Process for the production of hydrogen using a carbonated adsorbent with selected dubinin parameters

US6425939B1 · kind B1 · utility

Assignee

• L'Air Liquide, Société Anonyme à Directoire et Conseil de Surveillance pour l'Étude et l'Exploitation des Procédés Georges Claude · FR

Inventors

• Serge Moreau · Vélizy-Villacoublay, FR
• Bernd Polster · Frankfurt am Main, DE

Key dates

• Filing date: Oct 25, 2000
• Grant date: Jul 30, 2002
• Expiry date: Nov 9, 2020

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S95/901
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A process for the purification of a gaseous hydrogen flow containing one or more gaseous impurities from the group consisting of carbon monoxide, water vapor, nitrogen, H2S, chlorine, C1-C3 light alcohols, ammonia, carbon dioxide and linear, branched or cyclic hydrocarbons, saturated and unsaturated, C1-C8. The hydrogen flow is placed in contact with a porous carbonated adsorbent having an adsorption limit volume (W0) and an energy parameter of (E0) according to the Dubinin relationship, such that:0.18 ml.g−1≦W0≦1.50 ml.g−1and15 kJ.mole−1≦E0≦45 kJ.mole−1.The porous carbonated adsorbent is selected from active carbons. The gas rich in hydrogen is a reforming gas, an electrolysis gas, a gas from ammonia cracking or from alcohol cracking.