TECHNOLOGICAL SOLUTIONS FOR UTILIZATION OF LIQUID PRODUCTS OF SLOW WOOD BIOMASS PYROLYSIS

Abstract

The relevance of the article is caused by the growing interest in biomass pyrolysis technologies to reduce the carbon footprint of its processing. To increase the economic and energy efficiency of these technological solutions, it is necessary to maximize the full use of all material and energy flows, one of which is the formation of liquid pyrolysis products (the so-called pyrolysis liquid or bio-oil). The main aim of the research is determination of technological solutions for the disposal of liquid pyrolysis products of woody biomass with the determination of the level of technical readiness. Methods: analytical literature review of literature data using materials from the RSCI, Scopus and Web of Science databases; the level of technical readiness was assessed according to the TRL scale. Results. The main methods of utilization of the pyrolysis liquid obtained as a result of slow pyrolysis of woody biomass were identified, classified and described. A review of technological solutions and research works in the field of disposal of liquid products of slow pyrolysis was made. The most common technologies for converting a pyrolysis liquid to obtain thermal and/or electrical energy were direct combustion in burners of boilers and heat generators, in the combustion chamber of gas turbine engines, gasification to produce synthesis gas, and the use in piston engines as fuel. Technologies for obtaining chemical products and substances were divided into simple (obtaining components for road construction, wood preservative, phenol-formaldehyde and saponified resins, etc.) and complex, requiring complex multistage processing. It was established that the energy application of this product has the highest level of technical readiness, while the chemical application technologies have the highest economic efficiency, despite the relatively low level of readiness. Commercial solutions for the disposal of pyrolysis fluid are available in the field of combustion in burners and diesel generators.

Keywords

• pyrolysis
• biomass
• burning
• combustion
• biooil
• pyrolysis liquid
• biochar