TY - JOUR
AU - Tanatarov, M.
AB - THE DIFFUSION FACTOR IN COKE FORMATION ON AN ALUMINOSILICATE CATALYST (UDC 542.973 : 66.092.88) M. E. Levinter, G. M. Panchenkov, and M A. Tanatarov In most heterogeneous catalytic reactions using hydrocarbons as raw material, coke is deposited on the catalyst surface. This coke may reduce the catalyst activity, both by poisoning the active centers and by altering the macro- structure (surface area, specific volume and mean pore radius). Using exchange reactions with NaC1, we have found a relation between the amount of coke deposited and the number of active centers put out of action. However, this method does not yield information on the distribution of the coked-up centers with depth in the catalyst granule. The literature contains contradictory data on the distribu- tion of coke within the catalyst spherules. Some authors, using microsections [1] or comparing the loss of weight of the coke with the zone lightened by regeneration of the catalyst [2], showed that most of the coke is deposited on the peripheral parts of the fresh catalyst grains. These data agree with Voorhies' hypothesis [3] on the diffusion na- ture of the coke-formation process. Other authors [4] dispute these results even for the case of a pelletized 
TI - The diffusion factor in coke formation on an aluminosilicate catalyst
JF - Chemistry and Technology of Fuels and Oils
DO - 10.1007/BF00729189
DA - 2004-11-18
UR - https://www.deepdyve.com/lp/springer-journals/the-diffusion-factor-in-coke-formation-on-an-aluminosilicate-catalyst-6H021Bzv1r
SP - 154
EP - 158
VL - 2
IS - 3
DP - DeepDyve
ER -