Total oxidation of naphthalene using copper manganese oxide catalysts

Abstract

a b s t r a c tA series of copper manganese oxide catalysts have been investigated for the total oxidation of naphthalene, selected as a model compound for oxidation of polyaromatic hydrocarbons. Catalysts were prepared by coprecipitation and were calcined at 300, 400, 500 and 600 • C. The catalyst most active and selective towards CO 2 was calcined at 400 • C, and this was related to the formation of a high surface area poorly crystalline CuMn 2 O 4 phase. Catalysts calcined at 500 and 600 • C were less effective in oxidising naphthalene to CO 2 , and their composition of more highly crystalline CuMn 2 O 4 , with Mn 2 O 3 for the 600 • C catalyst, formed partial oxidation products. There was also a direct relationship between the extent of reduction from temperature programmed reduction and catalyst performance.

Recent Advances in the Catalytic Oxidation of Volatile Organic Compounds: A Review Based on Pollutant Sorts and Sources

“…Increased calcination temperatures reduced the activity of the catalysts, which was owing to the formation of a more crystalline CuMn2O4 phase. 572 Noble metal (Pd, Pt and Au) supported catalysts have also been investigated for the oxidation of naphthalene. [573][574][575] Garcia et al 576 reported that a Pd/TiO2 catalyst was more active than corresponding Pd/V/TiO2 and V/TiO2 catalysts.…”

Synthesis and Characterization of CoxOy–MnCO3 and CoxOy–Mn2O3 Catalysts: A Comparative Catalytic Assessment Towards the Aerial Oxidation of Various Kinds of Alcohols

“…Additionally, allylic alcohols such cinnamyl alcohol were also efficiently converted to cinnamaldehyde with 100% conversion as well as selectivity within 30 min (Entry 21). With respect to the typical secondary aromatic alcohols, complete conversion and selectivity towards corresponding ketones was accomplished (Entries [22][23][24][25][26][27].…”

“…In addition, it is well known that the catalytic efficiency of metal or metal oxide nanoparticle (NP)-based catalysts improves noticeably after doping these catalysts with other metals, which could be ascribed to huge specific surface area of metallic NPs [20]. Moreover, manganese-based catalysts have been broadly utilized for oxidation of moieties such as CO [21], naphthalene [22], toluene [23], cyclohexane [24], alkynes [25], alkyl aromatics [26], and aldehydes [27]. In particular, manganese oxides containing catalysts have also been widely used in catalytic alcohol oxidation to respective aldehydes or ketones [28].…”

Synthesis, Characterization, and Relative Study on the Catalytic Activity of Zinc Oxide Nanoparticles Doped MnCO3, –MnO2, and –Mn2O3 Nanocomposites for Aerial Oxidation of Alcohols

“…Moreover, it has several features, such as being highly active, stable, inexpensive, and ecofriendly catalyst [51][52][53][54][55][56]. However, different types of manganese oxide, mixed manganese oxide, and noble metal doped/supported Mn oxides were widely employed for the catalytic oxidation of numerous organic substrates, for instance, oxidation of naphthalene to carbon dioxide [57], oxidation of carbon monoxide to CO 2 [58,59], oxidation of toluene to CO 2 [60], oxidation of ethylene and propylene to CO 2 [61], oxidation of cyclohexane to cyclohexanol and cyclohexanone [62], oxidation of alkyl aromatics to ketones [63], oxidation of 4-tert-butyltoluene to 4-tert-butylbenzaldehyde [64], and oxidation of formaldehyde to CO 2 [65].…”