الفهرس 
CH1: INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
hydrogen is an emerging alternative to conveentional fuels toreduce co*emissions.it is considered as a clean energy source and its market demand is steadily increasing.conventionally.steam reforming.partial oxidation and autothermal reforming of natural gas are the major routes for the production of hydrogen .in this thesis we used catalytic non-oxidative conversion reactions of natural gas to produce pure hydrogen.two famous commercially unsulifided hydrotreating catalysts assigned nickel or cobalt molybdate sypported on alumina were used as parent catalysts in thiswork.the catalytic ruins were carried out in horizontal fixed bed reactor under atmospheric pressure.the influence of reaction parmeters such as reaction temperature. feed dilution extent and reduction on the catalytic decomposition activity of natural gas were investigated over nicked molybdate catalyst.the resulting data showed that at 700 c and20130 dilution ratio of natural gas to nitroge. the5.2% ni-10% mo/a1o3 exhibited higher catalytic decomposition activity and stability toward h2 production up to7h time on stream.also incorporation of10 to 40wt% ni or co in the parent catalysts enhanced the decomposition activity and durability ahiger thermal stability.purity and graphitization degree of multiwalled carbon nanotubes (mwcnts) were obtained on all ni or co containing catalysts.