Oxy-fuel combustion in coal-fired plants is a promising technology for capturing carbon emissions. A study used computer simulations to analyze how coal burns in a 200 MWe boiler under oxy-fuel and air combustion. They found that oxy-fuel combustion creates a stable temperature field with lower temperatures compared to air combustion. The burnout rate is better with oxy-fuel, but there is a risk of slagging in the primary combustion zone. Different flue gas recycling methods were also tested.