Boreskov Institute of Catalysis of the Siberian Branch of Russian ...

OP-III-10REACTOR FOR CARBON NANOFIBERS SYNTHESYSPeshnev B.V., Nikolaev A.I., Asilova N.Y.M.V. Lomonosov Moscow State Academy of Fine Chemical Technology, Moscow, RussiaThe constructions of the reactors, proposed for the synthesis of carbon nanofibers bythermocatalytic decomposition of hydrocarbons or disproportionation of CO are discussed.The most typical deficiencies in their constructions are the narrow range of a change in thecharacteristics of the obtained product, the low degree of the conversion of raw material, thedifficulty for separation of product from catalyst and separation of solid and vapor phases, theincreased requirements for the utilized equipment. The original construction of reactor for thispurpose is proposed. This reactor makes possible to carry out the synthesis of carbonnanofibers, to divide solid and vapor phases, to separate the formed product from the catalystin one apparatus. The possibility of obtaining the product with different characteristics is themerit of the proposed reactor. The catalyst block, located along the axis of apparatus is thebasic element of reactor. The form of it is the inverted, truncated cone. The maximum contactof reagent is reached as a result of the filtration of the gas through the situated in the blockcatalyst. The process of the carbon nanofibers formes on the upper catalyst layers is mosteffective. The product is derived through radial clearance between the reactor vessel andcatalyst block. Separation of solid and vapor phases and separation of product from catalyst asa result occurs. It is possible to change the time of an increase in carbon nanofibers varyingdistance from the catalyst surface area to the upper edge of catalyst block. The result of thischanging is the possibility of obtaining the product with different concentration of mineralpart in nanofibers and specific adsorptive surface. The diameter of the fibers and theirgraphitization degree are determined by the temperature of process, by composition and flowof reaction gas, by nature of catalyst. The results of studies carried out at the department ofpetrochemical synthesis and synthetic liquid fuel of M.V. Lomonosov Moscow state academyof fine chemical technology are represented. They confirm the possibility of synthesis in thereactor of the proposed construction the product with different characteristics.109