Kusmiyati, Kusmiyati and Amin, N.A.S. and Siswanto, W.A. (2007) Highly Active W-H2SO4/HZSM-5 Catalyst for Direct Conversion of Methane into Aromatic. BULLETIN OF CHEMICAL REACTION ENGINEERING & CATALYSIS, 2 (2-3). pp. 32-36. ISSN 1978-2993
Official URL: http://bcrec.undip.ac.id/vol2/bcrec020203p32-36.pd...
Dehydroaromatization of methane (DHAM) under non oxidative condition was studied over tungsten loaded HZSM-5 catalysts to produce aromatic hydrocarbons. The catalysts were prepared by impregnation method using different conditions : in neutral and acidified solution. The activity of W/HZSM-5 prepared by neutral solution and W-H2SO4/HZSM-5 prepared in acidified condition were compared. The results showed that the optimum activity of W-H2SO4/HZSM-5 catalyst exceeded that of W/HZSM-5 catalyst. The effect of Si/Al ratio of W-H2SO4/HZSM-5 catalyst was also studied. The W-H2SO4/HZSM-5 catalyst with Si/Al ratio = 30 was found to be the most promising for the DHAM reaction. The remarkable activity of the catalyst is attributed to the presence of dual effects: suitable content of octahedral polymeric and tetrahedral monomeric tungstate species accompanied by proper amount and strength of acid sites in the catalyst.