Title of article :
A new approach of coke characterization on metal and support for Pt/Al2O3 by combination of Al2O3 and Pt/SiO2
Author/Authors :
Sunee Srihiranpullop، نويسنده , , Piyasan Praserthdam، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2004
Pages :
5
From page :
723
To page :
727
Abstract :
The main goal was to study the distribution and probability of chain growth of coke by the combination of Pt/SiO2 representing the metal sites with 100–120 mesh mixed with Al2O3 60–80 mesh representing the acid sites. TPO, ESR, IR and Soxhelt extraction analyzed with GC-14B were employed for coke characterization. From the effects of time, temperature, H2/HC ratio and modification of catalysts, it was found that probability of chain growth on both sites were the same. However, the greater accumulation was occurred on the support. This offered transformation on the gas phase of coke intermediates from the metal, which was primarily responsible for producing the coke precursors. The roles H2 and promoter was more sensitive to reduce coke and probability of chain coke, especially the effect of K promoter.
Keywords :
Coke , A physically mixed catalyst , Distribution and probability of chain growth of coke
Journal title :
CATALYSIS TODAY
Serial Year :
2004
Journal title :
CATALYSIS TODAY
Record number :
1232163
Link To Document :
بازگشت