Enhanced formaldehyde selectivity in catalytic methane oxidation by vanadia on Ti-doped SBA-15

Abstract

During catalytic methane oxidation V/Ti-SBA-15 showed an improved selectivity towards formaldehyde over all conversions compared to V/SBA-15.

Structure and Reactivity of sol–gel V/SiO2 Catalysts for the Direct Conversion of Methane to Formaldehyde

“…On the other hand, if the results obtained under high space velocity but with CH 4 :O 2 ratios of 2 and 9 are compared, it can be concluded that, both with and without NO addition, an increased formaldehyde space-time yield is achieved when the higher CH 4 :O 2 ratio is used, though at the expense of a decrease in conversion, which is in accordance with previous results found in the literature [31,32].…”

“…catalyst is ascribed to the larger proportion of V-O-Si species on the surface, which are associated with well-dispersed tetrahedrally coordinated monomeric or slightly oligomerized VO 4 species [31][32][33][34][35][36]. The yield of formaldehyde when using this catalyst is on the order of the most active catalysts based on V-silica found in the literature, e.g., the MCM-41-supported V catalyst [31], but with the advantage of being prepared by a one-pot, single-step and less-expensive sol-gel method.…”

Effect of synthesis pH on the structure and catalytic properties of FeMo catalysts

“…Formaldehyde is an important intermediate in the chemical industry. 1,2 The world production of formaldehyde from methanol uses a heterogeneous catalytic process based on silver 3 or FeMo catalysts. 4 The silver-catalyzed process is being replaced by the FeMo catalyzed process because of the high formaldehyde yield and longer lifetime of the catalyst, although the lifetime is still rather short ($1 year) due to deactivation, which is a major problem.…”

Combination of Chemo- and Biocatalysis: Conversion of Biomethane to Methanol and Formic Acid

“…At very low residence times the reaction can be controlled partially. During recent years, researchers focused their studies on methods to increase the productivity of this reaction [29][30][31] and found that a CH 2 O space-time yield above 5 kg CH 2 O •kg cat −1 •h −1 is possible by using an optimized mesoporous silica supported VO x catalyst [32,33]. Ohkubo and Hirose transformed methane directly to methanol and formic acid via chlorine dioxide radicals under photoirradiation [34].…”