Laboratory of Basic Research in Biomass Conversion and Utilization, University of Science and Technology of China, Hefei 230026, PR China.
Laboratory of Basic Research in Biomass Conversion and Utilization, University of Science and Technology of China, Hefei 230026, PR China; Institute of Energy, Hefei Comprehensive National Science Center, Hefei 230031, PR China.
Bioresour Technol. 2021 Feb;321:124443. doi: 10.1016/j.biortech.2020.124443. Epub 2020 Nov 25.
Non-noble bimetallic nanoparticles anchored on Zeolitic Imidazolate Frameworks, bifunctional ReMo@ZNB catalyst, has been demonstrated to promote Kraft lignin depolymerization. In this study, the catalytic activities under different heat treatment conditions are ranked as follows: ReMo@ZNB-700 (Air) > ReMo@ZNB-500 (Air) > ReMo@ZNB-700 (N). Particularly, bimetallic ReMo nanocatalyst with Re/Mo atomic ratio of 1/3 shows superior performance. Excellent yields of Ethyl acetate soluble products (92.18%) and Petroleum ether extracted biofuels (78%) are obtained at 300℃ and 24 h, and the calorific value is 32.33 MJ/kg. The ReMo@ZNB catalyst exhibits superior recyclability and regeneration after cycle experiment. Structural characterization results reveal that the incorporation of ReMo can engender the transformation of lattice morphology, the strength of hydrogenation and acid adsorption. The possible mechanism is based on the synergism of adsorption coupling and hydrogenation over ReMo@ZNB catalyst. The synergic action initiates potential perspectives for improving lignin hydroconversion.
固载在沸石咪唑酯骨架上的非贵金属双金属纳米粒子、双功能 ReMo@ZNB 催化剂已被证明能促进 Kraft 木质素解聚。在这项研究中，不同热处理条件下的催化活性排序如下：ReMo@ZNB-700（空气）>ReMo@ZNB-500（空气）>ReMo@ZNB-700（N）。特别是具有 Re/Mo 原子比为 1/3 的双金属 ReMo 纳米催化剂表现出优异的性能。在 300℃和 24 小时的条件下，可得到乙酸乙酯可溶产物（92.18%）和石油醚提取生物燃料（78%）的优异收率，热值为 32.33 MJ/kg。ReMo@ZNB 催化剂在循环实验后表现出优异的可回收性和再生能力。结构表征结果表明，ReMo 的掺入可以引发晶格形态、加氢和酸吸附强度的转变。可能的机理基于 ReMo@ZNB 催化剂上的吸附偶联和加氢协同作用。协同作用为提高木质素加氢转化开辟了潜在的前景。
