Prime prove di un prototipo di pirolizzatore per la produzione di biochar

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Abstract

[automatically translated] Pyrolysis is a chemical decomposition of biomass process, carried out in the absence or limited presence of oxygen. During the complex pyrolysis of biomass polymeric molecules are split into simple molecules of gas (syngas), liquid substances and coal (char). The relative quantities of the three fractions depend on several factors such as, for example, the rate of heating, the final temperature, the gas in the reactor residence time, the type of pyrolysis reactor, the physical and chemical characteristics of the used biomass. Biochar obtained from agro-food industry by-products, from pruning residues from wood from the utilization of specialized crops and forest biomass, by the Organic Fraction of Municipal Solid Waste (MSW) adds value to these materials, and in some cases it solves the problem of their disposal as hazardous waste. Moreover, the product biochar by pyrolysis can be used as soil improver and, therefore, incorporated in the soil to improve its structural characteristics, water retention, the exchange capacity, etc., And at the same time constitute a storage tank of CO2 for a long period. In Sicily, where several areas are subject to desertification, the use of biochar could restore soil fertility, especially if mixed with compost which is currently produced from biowaste. In addition to the partial gasification of biomass it would be possible to produce electricity and heat. In the above perspective, the ultimate goal of this work is to design, build and develop a pyrolysis reactor capable of cogeneration in the farms. In fact it has been realized and tested a prototype of the pyrolysis reactor, mainly constituted by a rotary horizontal cylinder, actuated by an electric motor. It 'was a necessary time of about 18 minutes to reach temperatures above 100 ° C, in order to transform the water contained in biomass (consisting of shredded residues of trees belonging to the genus Ficus) in water vapor and other gases. During the pyrolysis process, performed up to a final temperature of about 400 ° C, was obtained in an average yield biochar equal to 38% of the biomass used. The search hereinafter provides for the development of the prototype of the pyrolysis reactor, using also other types of biomass,
Original languageItalian
Number of pages7
Publication statusPublished - 2011

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