Patent ID: 9221685
Filing Date: 2015-12-29
Classification: B01D,B01J,B82Y,C01B,Y02P

Abstract:
1. A method of capturing and sequestering carbon from a carbon-oxide-containing gas stream, comprising: passing a reaction gas stream comprising at least one carbon oxide and at least one reducing agent through a first catalytic converter in the presence of a catalyst to convert at least a portion of the at least one carbon oxide and at least a portion of the at least one reducing agent to solid carbon and an intermediate gas stream comprising water vapor; removing the first solid carbon product from the first catalytic converter; removing water from the intermediate gas stream to form a dried intermediate gas stream; passing the dried intermediate gas stream through a second catalytic converter to form a second solid carbon product and a tail gas stream; removing the second solid carbon product from the second catalytic converter; and recycling at least a portion of the tail gas stream to the first catalytic converter, the recycling comprising: passing the tail gas stream to a carbon oxide concentrator without removing water from the tail gas stream; removing at least a portion of the water and at least a portion of a gas other than a carbon oxide from the tail gas stream in the carbon oxide concentrator to form a dry recycle gas stream; and mixing at least a portion of the dry recycle gas stream with the reaction gas stream.