Hydroconversion of 1-methylnaphthalene over Pt/AlSBA-15–Al2O3 composite catalysts

Promotional Effect of Pd Addition on the Catalytic Activity of Composite Pt-Pd/AlSBA-15–β Catalyst for Enhanced n-Heptane Hydroisomerization

“…It seems that chloride ions may play a significant role here. The time-of-flight secondary ion mass spectrometry presented in our earlier study [53] has revealed that the surface of Pt/AlSBA-15 catalysts is covered by chlorine species resulted from incomplete decomposition of H 2 PtCl 6 or HCl (HCl was incorporated during AlSBA-15 synthesis). The presence of chlorine ions over the surface of Pt catalysts as a result of impregnation with of H 2 PtCl 6 has been confirmed by other authors [54,55].…”

Bifunctional noble metal/zeolite catalysts for upgrading low-quality diesel fractions via selective opening of naphthenic rings

“…The most widely applied acidic OMM for preparing bifunctional SRO catalysts are Zr-and Al-doped mesoporous silicas. These materials were loaded with different noble metal compositions and evaluated for the ring opening of two-fused ring naphthenic 61,62 and aromatic [62][63][64][65][66][67][68][69][70][71][72] model compounds. When decalin was used as a model reactant, the maximum yields achieved with bifunctional noble metal/OMM catalysts were, however, notably lower than those attained on analogous zeolite-based catalysts even at higher reaction temperatures.…”

Upgrading of Light Cycle Oil to High-Octane Gasoline through Selective Hydrocracking over Non-Noble Metal Bifunctional Catalysts

“…Bifunctional catalysts with metal and acid sites are commonly used for selective hydrocracking of PAHs. The former site is mainly responsible for hydrogenation and dehydrogenation reactions, whereas the latter for isomerization, ring opening, and dealkylation reactions. , Catalysts based on noble metals such as Pd/HY, Pt/γ-Al 2 O 3 , and Pt/AlSBA-15–Al 2 O 3 have been assessed for the selective hydrocracking of PAHs. However, noble metal catalysts are subject to deactivation caused by sulfur and nitrogen poisoning; in addition, they are restricted because of the high cost and limited availability.…”

“…Almost all the catalysts mentioned above have been tested using model di- and triaromatic compounds, for example, tetralin, ,,, naphthalene, ,, methylnaphthalenes, ,,,, a mixture of phenanthrene and 1-methylnaphthalene, and so forth. Nevertheless, considering the complex composition of real feedstocks and the possible effect of sulfur- and nitrogen-containing compounds on the activity and stability of catalysts, experiments with real feedstocks are indispensable .…”

“…These disadvantages have spurred interests in non-noble metal catalysts such as Ni 2 P/ β, 12,13 Co−Mo/β, 14,15 Ni−W/β, 16,17 Ni−W/Hβ−Al 2 O 3 , 5,18 Ni−Mo/Hβ−HZSM-5, 4 Ni−Sn/Hβ, 19 Mo 2 C/γ-Al 2 O 3 , 10 and W/β. 20 Almost all the catalysts mentioned above have been tested using model di-and triaromatic compounds, for example, tetralin, 4 , 9 , 1 4 , 1 9 naphthalene, 9 , 1 0 , 1 2 methylnaphthalenes, 10,11,16,17,20 a mixture of phenanthrene and 1-methylnaphthalene, 13 and so forth. Nevertheless, considering the complex composition of real feedstocks and the possible effect of sulfur-and nitrogen-containing compounds on the activity and stability of catalysts, experiments with real feedstocks are indispensable.…”