Abstract
AbstractThis paper discusses the study of plant waste thermocatalytic conversion. The dependence of the conversion of agricultural waste on the pyrolysis temperature, reaction time and feedstock particle size was determined. The optimal temperature of fast pyrolysis providing the highest yield of gaseous products (over 30 wt. %) for all types of waste plant biomass was found to be 700 ºC. This temperature allows the lowest tar content in gases to be obtained. Further, ZSM-5 synthetic zeolites modified with iron subgroup metals were studied in the conversion of volatile products obtained by the fast pyrolysis of agricultural waste. It was found that the use of zeolite-based catalysts in the upgrading of gaseous products leads to a decrease in tar content and the increase in the volume concentration of С1-С4 hydrocarbons, CO, CO2, and hydrogen in comparison with the non-catalytic process.
Highlights
The conversion of agricultural waste is an important issue
In the current work, the influence of ZSM-5 synthetic zeolites modified with iron subgroup metals was studied in the conversion of volatile products obtained by the fast pyrolysis of agricultural waste of plant origin
Volatile pyrolysis products pass through a furnace for thermocatalytic cleaning (6) in which they interact with a heated catalyst
Summary
The conversion of agricultural waste is an important issue. Methods that can process plant biomass residues allows the share of renewable feedstock in the process of energy generation to be increased, as wellAccording to experts, the use of agricultural waste for energy is recognized by Denmark, Sweden, Spain, Germany, Poland, Canada, the USA, China, etc. In Russia, the collection and disposal of agricultural waste remain the main approach for its utilization. Another way that biomass is used in different countries is through to obtain thermal energy. The use of catalysts in the pyrolysis process is one of the promising ways to improve the quality of liquid and gaseous fractions. The first one is the direct introduction of the catalyst into the pyrolysis zone Such a technique has problems, e.g. fast catalyst deactivation due to the coke formation on the catalyst surface, problems with the catalyst recycling and regeneration, high impact of the catalyst in the product composition which leads to the impossibility of the process
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