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 carbon materials and its energy catalytic conversion research. The relevant 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 to refine high-quality biofuels and fine chemicals is an important approach for their resource utilization. Controllable preparation of catalysts with low cost, high temperature stability, and high activity is the key and difficult point for the efficient conversion of biomass. The research group is dedicated to the preparation of environment-friendly biomass-based carbon functional materials and environmental applications. It has published research papers in Bioresource Technology, Chemical Engineering Journal, and Journal of Hazardous Materials. Recently, on the basis of previous work, the research team has innovatively 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 and environmentally friendly. The precise control of the morphology, size, and crystal form of the catalytically active center.
Catalytic studies show that the porous channel-core-shell structure of the hydrothermal carbon support acts as a molecular channel to enhance the contact between the reactant and the nano-active center; at the same time, the rich functional groups of the hydrothermal carbon shell enhance the interaction between the nano metal grain and the support. Therefore, the sintering and inactivation of the nano-metal high-temperature catalytic process can be effectively suppressed. The nanometal catalysts prepared by this method have very high reaction activity, and the removal efficiency of the hard-degradable components of the tar oil under mild conditions is as high as 95%. The related research results are published in Applied Catalysis B: Environmental; the new transfer mechanism based on hydrothermal carbon dielectrics Based on the findings, the research team further developed the in-situ “self-reducing†nano-grains coupled CO2 in-situ capture enhanced hydrogen conversion technology route for sludge in situ, and realized the “zero tar†gasification of municipal sludge and the orientation of hydrogen-rich gas. Synthesis, related research results were published in ACS Sustainable Chemistry & Engineering; Based on the single metal catalyst system, the research group prepared a series of nano-bimetallic catalysts and applied it to the catalytic gasification of waste biomass by further precise control. The catalysts exhibited very high catalytic activity and stability, and the results of this research were recently published in Green Chemistry. The above series of studies showed that carbon composite functional materials prepared based on the new mechanism of water-heat carbon dielectric conduction using waste biomass as raw material have many advantages such as simple preparation, low cost, high reactivity, and strong thermal stability, etc., in biomass energy. Catalytic conversion has important application value. The above studies have 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 "100-person Plan" project of the Chinese Academy of Sciences, the National Natural Science Foundation, and the Beijing Municipal Natural Science Foundation.
Comparison of hydrothermal carbon supported nanometal catalysts prepared by different technical routes
Synthesis Mechanism of Hydrothermal Carbon Supported Nano-Bimetallic Catalysts
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