Poisoning effect of nitrogen compounds on dibenzothiophene hydrodesulfurization on sulfided NiMo/Al2O3 catalysts and relation to gas-phase basicity

M NAGAI

doi:10.1016/0021-9517(86)90036-9

Poisoning effect of nitrogen compounds on dibenzothiophene hydrodesulfurization on sulfided NiMo/Al2O3 catalysts and relation to gas-phase basicity

DOI Web Site Web Site 被引用文献7件

M NAGAI

書誌事項

公開日: 1986-01

権利情報

https://www.elsevier.com/tdm/userlicense/1.0/

DOI

10.1016/0021-9517(86)90036-9

公開者: Elsevier BV

この論文をさがす

CiNii Books

説明

Abstract The nature of hydrodesulfurization sites of sulfided NiMo Al 2 O 3 catalysts has been examined by selective poisoning studies using various nitrogen compounds. The reactions were carried out with a flow microreactor at 220–340 °C and 10.1 MPa total pressure. Major products were biphenyl and cyclohexylbenzene. The hydrogenation of biphenyl to cyclohexylbenzene rarely occurred at 260 °C in the presence of dibenzothiophene. Nitrogen compounds were effective poisons for dibenzothiophene hydrogenation but not for the desulfurization reaction at lower temperatures. The poisoning effect of nitrogen compounds was not correlated with their solution basicities but with their gasphase basicities. These results indicated that hydrogenation occurred on Bronsted sites that appeared on sulfided NiMo Al 2 O 3 Catalysts.