Catalytic Performance of the Sb–V Mixed Oxide on Sb–V–O/SiO2 Catalysts in Methane Selective Oxidation to Formaldehyde

Abstract

Sb-V-O/SiO 2 catalysts were prepared and investigated in methane selective oxidation with O 2 as oxidant. Sb-V-O/SiO 2 catalysts are active and selective in methane selective oxidation. The formaldehyde yield obtained on Sb-V-O/SiO 2 catalysts is clearly higher than that for VO X /SiO 2 and SbO X /SiO 2 catalysts. A one-pass formaldehyde yield up to 3% was obtained on Sb-V-O/SiO 2 catalysts at 650°C. XRD and UV Raman studies showed that the phase of Sb-V mixed oxide on Sb-V-O/SiO 2 catalysts transformed with decreasing Sb/V ratio from Sb 2 VO 5 to SbVO 4 /VSb 1-X O 4-1.5X phase. The Sb-V mixed oxide in Sb 2 VO 5 phase is more active and selective than that in SbVO 4 /VSb 1-X O 4-1.5X phase.

Gas-Phase Selective Oxidation of Methane into Methane Oxygenates

“…Few reports on the effect of the promoter in V-based catalysts on the partial oxidation of methane exist. The Sb-V-O/SiO 2 catalyst was reported to be better than single metal oxide catalysts, such as VO x /SiO 2 and SbO x /SiO 2 , in terms of formaldehyde yield [117]. Formaldehyde yields of up to 3% were achieved at 650 • C with the Sb-V-O/SiO 2 catalyst; moreover, the Sb/V ratio also influences the catalyst performance owing to the phase transformation of the Sb-V mixed oxide [117].…”

“…The Sb-V-O/SiO 2 catalyst was reported to be better than single metal oxide catalysts, such as VO x /SiO 2 and SbO x /SiO 2 , in terms of formaldehyde yield [117]. Formaldehyde yields of up to 3% were achieved at 650 • C with the Sb-V-O/SiO 2 catalyst; moreover, the Sb/V ratio also influences the catalyst performance owing to the phase transformation of the Sb-V mixed oxide [117]. Wallis et al [90] prepared V/Ti-SBA-15 catalysts and found that the Ti promoter contributed to the dispersion and reduction of the VO x species, thereby increasing the activity of the catalyst.…”

SbVO4 nanoparticles synthesized via three facile one-pot methods: controllable morphologies and superhydrophobic coatings

“…Physicochemical properties of inorganic colloidal nanocrystals exhibit high size-and shape-dependences within a scale of 1-10 nm due to quantum confinement effects [1][2][3][4]. A typical example stays within the family of antimony vanadium oxides, including variations of Sb0.92V0.92O4 [5], Sb2V2O9 [6], SbVO4 [7 -10], Sb(VO3)3 [11] and Sb2VO5 [12]. Different from the rutiletype bulk counterpart, its nanocomposite structures strongly depend on their preparatory conditions.…”

“…Different from the rutiletype bulk counterpart, its nanocomposite structures strongly depend on their preparatory conditions. These oxides were found as catalysts for selective oxidation and ammoxidation of methane to formaldehyde [12], and propane to acrylonitrile [13]. In addition, nanoscale antimony vanadium also has potential electrochemical properties in the field of lithium ion batteries [7].…”

Effect of Mg in Alumina-Supported Sb–V–O Catalysts for the Ammoxidation of Propane into Acrylonitrile

“…Methanol TPSR profiles show that these materials exhibit highly efficient redox character [14]. They show good performances for the selective oxidation of H 2 S to elemental sulfur [15,16]; for the oxidation of isobutene into methacrolein [17,18]; for the methane selective oxidation to formaldehyde [19]; for the dehydrogenation of alkylbenzenes with carbon dioxide [20][21][22] and for the total oxidation of nitrogen-containing organic volatile compounds [23]. They have also been studied for the propane selective oxidation to acrylic acid [24][25][26][27] and for the propane ammoxidation to acrylonitrile [28,29].…”