Wet Oxidation of Formaldehyde with Heterogeneous Catalytic Materials

Gutiérrez-Arzaluz, Mirella; Torres-Rodríguez, Miguel; Múgica-Álvarez, Violeta; Aguilar-Pliego, Julia; Romero-Romo, Mario

doi:10.7763/ijesd.2016.v7.761

Cited by 6 publications

(2 citation statements)

References 15 publications

(19 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Other authors have reported the production of low molecular weight carboxylic acids and, more importantly, formic acid, a highly refractive compound, when carrying out the HCOH CWO reaction [26,27]. In previous work [28], which was also during formaldehyde removal, the presence of carboxylic acids as secondary reaction products using a Pt/Al 2 O 3 powder catalyst was observed.…”

Section: Resultsmentioning

confidence: 98%

Catalysts with Cerium in a Membrane Reactor for the Removal of Formaldehyde Pollutant from Water Effluents

et al. 2016

Self Cite

View full text Add to dashboard Cite

Abstract:We report the synthesis of cerium oxide, cobalt oxide, mixed cerium, and cobalt oxides and a Ce-Co/Al 2 O 3 membrane, which are employed as catalysts for the catalytic wet oxidation (CWO) reaction process and the removal of formaldehyde from industrial effluents. Formaldehyde is present in numerous waste streams from the chemical industry in a concentration low enough to make its recovery not economically justified but high enough to create an environmental hazard. Common biological degradation methods do not work for formaldehyde, a highly toxic but refractory, low biodegradability substance. The CWO reaction is a recent, promising alternative that also permits much lower temperature and pressure conditions than other oxidation processes, resulting in economic benefits. The CWO reaction employing Ce-and Co-containing catalysts was carried out inside a slurry batch reactor and a membrane reactor. Experimental results are reported. Next, a mixed Ce-Co oxide film was supported on an γ-alumina membrane used in a catalytic membrane reactor to compare formaldehyde removal between both types of systems. Catalytic materials with cerium and with a relatively large amount of cerium favored the transformation of formaldehyde. Cerium was present as cerianite in the catalytic materials, as indicated by X-ray diffraction patterns.

show abstract

Section: Resultsmentioning

confidence: 98%

Catalysts with Cerium in a Membrane Reactor for the Removal of Formaldehyde Pollutant from Water Effluents

et al. 2016

Self Cite

View full text Add to dashboard Cite

show abstract

“…45 The spiculate band at 1745 cm −1 belongs to the carbonyl group (CO) of HCHO, 46 which suggests that HCHO molecules are oxidized to HCOO − species over catalysts in the presence of O 2 and H 2 O. The band at 1530 cm −1 can be ascribed to the formation of carbonate species (CO 3 2− ), 47 indicating that CO 3 2− species are formed and accumulated during the oxidation of HCHO over catalysts. Two bands located at 3850 and 3735 cm −1 are assigned to the characteristic vibrations of hydroxyl (OH) groups on catalysts.…”

Section: Environmental Science and Technologymentioning

confidence: 99%

Active Site-Directed Tandem Catalysis on Single Platinum Nanoparticles for Efficient and Stable Oxidation of Formaldehyde at Room Temperature

Huang

et al. 2019

Environ. Sci. Technol.

View full text Add to dashboard Cite

The application of tandem catalysis is rarely investigated in degrading organic pollutants in the environment. Herein, a tandem catalyst on single platinum (Pt) nanoparticles (Pt0 NPs) is prepared for the sequential degradation of formaldehyde (HCHO) to carbon dioxide gas [CO2(g)] at room temperature. The synthesis approach includes coating of uniform Pt NPs on SrBi2Ta2O9 platelets using a photoreduction process, followed by calcination of the sample in the atmosphere to tune partial transformation of Pt0 atoms to Pt2+ ions in the tandem catalyst. The conversion of HCHO to CO2(g) is monitored by in situ Fourier transform infrared spectroscopy, which shows first conversion of HCHO to CO3 2– ions onto Pt0 active sites and subsequently the conversion of CO3 2– ions to CO2(g) by neighboring Pt2+ species of the catalyst. The later process with Pt2+ species does not allow CO3 2– poisoning of the catalyst. The enhanced activity of the prepared tandem catalyst to oxidize HCHO is maintained continuously for 680 min. Comparatively, the catalyst without Pt2+ shows activity for only 40 min. Additionally, the tandem catalyst presented herein performs better than the Pt/titanium dioxide (TiO2) catalyst to degrade HCHO. Overall, the tandem catalyst may be applied to degrade organic pollutants efficiently.

show abstract

Formaldehyde CWO with gold nanoparticles in a forced through flow catalytic-membrane reactor

et al. 2020

View full text Add to dashboard Cite

Wet Oxidation of Formaldehyde with Heterogeneous Catalytic Materials

Cited by 6 publications

References 15 publications

Catalysts with Cerium in a Membrane Reactor for the Removal of Formaldehyde Pollutant from Water Effluents

Catalysts with Cerium in a Membrane Reactor for the Removal of Formaldehyde Pollutant from Water Effluents

Active Site-Directed Tandem Catalysis on Single Platinum Nanoparticles for Efficient and Stable Oxidation of Formaldehyde at Room Temperature

Formaldehyde CWO with gold nanoparticles in a forced through flow catalytic-membrane reactor

Contact Info

Product

Resources

About