The increased consciousness in greenhouse emissions has encouraged the expansion of new technologies to accommodate the internment and appropriation of carbon dioxide. Demineralisation handling by leaching consuming different reagents, including hydrochloric acid, nitric acid, as well as sodium hydroxide, were considered intended for ash reduction and their effects on the physical, chemical, and thermal behaviour of wheat straw. Dilute-acid reagents reduced the maximum ash content in biomass as 92.94 % in the case of 0.6 mol of HCl, followed by 0.4 mol of HNO3 having 90.75 % ash reduction. While in the case of basic reagent, 0.2 mol of NaOH reduced 85.73 % ash having lower value than the acidic reagents. The acidic leached samples show higher heating value than the basic one as the calorific value is increased by more than 4.15 % and decreased by 3.95 %. It is because the basic reagents rescind the assembly of the hydrocarbon, as portrayed through SEM and FTIR spectra.