Preparation Of Pine Sawdust Based Carbon Catalysts And Their Application In Methane Conversion

The overexploitation of non-renewable fossil fuels has brought many challenges,including environmental issues and ecological damage.herefore,it is urgently to develop the environmentally-friendly,efficient and renewable alternative energy,such as biomass.Biomass can be used to produce fuel through both biologically and chemically methods.In addition,it can be also used to prepare carbon materials widely applied in the fields of adsorption,electrochemistry and catalysis by different methods.Based on the previous work of our research team,pine sawdust?PS?was selected as the biomass material in this study.An integrated process of biomass gasification and methane conversion was proposed based on our previouse work to produce fuel gas.Firstly,the work about steam gasification residue catalyzed methane conversion in our previous work was further developed and improved.Here cerium,magnesium,copper and sucrose were used as an additive in the steam gasification?SG?process of PS for preparing a carbon-nickel catalyst.he catalytic performance was investigated in methane dry reforming?MDR?and catalytic decomposition of methane?CMD?.he results showed that the additives can improve the catalytic performance of the catalyst,and especially better methane conversion was observed on the catalyst sample with addition of magnesium.For comparison,the traditional impregnated-pyrolysis-reduction?IPR?method was used to prepare Mg O-supported nickel catalysts with addition of cerium,copper and sucrose as an additive.he performance of these samples was also investigated in the methane conversion processes.It was found that the SG method showed an advantage of process intensification while the IPR method could provide some opportunities for synthesis of highly active and stable Ni catalysts with low nickel content?3.48 wt.%?.Secondly,a new route of syngas?CO and H₂?production was proposed and developed by integrating CO₂ partial gasification of PS and H₂ production by methane pyrolysis over the gasification residue.he CO yield and the structure and morphology of the gasification residue could be regulated by changing the gasification condition.Continuous and stable CO?an important chemical material?output and the uniformly distributed active Ni⁰?generated in situ?could be obtained during the gasification process.A high and stable methane conversion?about 91% at 850 ??was obtained during the methane pyrolysis process over the gasified residue.In addition,the co-production of carbon fibers and H₂ was also achieved.he integrated process could provide a potential strategy for the flexible and economical production of syngas and carbon fibers.