Role of phosphorus and tri‐ethylene glycol incorporation on the activity of model alumina‐supported CoMoS hydrotreating catalysts.

Environmental regulations concerning fuel-related sulfur emissions are currently experiencing worldwide expansion. This is motivating the research and development of improved hydrotreating (HDT) catalysts with carefully engineered synthesis methods that maximize activity as ultimate goal. In this contribution, effect phosphorus doping triethylene glycol (TEG) incorporation on genesis CoMoS phase model HDT assessed. Following a surface-science approach, α-Al2O3 single crystals four orientations: C(0001), A(11 0), M(10 R(1 02) used supports traditional γ-Al2O3 support for study active phase-support interactions at molecular scale. The prepared by impregnation solution containing metal precursors TEG. characterized in sulfide XPS, XAS, TEM, AFM, revealing calcination step key emergence distinctive metal-support interactions, which directly related to nature alumina surface sorption sites. addition, TEG dried increases sulfidation enhances promotion respect non-additivated systems, especially mild temperatures. catalytic tested thiophene hydrodesulfurization reaction, following trend A ≫ M >R , C(0001). identical one observed non-phosphorus doped non-TEG additivated confirming predominance effects over those exerted P By transposing these results industrial support, (100) facet would provide sites lead better performing catalysts. could result novel supports, expose activity.