Design of a catalytic converter for co removal from hydrogen streams by oxygen-enhanced water gas shift reaction (OWGS)

  1. GAMBOA ROSALES, NADIA KARINA
Dirigée par:
  1. Jose Luis Ayastuy Arizti Directeur/trice
  2. Miguel Angel Gutiérrez Ortiz Directeur/trice

Université de défendre: Universidad del País Vasco - Euskal Herriko Unibertsitatea

Fecha de defensa: 13 juin 2014

Jury:
  1. Juan Ramón González Velasco President
  2. Rubén López Fonseca Secrétaire
  3. Mª Ujué Alzueta Anía Rapporteur
  4. Florence Epron Cognet Rapporteur
  5. Juan Ángel Botas Echevarría Rapporteur
Département:
  1. Ingeniería Química

Type: Thèses

Teseo: 117552 DIALNET

Résumé

Development of efficient catalysts for their use in purification of hydrogen from reforming processes (mainly WGS and CO-PROX) is a key factor to advance in hydrogen technology as a way to avoid the environmental problems arising from the massive use of fossil fuels, with special impact in transportation. In order to minimize the required reactor size, both WGS and CO-PROX stages can be carried out in a single stage, known as Oxygen-enhanced WGS (OWGS).In this PhD Thesis, monometallic and bimetallic catalysts containing gold, copper or cobalt, supported on ceria, have been prepared and studied. Au CuO/CeO2 has been found to be the optimal catalyst, besides being suitable to be deposited on monolithic substrates. It efficiently catalyzes the OWGS reaction, allowing the elimination of CO to levels ready for feeding the PEM fuel cell. In addition to removing CO, this catalyst produces hydrogen without the requirement of an exhaustive control of the fed oxygen.