III International Conference

PP-II-130HYDROGEN PRODUCTION BY METHANE DECOMPOSITION ON NICKELCONTAINING CATALYSTS MODIFIED BY COPPER, IRON OR PALLADIUMStukachev V.I., Chukanov I.I., Glushenkov A.M., Kuvshinov G.G.Novosibirsk state technical university, Novosibirsk, RussiaE-mail: kuvshinov_g@mail.ruThe using of bimetallic Ni-Cu, Fe-Ni, Ni-Pd catalysts for hydrogen production by meansof methane decomposition in the temperature range of 600-850 o C was experimentallyanalyzed. The influence of catalyst’s mixture and process’ temperature on maximum yield ofhydrogen and nano-fibrous carbon during the period of complete deactivation of catalyst wasstudied. The conditions corresponding to maximum yield of hydrogen were determined. Itwas demonstrated that this index depends on peculiarities of stage’s going of process’starting. The maximum yield of hydrogen amounting to 285 g (855 g of carbon) per 1 g ofcatalyst was get using the 45%Ni-45%Pd-10%SiO 2 catalyst under the process’ temperature of800 o C and 50 hours of stable work.Hydrogen is known to be very prospective energy carrier with low effect on theenvironment. For example, as a fuel for H 2 -O 2 fuel cells. Today, all advanced countries of theworld work on the development of fuel cells. One of the main problem of industrialimplementation of fuel cells is a development of autonomous hydrogen sources, which arefree from carbon monoxide. At the present time industry gets hydrogen by steam reforming ofnatural gas, but during this process hydrogen becomes polluted by carbon monoxide, which ispoison for fuel cells. The necessary purification is a technically and commerciallycomplicated problem. As an alternative method the process based on methane catalyticdecomposition on carbon and hydrogen can be considered. In this process the formation ofcarbon monoxide is impossible at all, because of the absence of oxygen in the initial reactants.The analysis of thermodynamic limitations of the decomposition of methane processshows, that the high concentration of hydrogen in the gas mixture can be obtained only at thetemperature higher than 600 o C. Usually, nickel-based catalyst is used for methanedecomposition, but it can’t work stably for a long time at the high temperatures. That’s whythere is a necessity in searching for another catalyst systems for methane decompositionprocess, which have higher stability in work under high temperatures. The analysis ofliterature shows that one of the prospective directions in solving of this problem is connectedwith the development of bimetallic catalysts.The main part of this work was devoted to studying of bimetallic Ni-Cu, Fe-Ni, Ni-Pdsystems in the process of catalytic pyrolysis of methane under temperatures of 600-850 o C.401