Study On Effect During Co-pyrolysis Of Corn Stalk And Cotton Stalk

Biomass energy is clean, carbon-free and renewable. Compared with other energy sources, biomass energy is characterized by a wide range of energy products. The mixing technology study of the biomass pyrolysis is relevant as it is the initial step of biomass combustion, pyrolysis, briquetting technology and other major routes of biomass utilization technology. Hence to conduct research on the laws of the biomass blends pyrolysis plays positive roles on the sustainability of the overall industry, which relieve our energy resource and environmental pressure. In this paper, the study was focused on thermal properties, reaction kinetics and characteristics of pyrolysis products of biomass straw blends using both a TG-DSC analysis and a tube furnace pyrolyser.The pyrolysis behaviors and pyrolysis kinetics of corn straw(YM),cotton stalk(MG) and blends at different proportion were studied by TG-DSC technique. The results indicate that two kinds of biomass straw can be mixed fully. The pyrolysis process with its blend ratio is not a linear relationship and solid product reduced compared with single-stalk. In addition, the major pyrolysis process of mixture within the main range can be well described by a two-dimensional diffusion model with Malek method. Among the tested samples, the40:60MG/YM blend shows the lowest activation energy of51.7KJ/mol. Besides corn straw plays a dominant role on the course of the thermal conversion.The response surface methodology(RSM) was employed for the evaluation model of straw blends pyrolysis. Solid product yield and fixed carbon content was chosen as output indictors. The results showed influence degree of each factors on the solid product yield was pyrolysis temperature, heating rate, blend ratio, holding time.Compared that the influence degree on the fixed carbon content was blend ratio, pyrolysis temperature, holding time, heating rate respectively. Pyrolysis process and pyrolysis products can be well described by the fitting equation. Improvement of the process conditions may play an important role on the product yield and the product distribution. The experimental results may provide useful data to promote the application of biomass thermochemical conversion technology of biomass mixture.