Akademik Veri Yönetim Sistemi
JOURNAL OF THE FACULTY OF ENGINEERING AND ARCHITECTURE OF GAZI UNIVERSITY, cilt.31, sa.3, ss.610-621, 2016 (SCI-Expanded)
Synthesis of 2,6-dimethylnaphthalene and reaction kinetics were investigated with disproportionation of 2-methylnaphthalene over HZSM5 and Zr/ZSM5 zeolite catalysts. The Zr/ZSM5 zeolite catalysts were prepared by wet impregnation method. The disproportionation experiments were carried in a differential gas-solid catalytic fixed bed reactor in the presence of 2 ml catalysts at two different temperature and five different weight hourly space velocity. 2-methylnaphthalene and benzene mixture which had a mole ratio of 1: 1 was used as a feed. The gas products, which exited from the reactor, were condensed in a cooler where ethylene glycol was circulated. The liquid products were identified by using GC-MS instrument. The results were shown that besides 2,6-dimethylnaphthalene, other dimethylnaphthalene and trimethylnaphthalene isomers were formed. Conversion of 2-methylnaphthalene was increased with increasing temperature and it was decreased with increasing weight hourly space velocity. The highest conversion of 2-methylnaphthalene was 30.4% over HZSM5 and 22.1% over Zr/ZSM5. Ratio of 2,6-dimethylnaphthalene/2,7-dimethylnaphthalene was above 1.0 for both zeolite catalysts. Although both selectivity of 2,6-dimethylnaphthalene and yield of 2,6-dimethylnaphthalene were decreased at lower temperature, they were increased at high temperature with Zr impregnated on ZSM5 structure. While the highest selectivity of 2,6-dimethylnaphthalene was reached 38.2% and the highest yield of 2,6-dimethylnaphthalene was reached 2.4 using HZSM5, the highest selectivity of 2,6-dimethyl naphthalene was reached 42.4% and the highest yield of 2,6-dimethyl naphthalene was reached 4.1 using Zr/ZSM5 catalyst. The disproportionation kinetic equation of 2-methylnaphthalene was found 2 order in the presence of HZSM5 and Zr/ZSM5 catalyst.