Torrefaction of Canadian Residential Solid Waste
Abstract
This work explores the effects of torrefaction on Canadian Residential Solid Waste (CRSW) as a pretreatment to enhance energy conversion from waste through thermochemical processes like pyrolysis and gasification. As waste generation increases globally, torrefaction presents an efficient method to improve energy density, reduce moisture content, and enhance calorific value. Studies on CRSW torrefied under different atmospheres (N₂, CO₂, and flue gas) reveal enhanced calorific values and significant energy densification, with CO₂ and flue gas serving as viable, cost-effective substitutes for nitrogen. Results also indicate that different waste fractions respond uniquely to torrefaction, with forest residues and wood wastes balancing high energy recovery and moderate densification, while lemon peels and paper cups show varied performance. This work highlights the need for optimized torrefaction temperature, waste stream selection, and torrefaction medium to maximize the energy potential of CRSW, offering sustainable waste management and energy solutions.