Analysis of Ammonia as an Impurity in Fuel Cell Grade Hydrogen According to ISO 14687 Grade D Using a Gas Generator

User Benefits

- The non-suppressor method provides good linearity of ammonium ions and reduces maintenance costs. - Since organic solvents are not used for extraction in pretreatment, environmental impact can be reduced. - Using a gas generator ensures the validity of the method including pretreatment.

Introduction

Hydrogen is expected to be a new power and heat source to reduce greenhouse gas emissions. Hydrogen is an easily available substance that can be produced from the electrolysis of water in our daily lives. However, when used in fuel cells, it is necessary to control impurities in hydrogen gas because certain impurities introduced during the manufacturing process deteriorate the electrode and electrolyte membrane, reducing the performance of the fuel cell or shortening its life. When ammonia is used as a carrier of hydrogen gas due to its distribution as a chemical, there is a possibility that ammonia may be introduced into hydrogen. This article presents an example of analysis of ammonia in hydrogen using an ion chromatograph (IC) based on the standard values described in ISO 14687 Grade D.

December 8, 2025 GMT