Titre du document / Document title
Study on the suitability of New Zealand coals for hydrogen production
Auteur(s) / Author(s)
CLEMENS Tony (1) ;
GONG Desmond (1) ;
PEARCE Steven (2) ;
Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)
(1) CRL Energy Ltd., P O Box 31-244, Lower Hutt, NOUVELLE-ZELANDE
(2) Solid Energy New Zealand Ltd., P O Box 1303, Christchurch, NOUVELLE-ZELANDE
Résumé / Abstract
Internationally there is considerable interest in utilizing hydrogen as an energy carrier. The use of hydrogen offers considerable potential benefits such as reducing greenhouse emissions, reducing urban pollution, increased energy security and increased efficiencies from the use of advanced energy conversion technologies. One of the most important questions when considering the development of a hydrogen economy is "where will the hydrogen come from?" Possible answers include electrolysis of water, steam reforming of methane and the gasification of coal. Given the high costs associated with electrolysis of water, and the increase in the cost of methane predicted over time, the gasification of coal is viewed by many as being the cheapest method of hydrogen production in the foreseeable future. These considerations are particularly relevant to New Zealand where gas supplies are dwindling but where there is sufficient coal to last for many centuries at present utilization rates. This, along with the current high international interest in hydrogen energy, has been recognized by the New Zealand Government in the form of a six-year [2002-2008] research project "Hydrogen Energy for the Future of New Zealand". One important coal property that, in particular, determines the suitability of a particular coal for use in a fluidised bed gasifier is its reactivity towards the gasification reaction. It was found that a high percentage of New Zealand's coal resource is particularly well-suited towards fluidised bed gasification, reacting at anywhere between 0.9 to 1.75 times the rate of Australian brown coals. It was found the New Zealand lignites contained significant levels of organically bound calcium, which was shown to be responsible for not only the high reactivity of the New Zealand lignites, but also a product gas composition with higher than expected hydrogen concentrations. These findings are discussed along with their implications for the gasifier and gas clean-up design.
Revue / Journal Title
International journal of coal geology
ISSN
0166-5162
CODEN IJCGDE
Source / Source
2006, vol. 65, n
o 3-4 (84 p.) [Document : 8 p.] (18 ref.), pp. 235-242 [8 page(s) (article)]
Langue / Language
Anglais
Editeur / Publisher
Elsevier, Oxford, ROYAUME-UNI
(1980)
(Revue)
Mots-clés anglais / English Keywords
Australasia ;
sedimentary rocks ;
carbonaceous rocks ;
New Zealand ;
experimental studies ;
economic data ;
concentration ;
calcium ;
lignite ;
resources ;
projects ;
cost ;
gasification ;
methane ;
electrolysis ;
technology ;
efficiency ;
pollution ;
energy ;
hydrogen ;
coal ;
Mots-clés français / French Keywords
Australasie ;
Roche sédimentaire ;
Roche carbonée ;
Nouvelle Zélande ;
Etude expérimentale ;
Donnée économique ;
Concentration ;
Calcium ;
Lignite ;
Ressource ;
Projet ;
Coût ;
Gazéification ;
Méthane ;
Electrolyse ;
Technologie ;
Efficacité ;
Pollution ;
Energie ;
Hydrogène ;
Charbon ;
Mots-clés espagnols / Spanish Keywords
Australasia ;
Roca sedimentaria ;
Roca carbonosa ;
Nueva Zelandia ;
Dato económico ;
Concentración ;
Calcio ;
Lignito ;
Proyecto ;
Costo ;
Gasificación ;
Metano ;
Electrólisis ;
Tecnología ;
Polución ;
Energía ;
Hidrógeno ;
Carbón ;
Mots-clés d'auteur / Author Keywords
Coal ;
Gasification ;
Hydrogen ;
Lignite ;
Reactivity ;
Calcium ;
Localisation / Location
INIST-CNRS, Cote INIST : 18273, 35400013314191.0050
Nº notice refdoc (ud4) : 17546431
