Blends of coal with potential fuels, such as bagasse, may help reduce greenhouse gas (GHG) emissions. This study investigates the combined effect of Thar lignite coal and sugarcane bagasse on their suitability for gasification or combustion. Extensive experimental investigations were conducted to assess the suitability of these blends as potential fuels. The Gross Calorific Value of Thar coal blended with sugarcane bagasse was found to be ∼8,610 Btu/lb, 8,387 Btu/lb, 7,968 Btu/lb, and 7,448 Btu/lb after being mixed in ratios of 100%, 75%, 50%, and 25% with coal, respectively. Thermogravimetric analysis revealed weight loss with increasing temperature in Thar coal; the data obtained will help in setting parameters for fluidized bed conditions. The activation energy and frequency factor were determined to be 68.11 kJ/mol and 636.60 min −1 , respectively. Gamma spectrometry was also performed on these samples, revealing the presence of four main natural radioactive elements: 127.4 ± 45.2 Bq/kg for 40 K, 2.1 ± 0.3 Bq/kg for 235 U, 71.2 ± 12.1 Bq/kg for 238 U, and 20.7 ± 3.1 Bq/kg for 40 K, 235 U, 238 U, and 232 Th. The radiometric measurements of Thar coal show lower emissions compared with the global average values of activity concentration in coal samples. The composition of a 50% bagasse and Thar coal blend results in a notable reduction in sulfur and ash content; however, there is some compromise in the heating value (from 8,610 to 7,969 Btu/lb). The findings of the present study will significantly impact sustainable energy and environmental protection by demonstrating that blending sugarcane bagasse with Thar lignite coal can effectively reduce GHG emissions, thereby contributing to cleaner energy production. These results encourage policymakers and industry stakeholders to adopt biomass-coal blending for sustainable development and environmental benefits. Future research should focus on developing advanced gasification and combustion technologies, along with comprehensive emission control measures, to further reduce GHGs and enhance energy efficiency.
Saleem et al. (2026) studied this question.