超临界水流化床多相催化颗粒制备

here is numerous biomass in China, which is usually for direct combustion leading to low energy efficiency and severe pollution. As a high-efficiency conversion method, biomass for catalytic hydrogen production in supercritical fluidized bed has been a hot research for several years. Supercritical water fluidized bed enhances the heat and mass transfer. Meanwhile, a proper catalyst is essential. This paper uses supercritical hydrothermal method to break limits of conventional catalyst synthesis method. Ni, Co, Zn and Cu metal elements are loaded on TiO2 particles which are proved to be steady in supercritical water. And nano particles are successfully made. Based on GC/MS, SEM, EDS and XRD analysis methods, it turns out that metal catalysts have a uniform spherical structure with diameter around 30 nm. Ni catalyst shows the best stability. Metal catalysts synthesized with supercritical hydrothermal method shows outstanding catalytic effects.