Effect of K Addition and Acidification of Zeolite Support on the Performance of Zr:Mo/Hzsm-5 Modified Catalyst in Methane Aromatization
The conversion of methane into higher hydrocarbons and aromatics on potassium doped modified zeolite Zr:Mo catalysts under non oxidizing conditions have been studied in a fixed bed catalytic reactor system at 450 0 C and at atmospheric pressure. The potassium addition reduces the formation of carbon during the catalytic reaction. This also results in the stability of the catalyst system and increased aromatics production. This is due to electronically modified active sites and increase in Bronsted acidity.
Pt Loaded HIGH-Ga Silicates for Aromatization of Light Paraffins and Methane
High Ga-contained pentasil type Ga-silicates having Si/Ga atomic ratios 20, 15, and 10 were synthesized by adopting the rapid crystallization method. The conversion rate of ethane was lower than that of propane, however since the selectivity to aromatics increased very much on the Pt/H-Ga-silicate, which involved Ga as Si/Ga ratio 15, the space-time yield of aromatics from ethane was rather higher than that from propane. Addition of O2 or H2 in the feed gas for ethane conversion retarded the reaction, indicating that the balance of dehydrogenation and hydrogenation activities is necessary to advance the aromatization. Although the conversion was very low, methane to aromatic conversion was observed on this catalyst.
Remarkable non-oxidative conversion of methane to naphthalene andbenzene on Co and Fe modified Mo/HZSM-5 catalysts
Remarkable production of naphthalene and benzene is found in the 
dehydrocondensation of methane under non-oxidative conditions on Co- and 
Fe-modified Mo/HZSM-5 catalysts at 973 K and 1 atm pressure of 
methane.