Hydrogen Separation Reformer Using Pd-Alloy Membrane

Abstract

The hydrogen separation reformer using Pd-alloy membrane is a novel hydrogen production system for on-site hydrogen station for fueling fuel cell vehicles. In the hydrogen separation reformer, hydrogen is generated by steam methane reforming process using natural gas and the generated hydrogen permeates across the Pd-alloy membrane. Since hydrogen generation and separation proceed simultaneously in a single reactor without limitation of equilibrium, the hydrogen separation reformer is more compact and more energy efficient than a conventional reformer. Tokyo Gas Co., Ltd. and Mitsubishi Heavy Industries Ltd. have developed a 40 Nm³/h-H₂-class pilot system with energy efficiency of more than 80% and durability of more than 8000 hours. In addition, Tokyo Gas Co., Ltd. and NGK Spark Plug Co., Ltd. have developed a compact and low cost module with membrane on catalyst for the hydrogen separation reformer.