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황화 C0-Mo/Υ-Al2O3 촉매에 의한 Dibenzothiophene의 수첨탈황반응에 관한 연구
Hydrodesulfurization of Dibenzothiophene Catalyzed by Sulfided Co-Mo/Υ-Al2O3 Catalysts
HWAHAK KONGHAK, June 1989, 27(3), 315-322(8), NONE
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Abstract
Cobalt의 함량을 변화시켜 가며 γ-alumina에 담지된 Co-Mo 촉매를 황처리하여 dibenzothiophene(DBT)의 수첨탈황반응을 고정층 흐름 반응기에서 행하였다. DBT는 n-heptane에 용해시켰다.
조작조건의 범위는 온도 533K, 553K, 573K에서 압력을 20×105Pa에서 60×105Pa까지 변화시켰다. 이 범위안에서 생성물의 대부분은 biphenyl과 cyclohexylbenzene이고, bicyclohexyl과 tetra-hydrodibenzothiophene은 미량 검출되었다.
533K, 40×105Pa, W/F=1,457g catalyst hr/gmol DBT하의 조작조건하에서 촉매 활성은 Co/(Co+Mo)=0.2-0.3에서 가장 좋았다.
반응치수는 DBT의 농도에 대해 1차였고 활성화에너지는 23.4kcal/gmol이었으며 반응경로는 직렬반응(sequential reaction)이었다.
조작조건의 범위는 온도 533K, 553K, 573K에서 압력을 20×105Pa에서 60×105Pa까지 변화시켰다. 이 범위안에서 생성물의 대부분은 biphenyl과 cyclohexylbenzene이고, bicyclohexyl과 tetra-hydrodibenzothiophene은 미량 검출되었다.
533K, 40×105Pa, W/F=1,457g catalyst hr/gmol DBT하의 조작조건하에서 촉매 활성은 Co/(Co+Mo)=0.2-0.3에서 가장 좋았다.
반응치수는 DBT의 농도에 대해 1차였고 활성화에너지는 23.4kcal/gmol이었으며 반응경로는 직렬반응(sequential reaction)이었다.
A series of supported sulfided Co-Mo/Υ-Al2O3 catalysts of different cobalt contents were tested in a fixed bed flow reactor for the hydrodesulfurization of dibenzothiophene(DBT)dissolved in n-heptane. Reaction temperatures were between 533K and 537K, and total reaction pressures were from 20 to 60×105Pa. Most of the products observed were biphenyl and cyclohexylbenzene, and only negligible amount of bicyclohexyl and tetrahydrodibenzothiophene were detected. The catalytic activities with different cobalt contents were shown to be maximum in the range of R=Co/(Co+Mo)=0.2-0.3 under standard condition. The reaction was first order with respect to DBT concentration, and the average activation energy was 23.4kcal/gmole.
