Tokyo Gas Company Limited

Tatsuya Nakajima

Tatsuki Dohkoh

Marie Shirai

Kazuo Nakamura

Takahiro Ide

Toru Hatae

Shumpei Taku

Shunnosuke Akabane

Kazuki Isshiki

A fuel cell system including a fuel cell, an off-gas reprocessing unit that is provided downstream of the fuel cell and that at least partially removes at least one of steam or carbon dioxide from an off-gas discharged from the fuel cell, a flow passage that is provided downstream of the off-gas reprocessing unit and that allows a reprocessed off-gas discharged from the off-gas reprocessing unit to flow therethrough, and a controlling unit that modulates the reaction constant Kof a reaction A with respect to the reprocessed off-gas discharged from the off-gas reprocessing unit, to 1.22 or more.

Fuel cell system and method of reprocessing off-gas

A carbon dioxide production systemA includes: a fuel cell stack; a separation unitthat separates anode off-gas into a non-fuel gas including at least carbon dioxide and water and a regenerative fuel gas; a second heat exchangerthat separates water from the non-fuel gas; a water tank; and a carbon dioxide recovery tankthat recovers the carbon dioxide after the water has been separated.

Carbon dioxide production system

A fuel cell system that includes a first fuel cell that generates electric power using a hydrogen-containing fuel gas; a second fuel cell that generates electric power using off-gas exhausted from the first fuel cell and containing hydrogen that has not reacted in the first fuel cell; a first control device that controls the electric power output from the first fuel cell by adjusting a current or a voltage being output from the first fuel cell; a second control device that controls the electric power output from the second fuel cell by adjusting a current or a voltage being output from the second fuel cell; and an output control device that controls at least one of the first control device or the second control device such that a total electric power being generated by the first fuel cell and the second fuel cell approaches an electric power demand.

Fuel cell system and fuel cell control program

Growing community of inventors

Tokyo, Japan

Tatsuya Nakajima