OP-II-3

PP-III-66PRODUCTION OF HYDROGEN AND NANOFIBROUS CARBON BYSELECTIVE CATALYTIC PYROLYSIS OF LIGHT HYDROCARBONSON BIMETALLIC Ni-CONTAINING CATALYSTSSolovyev E. 1 , Ermakov D. 2 , Kuvshinov G. 11 Novosibirsk State Technical University, K. Marx Pr-t 20, Novosibirsk 630092, Russiae-mail: gennady.kuvshinov@gmail.com2 Boreskov Institute of Catalysis SB RAS, Lavrentiev Pr-t 5, Novosibirsk 630090,RussiaHydrogen is important chemical and perspective energy carrier for hydrogenenergetics. The main problem in successful development of hydrogen energetics isrelatively high cost of hydrogen produced by conventional steam reforming ofmethane (natural gas). This method is based on multi-step process including catalyticconversion of methane and water to synthesis gas (CO+H 2 ), water-gas shift reactionto convert CO into CO 2 and CO 2 removing. Complexity and necessity of hydrogenpurification determine high operating costs, especially for production of hydrogen forsmall proton exchange membrane fuel cell (PEMFC) power plants. Moreover evenvery small impurities of CO (>30 ppm) could damage PEMFC.Direct non-oxidative catalytic pyrolysis of hydrocarbons into hydrogen andnanofibrous carbon (NFC) is alternative one-step process to produce CO-freehydrogen. This process is effectively carried out by using Ni-based catalysts attemperatures 400–700°С with producing hydrogen and methane as the main gaseousproducts [1]. Due to thermodynamic there is quite low Н 2 :СН 4 ratio at given conditions.To produce H 2 –CH 4 mixtures with more than 50 vol.% of hydrogen the process ofhydrocarbon decomposition should be carried out at the temperatures above 700°C orbe accompanied by separation of methane from the reaction products that is quitecomplicated technical problem. Increase of process temperature result in increase ofenergy consumption and can cause rapid catalyst deactivation by carbons depositedon active catalytic sites. At the same time oxidative catalyst regeneration isunprofitable because of loss of a valuable NFC product.It is known that addition of second metal in Ni-containing catalyst can improve itsactivity and lifetime [2]. At that conversion of initial hydrocarbon is raised and as aresult hydrogen yield could be increased. Further more it has been ascertained thatuse of hydrocarbons heavier than CH 4 as a feedstock such as C 3 H 8 allows toincrease the selectivity of hydrogen and reduce the concentration of CH 4 in gaseous561