Patent ID: 8771638

Claim:
A method for sequestering carbon dioxide from a top gas fuel, comprising: given a top gas divided into a process gas and a top gas fuel: mixing the process gas with a hydrocarbon and feeding a resulting reformer feed gas into a reformer for reforming the reformer feed gas and forming a reducing gas; and feeding at least a portion of the top gas fuel into a carbon dioxide scrubber for removing at least some carbon dioxide from the top gas fuel and forming a carbon dioxide lean gas that is selectively mixed with the reducing gas; wherein a volume ratio of the process gas to the top gas fuel is responsive to available heat in the reformer to which the reformer feed gas is fed; and wherein the volume ratio of the process gas to the top gas fuel is 1:1 when the carbon dioxide lean gas is fully utilized for mixing with the reducing gas and is 2:1 when the carbon dioxide lean gas is not utilized for mixing with the reducing gas.