Various secondary fuel gases, sometimes referred to as process off-gases, are generated during steel manufacturing. These gases possess calorific value that supports both the economic and environmental competitiveness of modern steel production. Coke Oven Gas (COG) is a by-product of the coking process in steel plants. It contains high levels of hydrogen along with significant amounts of dust and corrosive contaminants. These waste streams are captured and treated before combustion in gas turbines to reduce the quantities of H?S, tars, BTX, and dust. Beyond certain thresholds, contaminants must be removed to maintain gas turbine availability. Solar provides technical specifications regarding gas quality, which can offer guidance for contaminant removal. Over the years, Solar's experience has led to significant improvements in permissible contaminant levels, aligning with alternative technologies.