Pt/γ-A1₂O₃ 촉매를 예비황화시킨 촉매를 사용하여 n-heptane의 탈수소고리화반응을 고정층 연속흐름 반응기에서 행하였다. 조작조건의 범위는 온도 658-773K, 압력 1×10^5-30×10^5Pa, H₂/H.C. 몰비 3-7, 접촉시간 0.2-0.6g-cat. hr/g-feed이었다. 탈수소고리화반응은 온도가 증가하고 전체압력이 감소할수록 중가하였고, H₂/H.C. 몰비의 감소에 따라 증가하였다. 예비황화시킨 백금촉매는 백금촉매보다 탈수소고리화반응의 선택도를 증가시켰으며, 활성이 안정하게 오래 유지되었고, 촉매표면의 활성점이 고르게 분산되었다. n-Heptane의 탈수소고리화반응은 n-heptane의 분압에 관하여 외관상 1차반응이었고, 활성화에너지는 백금촉매와 예비황화시킨 백금촉매에 대해 각각 32.5 ㎉/mole, 50.4 ㎉/㏖이었다.

The dehydrocyclization of n-heptane was studied over 0.6 wt% Pt/γ-Al₂O₃ and presulfied 0.6wt Pt/γ-A1₂O₃ catalysts in a fixed bed continuous flow reactor. The ranges of experimental conditions were at temperatures between 658 and 773K, the pressures between 1×10^5 and 30×10^5Pa, the H₂/H.C. mole ratios between 3 and 7 and the contact times between 0.2 and 0.6g-cat.hr/g-feed. The dehydrocyclization increased with increasing temperatures, decreasing total pressure and decreasing H₂/H.C. mole ratios. The presulfied Pt catalyst showed increased selectivity and stability of dehydrocyclization and the surface of presulfied Pt catalyst was well dispersed rather than Pt catalyst. Both reactions of Pt and presulfied Pt catalyst were the first order with respect to n-heptane and their activation energies were 32.5 and 50.4 ㎉/mole, respectively.