Crop residues in agriculture pose disposal challenges and contribute to air pollution when burned. This study aims to use pigeonpea stalks and maize biomass to produce biochar. Biochar can serve as a soil amendment for carbon sequestration and as an alternative fuel source. Pyrolysis were conducted at different temperatures (i.e., 400, 500, and 600°C) to examine the effects on physicochemical properties, fuel characteristics, and energy consumption. Higher temperatures resulted in decreased biochar yield, volatile matter, and O/C and H/C atomic ratios, while ash content and essential nutrients increased. The composition of the biomass significantly affected the yield, with PPS yielding more biochar than maize biomass at the same pyrolysis temperature. The biochar derived from both PPS and maize biomass met the essential quality criteria for carbon sequestration in soil, as established by the European Biochar Certificate (EBC) and the International Biochar Initiative (IBC). The biochar obtained through pyrolysis at 400°C demonstrated superior characteristics compared to biochar produced at other temperatures. It exhibited a higher biochar yield, with approximately 84.60% for pigeonpea and 64.85% for maize fixed carbon content. Additionally, the energy retention efficiency was higher, reaching 67.33% for pigeonpea and 42.70% for maize-derived biochar at a pyrolysis temperature of 400°C. The fixed carbon recovery efficiency was also notable at around 200.44% for PPS and 142.37% for maize biochar. Furthermore, the higher heating value (HHV) was approximately 30.75 MJ kg-1 for both, indicating their suitability as alternative solid fuels. A significant CO2 reduction potential of 84 CO2 eq kg−1 and 55 CO2 eq kg-1 was observed for pigeonpea and maize biochar, respectively. Hence, biochar is a promising and effective option for carbon sequestration, offering environmental benefits.