Evaluation of Physical and Chemical Properties of Residue from Gasification of Biomass Wastes

Abstract

Thermochemical conversion of biomass waste is a high potential option for increasing usage of renewable energy sources and transferring wastes into the circular economy. This work focuses on the evaluation of the energetic and adsorption properties of solid residue (char) of the gasification process. Gasification experiments of biomass wastes (wheat straw, hay and pine sawdust) were carried out in a vertical fixed bed reactor, under a CO2 atmosphere and at various temperatures (800, 900 and 1000 °C). The analysis of the energy properties of the obtained chars included elemental and thermogravimetric (TGA) analysis. TGA results indicated that the chars have properties similar to those of coal; subjected data were used to calculate key combustion parameters. As part of the analysis of adsorption properties, BET, SEM, FTIR and dynamic methanol vapor sorption tests were conducted. The specific surface area has risen from 0.42–1.91 m2/g (biomass) to 419–891 m2/g (char). FTIR spectroscopy confirmed the influence of gasification on the decomposition of characteristic chemical compounds for biomass. Methanol sorption has revealed for the 900 °C chars of pine sawdust the highest sorption capacity and its mass change was 24.15% at P/P0 = 90%. Selected chars might be an appropriate material for volatile organic compounds sorption.

Optimization of Gasifying Agents in 3D Downdraft Gasification for Enhanced Gas Composition, Combustion, and CO2 Utilization

“…Syngas can also be used as a building block for chemical synthesis [16][17][18]. Furthermore, residues could be used as biochar [19,20] or further upgraded for use as sorbents [21][22][23]. The majority of countries, with the exception of those dominating in hydropower, are observing an increased trend in the use of bioenergy derived from biomass, which constitutes more than half of the energy supply [24].…”

Advancing Sustainable Decomposition of Biomass Tar Model Compound: Machine Learning, Kinetic Modeling, and Experimental Investigation in a Non-Thermal Plasma Dielectric Barrier Discharge Reactor

“…Biomass processing is a dual approach for handling biowaste [1,2] and energy production simultaneously [3,4]. It is a predominant resource in thermochemical processes, i.e., gasification and pyrolysis, to simultaneously produce heat and clean energy [5][6][7][8]. Typically, producer gas consists of H 2 , CO, CO 2 , CH 4 , as well as other hydrocarbons, and N 2 if air is used as a gasifying agent [9][10][11][12].…”

Role of Experimental, Modeling, and Simulation Studies of Plasma in Sustainable Green Energy

“…Moreover, such gas can be used as a substrate for chemical syntheses (thus the name syngas), including producing liquid fuels in the Fischer-Tropsch process [17]. Solid residues from gasification can be considered as biochar [18,19], and apart from applying to the soil, such porous carbon material [20] can also be used as a sorbent [21,22]. Furthermore, gasification using CO 2 is an interesting way of using captured CO 2 for energy purposes [23].…”