The Preparation Of The Honeycomb Cobalt-based Catalyst And The Research Of Its Fischer-Tropsch Synthesis Reaction Performance

China is a country with relatively shortage of timber resources in the world.The per capita forest area is far less than the world average,and the comprehensive utilization rate of timber resources is not high.The abandoned timber resources are not fully recovered and reused.Therefore,China is annually Abandoned timber resources are more.This paper considers the special honeycomb-like pore structure after carbonization of wood,and its use as a catalyst carrier not only contributes to the improvement of catalytic performance of the catalyst,but also facilitates the recycling of waste wood resources for sustainable development.An environment-friendly society provides the conditions.Fischer-Tropsch synthesis?FTS?is a fuel production process that converts synthesis gas produced from coal,natural gas or biomass into a sulfur-free,nitrogen-free and aromatic-free clean liquid hydrocarbon by catalytic synthesis.Alternative route.China's liquid fuel resources are relatively scarce,and Fischer-Tropsch synthesis is of great strategic significance for solving the problem of liquid fuel shortage and environmental pollution in China.Catalyst is one of the important factors affecting Fischer-Tropsch synthesis.Therefore,the synthesis of high-performance Fischer-Tropsch synthesis catalyst is an urgent problem to be solved in Fischer-Tropsch synthesis research,and has important research significance.Recently,a large number of new materials have been used as carriers for Fischer-Tropsch synthesis catalysts,and some novel structure catalysts have also been designed.These catalysts not only have excellent catalytic performance,but also enrich the researchers'understanding of the structure of the catalyst.The preparation of the catalyst for synthesis provides an idea.In this paper,a novel honeycomb cobalt-based catalyst was successfully designed and synthesized by X-ray diffraction?XRD?,scanning electron microscopy?SEM?,nitrogen physical adsorption-desorption?BET?and thermogravimetric analysis?TG?.Characterization.The Fischer-Tropsch synthesis reaction performance of the catalyst was tested in a fixed bed reactor.The research results are as follows:First,the Co-MOF-74 crystal was grown in situ in the waste wood channel by hydrothermal synthesis,and the honeycomb cobalt-based catalyst Co@C/CW was successfully prepared by carbonization.The effects of different hydrothermal temperatures,different Co-MOF-74 loadings,different calcination temperatures and different reaction conditions on the performance of Fischer-Tropsch synthesis reactions were investigated.The results show that the honeycomb cobalt-based catalyst exhibits higher CO conversion and C₅⁺hydrocarbon selectivity only when the hydrothermal temperature is 100°C,the Co-MOF-74loading is 15%,and the calcination temperature is 600°C.The reaction temperature was280°C,the reaction pressure was 2Mpa and the space velocity was 4L/h/gcat of the catalyst under the reaction conditions showed higher catalytic performance.Secondly,honeycomb Co/CW,Co@C/CW and Co@NC/CW were successfully prepared by carrier-supported cobalt metal element,Co-MOF-74 derived Co@C catalyst and ZIF-67derived Co@NC catalyst.The catalysts were characterized and their catalytic stability during the reaction was investigated.The results show that the honeycomb-estimated catalyst Co@C/CW exhibits high catalytic stability and activity.The conversion of CO decreases from68.6%to 49.7%during the 100h Fischer-Tropsch reaction,and the selectivity of C₅⁺hydrocarbons can reach 51.3%.Third,by comparing Co-MOF-74 derived Co@C catalyst,honeycomb cobalt-based catalyst Co@C/CW and Co@C/CW-P catalyst after grinding honeycomb catalyst in different Fischer-Tropsch synthesis reaction conditions The effect of the honeycomb support on the reactivity and stability of the catalyst was investigated under different catalytic properties.According to the analysis,since the honeycomb catalyst carrier has a regular and continuous pore structure,the reaction efficiency between the reaction gas and the metal cobalt is enhanced,the electron transfer between the CO molecule and the metal cobalt is promoted,thereby improving the reactivity of the catalyst and stability.