A thorium-doped catalyst for the high temperature shift reaction

The reforming of natural gas feedstock in the presence of steam is the main industrial route to produce high purity hydrogen. However, this process also produces carbon oxides which can poison most hydrogenation catalysts as well as ammonia catalysts. In industrial processes, these compounds are oft...

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Detalles Bibliográficos
Autores principales: Rangel Costa, João Luı́s, Marchetti, Sergio Gustavo, Carmo Rangel, Maria do
Formato: Articulo
Lenguaje:Inglés
Publicado: 2002
Materias:
Química
Shift reaction
Thorium-doped magnetite
Hydrogen production
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/142008
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-142008
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Química
Shift reaction
Thorium-doped magnetite
Hydrogen production
spellingShingle Química
Shift reaction
Thorium-doped magnetite
Hydrogen production
Rangel Costa, João Luı́s
Marchetti, Sergio Gustavo
Carmo Rangel, Maria do
A thorium-doped catalyst for the high temperature shift reaction
topic_facet Química
Shift reaction
Thorium-doped magnetite
Hydrogen production
description The reforming of natural gas feedstock in the presence of steam is the main industrial route to produce high purity hydrogen. However, this process also produces carbon oxides which can poison most hydrogenation catalysts as well as ammonia catalysts. In industrial processes, these compounds are often removed from the gaseous stream by the water gas shift reaction (WGSR), which is performed in two steps due to thermodynamics and kinetics considerations. A chromium and copper-doped hematite has been recently proposed as an industrial catalyst in the high temperature shift (HTS). This solid shows a stable performance but the search for non-toxic systems is much needed due to environmental restrictions related to chromium compounds. In this work, the use of thorium instead of chromium in iron- and copper-based catalysts for the HTS reaction was investigated. Catalysts were prepared in the active form (magnetite) in order to save energy, characterized by several techniques and then evaluated in operational conditions close to the industrial ones. It was found that thorium can replace chromium in these catalysts leading to better catalytic properties as compared to chromium. The catalyst has the advantage of being less toxic and can be prepared in the active phase.
format Articulo
Articulo
author Rangel Costa, João Luı́s
Marchetti, Sergio Gustavo
Carmo Rangel, Maria do
author_facet Rangel Costa, João Luı́s
Marchetti, Sergio Gustavo
Carmo Rangel, Maria do
author_sort Rangel Costa, João Luı́s
title A thorium-doped catalyst for the high temperature shift reaction
title_short A thorium-doped catalyst for the high temperature shift reaction
title_full A thorium-doped catalyst for the high temperature shift reaction
title_fullStr A thorium-doped catalyst for the high temperature shift reaction
title_full_unstemmed A thorium-doped catalyst for the high temperature shift reaction
title_sort thorium-doped catalyst for the high temperature shift reaction
publishDate 2002
url http://sedici.unlp.edu.ar/handle/10915/142008
work_keys_str_mv AT rangelcostajoaoluıs athoriumdopedcatalystforthehightemperatureshiftreaction
AT marchettisergiogustavo athoriumdopedcatalystforthehightemperatureshiftreaction
AT carmorangelmariado athoriumdopedcatalystforthehightemperatureshiftreaction
AT rangelcostajoaoluıs thoriumdopedcatalystforthehightemperatureshiftreaction
AT marchettisergiogustavo thoriumdopedcatalystforthehightemperatureshiftreaction
AT carmorangelmariado thoriumdopedcatalystforthehightemperatureshiftreaction
bdutipo_str Repositorios
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