Effects of alumina phases as nickel supports on deep reactive adsorption of (4,6-dimethyl) dibenzothiophene: Comparison between γ, δ, and θ-alumina

A Simple Way to Produce γ-Alumina From Aluminum Cans by Precipitation Reactions

“…It can be seen that the main phase found in the non-calcined samples was the boehmite (JCPDS 21-1307 card), which is transformed into γ-alumina (JCPDS 29-0063 card) after calcination. Similar profiles of γ-alumina were obtained by other authors 25,26 . Regarding LS1000-1 NC and LA1000-1 NC samples, besides boehmite phase NaCl (JCPDS 05-0628 card) and NH 4 Cl (JCPDS PDF 730365 card) were identified, respectively.…”

Effect of Calcination Temperature on the Structure and Catalytic Performance of the Ni/Al2O3 and Ni–Ce/Al2O3 Catalysts in Oxidative Dehydrogenation of Ethane

“…45−47 It could be mainly connected with the decrease of the acidity of alumina. 48 As observed from Table 1 The activity of Ni/Al 2 O 3 and Ni−Ce/Al 2 O 3 catalysts was studied in ODH of ethane at the constant amount of the catalyst (100 mg diluted with 2 cm 3 of SiC) and constant flow of the reaction mixture (40 cm 3 /min) which were used in these catalytic tests. The catalysts were studied at the reaction temperature range of 450−600°C with the exception of Ni/ Al 2 O 3 and Ni−Ce/Al 2 O 3 catalysts calcined at 500°C, which were studied up to the calcination temperature (i.e., from the reaction temperature of 400−500°C).…”

The role of H2S addition on Pt/Al2O3 catalyzed propane dehydrogenation: a mechanistic study

“…4,28 θ-Al2O3 was obtained by calcinating pseudo-boehmite (Aldrich) at 1000 o C for 6 h in static air with a heating rate of 3 o C/min. 29 Then, θ-Al2O3 was loaded with 0.5 wt% Pt using a solution of H2PtCl6 (Sinopharm). After the impregnation, the sample was aged at room temperature for 12 h, dried at 120 o C for 8 h, and calcined at 500 o C for 4 h with a heating rate of 2 o C/min.…”