Researcher Liu Zhengang of the Research Center for Eco-environmental Sciences at the Chinese Academy of Sciences has made new progress in the preparation of waste biomass carbonaceous materials and its energy catalytic conversion. Related research results were recently published in Green Chemistry, Applied Catalysis B: Environmental (2017;204:566-576). ) and ACS Sustainable Chemistry & Engineering (2017;5:7613-7622).
The use of waste biomass for the refining of high-quality biofuels and fine chemicals is an important approach to its resource utilization. The low cost, high temperature stability, and controllable preparation of high-activity catalysts are the key and difficult points for the efficient conversion of biomass. The company is committed to the preparation of environment-friendly biomass-based carbon functional materials and its environmental applications. It has published research papers in Bioresource Technology, Chemical Engineering Journal, Journal of Hazardous Materials, etc. Recently, the research team has been innovative based on the previous work. Developed a 'one-step' synthesis route for the use of waste biomass-derived hydrothermal carbon as a catalyst carrier to support nanometals. The preparation conditions are mild, environmentally friendly and can be performed on the morphology, size and crystal form of the catalytically active center. Precise regulation.
Catalytic studies show that the porous channel-core-shell structure of the hydrothermal carbon support acts as a molecular channel to strengthen the contact between the reactants and the nanoactive centers; at the same time, the rich functional groups of the hydrothermal carbon shell enhance the interaction between the nanometal grains and the support. , In order to effectively inhibit the sintering and inactivation of the nano-metal high-temperature catalytic process. The nano-metal catalyst prepared by this method has a very high reactivity, and the removal efficiency of the hard-degradable component of the tar under mild conditions is as high as 95%. Related research results were published in Applied. Catalysis B: Environmental; Based on the discovery of a new mechanism for the transfer mechanism of hydrothermal carbon mediators, the research group has further developed the in-situ 'self-reducing' of the sludge nanocrystal coupled CO. 2In-situ capture of the enhanced hydrogen conversion technology route, achieved the targeted synthesis of zero tar gasification of municipal sludge and hydrogen-rich gas, and related research results were published in ACS Sustainable Chemistry & Engineering; based on the single metal catalyst system, The group prepared a series of nanometer bimetallic catalysts and applied it to the catalytic gasification of waste biomass through further precise control. The prepared catalysts showed very high catalytic activity and stability. The research results were recently published in Green Chemistry. The above series of studies have shown that carbon composite functional materials based on the new mechanism of water-heat carbon-mediated conduction of electrons using waste biomass as feedstock have many advantages such as simple preparation, low cost, high reactivity, and strong thermal stability. The catalytic conversion of matter and energy has important application value. The above research has deepened the understanding of the carbonization process of biomass, and provided important theoretical guidance for the application of waste biomass materials.
The above research has been supported by the Chinese Academy of Sciences' One Hundred Project, the National Natural Science Foundation, and the Beijing Natural Science Foundation.
Comparison of hydrothermal carbon supported nanometal catalysts prepared by different technical routes
Synthesis Mechanism of Hydrothermal Carbon Supported Nano-Bimetallic Catalysts
