Three-way catalytic converters and devices for processing tail gases are disclosed. In some embodiments, a three-way catalytic converter includes a cylindrical housing, a three-way catalytic assembly provided in the cylindrical housing, a tail gas inlet and a tail gas outlet provided at the top of the cylindrical housing and communicated with the cylindrical housing, and a heater circumferentially wrapped around the outer side wall of the cylindrical housing. The three-way catalytic assembly is heated by energizing the heater. In other embodiments, a first cavity is formed between the three-way catalytic assembly and one end of the cylindrical housing, a second cavity is formed between the three-way catalytic assembly and another end of the cylindrical housing, the tail gas inlet is connected with the first cavity, and the tail gas outlet is connected with the second cavity.

A system for generating electricity with reduced or negative carbon emissions. The system includes a power plant section having an electricity generating unit having an input coupled to a hydrocarbon fuel supply and an energy exchange path. The system also includes a direct air capture (DAC) section having a CO.sub.2 adsorption device having a CO.sub.2 adsorbent material and a ventilator electrically coupled to the electricity generating unit, the ventilator directing air flow through the CO.sub.2 adsorption device in a carbon capture mode, wherein the CO.sub.2 adsorption device is coupled to and in energy communication with the energy exchange path for releasing adsorbed CO.sub.2 in a carbon release mode.

Three-way catalytic converters and devices for processing tail gases are disclosed. In some embodiments, a three-way catalytic converter includes a cylindrical housing, a three-way catalytic assembly provided in the cylindrical housing, a tail gas inlet and a tail gas outlet provided at the top of the cylindrical housing and communicated with the cylindrical housing, and a heater circumferentially wrapped around the outer side wall of the cylindrical housing. The three-way catalytic assembly is heated by energizing the heater. In other embodiments, a first cavity is formed between the three-way catalytic assembly and one end of the cylindrical housing, a second cavity is formed between the three-way catalytic assembly and another end of the cylindrical housing, the tail gas inlet is connected with the first cavity, and the tail gas outlet is connected with the second cavity.