in comparison to current commercial catalysts. The conversion of fructose to methyl levulinate was achieved with 80% yield and high selectivity (up to 80%). Additionally, conversions of disaccharides and polysaccharides were studied. Further, the production of versatile valuable products such as levulinic esters, HMF, and HMF-derived ethers was demonstrated using the TiO2 nano-sized catalysts in different solvent systems.
生物质衍生碳水化合物的选择性转化为精细化学品对替代石油原料和减少环境影响具有重要意义。戊酸、5-羟甲基糠醛(HMF)及其衍生物被认为是多种不同领域的重要前驱体候选物。本研究探讨了酸性TiO2纳米颗粒在生物质衍生碳水化合物转化中的合成、表征和催化活性。研究发现该催化剂在选择性转化为增值产品方面非常有效。与当前商业催化剂相比,这些纳米颗粒在果糖转化为甲基戊酸酯的活性和选择性方面表现出优越性。果糖转化为甲基戊酸酯的产率达到80%,且高选择性(高达80%)。此外,还研究了二糖和多糖的转化情况。进一步展示了在不同溶剂体系中使用TiO2纳米催化剂生产多种有价值产品,如戊酸酯、HMF和HMF衍生醚的可能性。