TOKYO GAS TOP > Corporate Information > Approach/Activity > Technical development > Low-carbon society > Creation of a new energy services business that utilizes a PEFC system

Creation of a new energy services business that utilizes a PEFC system

Facilities such as soda electrolysis plants, refineries, petrochemical plants and ammonia synthesis plants generate hydrogen as a by-product of their respective manufacturing processes. Tokyo Gas is engaged in research and development with the aim of realizing a by-product hydrogen PEFC system (pure hydrogen PEFC system equipped with impurity removal technology) and corresponding energy services geared toward various plants.
 

Object


Facilities such as soda electrolysis plants, refineries, petrochemical plants and ammonia synthesis plants generate hydrogen as a by-product of their respective manufacturing processes. The bulk of this by-product hydrogen is consumed on-site as a boiler fuel and chemical raw material, leaving scope for improvement in terms of energy efficiency. Accordingly, we aim to develop a by-product hydrogen PEFC system (pure hydrogen PEFC system equipped with impurity removal technology) that can convert by-product hydrogen to electricity with a high degree of efficiency, and realize energy services geared toward various plants that use this system.  
 
Conceptual diagram of by-product PEFC system
Conceptual diagram of by-product PEFC system


 

Research and development outline


Compared to other power generation technologies, polymer electrolyte fuel cells (PEFCs) theoretically offer the advantage of delivering the highest power generation efficiency when using hydrogen as fuel. However, the drawback of PEFCs is that they are vulnerable to impurities such as ammonia and sulfur.
Because by-product hydrogen includes various impurities resulting from manufacturing processes, measures to remove such impurities are required before the direct utilization as PEFC fuel. Accordingly, we have leveraged a proprietary approach to evaluate the impact of impurities based on in-plane current distribution measurement sensors, clarified the impact of various impurities included in by-product hydrogen as well as their related mechanisms, and are now developing impurities removal technology based on such mechanisms. We are examining energy services geared toward various plants using by-product hydrogen PEFC systems that are essentially pure hydrogen PEFCS systems equipped with impurity removal technology.   

 
In-plane current distribution measurement sensors Outcome of impurities impact evaluation
In-plane current distribution measurement sensors Outcome of impurities impact evaluation
*Source: S++ Simulation Services website
http://www.splusplus.com/measurement/en/csshunt.html
 

  

Perspective

 
We plan to conduct by-product hydrogen PEFC system trials and evaluations to help achieve a rapid realization of an energy services business geared toward various plants.
In addition, we aim to create new energy services that can support a hydrogen-powered society in the future by leveraging our insights and technology accumulated through this type of research and development.

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