Buyers must prioritize the chemical composition based on the intended application. For anode-grade petcoke used in aluminum smelting, sulfur content must be below 3% and vanadium levels must be strictly controlled. For fuel-grade petcoke, the Calorific Value (typically >7,500 kcal/kg) and Hardgrove Grindability Index (HGI) are critical to ensure combustion efficiency in cement kilns or power plants. Additionally, monitor moisture content (ideally <8%) and volatile matter to prevent storage hazards and ensure processing stability.