Catalytic Properties of Cu/13X Zeolite Based Catalyst in Catalytic Wet Peroxide Oxidation of Phenol

Abstract

Copper bearing 13X zeolite was prepared from commercial 13X zeolite via ion-exchange with copper acetate solutions. After the incorporation of copper, Cu/13X catalyst was exposed to post synthesis thermal treatment at different temperatures. The prepared catalysts were characterized by XRD and FTIR, while the adsorption techniques were used for the measurement of the specific surface area and pore volume. The catalytic tests were carried out in a stainless steel Parr reactor in batch operation mode at atmospheric pressure in temperature range from 333 to 353 K. Influence of postsynthesis thermal treatment and reaction temperature on activity and stability of prepared catalysts in the catalytic wet oxidation process with hydrogen peroxide as oxidant was investigated. The experimental results showed that total degradation of phenol can be achieved under mild operating conditions at temperatures bellow 353 K. All catalysts exhibited higher activity in terms of hydrogen peroxide and phenol abatement with the increasing temperature of the reaction. The postsynthesis thermal treatment resulted in more stable catalyst with respect to stability of both catalysts’ active metal component (copper) and support, while the activity of catalysts in terms of TOC conversion remained unaltered.

Enhanced Fenton-like degradation of pharmaceuticals over framework copper species in copper-doped mesoporous silica microspheres

“…Due to the mobilization of Cu(II)/Cu(I) in water, copper has been suggested to be supported on a porous solid substrate. Cu/13X [17], Cu/ SBA-15 [18], and Cu-containing MFI [19] zeolites have been reported as catalysts for wet peroxide oxidation of different organic pollutants. But up to now, the correlation between the copper state in the structure of the catalysts and their catalytic activity was still unclear.…”

Enhanced heterogeneous wet hydrogen peroxide catalytic oxidation performance of fly ash-derived zeolite by CuO incorporation

“…Increase in decolorization with increase in catalyst dosage is observed. This could be understood by the presence of more active sites for generation of free-radical species, which in turn can promote the decolorization extent and yield [32,33]. Maximum dye decolorization (100%) is observed at a catalyst dosage of 250 mg/L.…”

Highly efficient methyldiethanolamine (MDEA) removal and light naphtha purificationviasynergistic effect of molecular sieves and fixed adsorption bed

“…It is acknowledged that the adsorption effect of the adsorbents is different for different adsorbed substances, so the work we should do is to select a suitable adsorbent according to the nature of the adsorbate. 13X, a type of molecular sieve, has been widely used in chemical separations such as the adsorption of inorganics and organics because of its advantages of high porosity, [24][25][26] uniform pore size, 27,28 simple regeneration, 29,30 good regeneration performance, [31][32][33] etc. In addition, adsorbents such as silica gel and resin have also been used in chemical adsorption, and have achieved great results.…”