Air and oxy-fuel combustion behaviour of petcoke/lignite blends

► Air and oxyfuel combustion of lignite, petcoke and their blend was investigated. ► Under oxy-fuel conditions combustion is delayed. ► In oxygen enriched conditions, DTG curves shift to lower temperatures. ► Effect of oxygen concentration is more significant than that of diluting gas. ► Synergy is observed between the parent fuels during combustion of blend.