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Heterogeneous Chemistry of Monocarboxylic Acids on Α-al2O3 at Ambient Condition : Volume 10, Issue 2 (10/02/2010)

By Tong, S. R.

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Book Id: WPLBN0003987127
Format Type: PDF Article :
File Size: Pages 38
Reproduction Date: 2015

Title: Heterogeneous Chemistry of Monocarboxylic Acids on Α-al2O3 at Ambient Condition : Volume 10, Issue 2 (10/02/2010)  
Author: Tong, S. R.
Volume: Vol. 10, Issue 2
Language: English
Subject: Science, Atmospheric, Chemistry
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Historic
Publication Date:
2010
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Citation

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Wang, W. G., Wu, L. Y., Ge, M. F., Pu, Z. F., & Tong, S. R. (2010). Heterogeneous Chemistry of Monocarboxylic Acids on Α-al2O3 at Ambient Condition : Volume 10, Issue 2 (10/02/2010). Retrieved from http://ebooklibrary.org/


Description
Description: Beijing National Laboratory for Molecular Sciences (BNLMS), State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, 100190, Beijing, China. A study of the atmospheric heterogeneous reactions of formic acid, acetic acid, and propionic acid on dust particles (Α-Al2O3) was performed at ambient condition by using a diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) reactor. From the analysis of the spectral features, observations of carboxylates formation provide strong evidence for an efficient reactive uptake process. Comparison of the calculated and experimental vibrational frequencies of adsorbed carboxylates establishes the bridging coordinated structures on the surface. The uptake coefficients of formic acid, acetic acid, and propionic acid on Α-Al2O3 particles are (2.07±0.26)×10−3, (5.00±0.69)×10−3, and (3.04±0.63)×10−3, respectively (using geometric area). Besides, the effect of various relative humid (RH) on this heterogeneous reactions was studied. The uptake coefficients of monocarboxylic acids on Α-Al2O3 particles increase initially (RH<20%) and then decrease with the increased RH (RH>20%) which was due to the effect of water on carboxylic acids solvation, particles surface hydroxylation, and competition on reactive site. On the basis of the results of experimental simulation, the mechanism of heterogeneous reaction of dust with carboxylic acids at ambient condition was discussed. The loss of atmospheric monocarboxylic acids due to reactive uptake on available mineral dust particles can be competitive with homogeneous loss pathways, especially in dusty urban and desertified environments.

Summary
Heterogeneous chemistry of monocarboxylic acids on Α-Al2O3 at ambient condition

Excerpt
Al-Abadleh, H. A., Al-Hosney, H. A., and Grassian, V. H.: Oxide and carbonate surface composition and surface reactivity, J. Mol. Catal. A-Chem., 228, 47–54, 2005.; Al-Abadleh, H. A. and Grassian, V. H.: FT-IR study of water adsorption on aluminium oxide surfaces, Langmuir, 19, 341–347, 2003.; Al-Hosney, H. A., Carlos-Cuellare, S., Baltrusaitis, J., and Grassian, V. H.: Heterogeneous uptake and reactivity of formic acid on calcium carbonate particles: a Knudsen cell reactor, FTIR and SEM study, Phys. Chem. Chem. Phys., 7, 3587–3595, 2005.; Alcock, N. W., Tracy, V. M., and Waddington, T. C.: Acetates and acetate-complexes, Part 2: Spectroscopic studies, J. Chem. Soc., Dalton Trans., 2243–2246, 1976.; Amenomiya, Y.: Active sites of solid acidic catalysts: III. Infrared study of the water gas conversion reaction on alumina, J. Catal., 57, 64–71, 1979.; Averett, L. A. and Griffiths, P. R.: Method to improve linearity of diffuse reflection mid-infrared spectroscopy, Anal. Chem., 78, 8165–8167, 2006.; Aymoz, G., Jaffrezo, J.-L., Jacob, V., Colomb, A., and George, C.: Evolution of organic and inorganic components of aerosol during a Saharan dust episode observed in the French Alps, Atmos. Chem. Phys., 4, 2499–2512, 2004.; Baltrusaitis, J., Schuttlefield, J., Jensen, J. H., and Grassian, V. H.: FTIR spectroscopy combined with quantum chemical calculations to investigate adsorbed nitrate on aluminium oxide surfaces in the presence and absence of co-adsorbed water, Phys. Chem. Chem. Phys., 9, 4970–4980, 2007.; Bertie, J. E. and Michaelian, K. H.: The Raman spectrum of gaseous acetic acid at 21 {\degree}C, J. Chem. Phys., 77, 5267–5271, 1982.; Bartholomew, R. J. and Irish, D. E.: Raman spectral studies of solutions at elevated temperatures and pressures, 13. Sodium formate-water, Can. J. Chem., 71, 1728–1733, 1993.; Boehm, H. P.: Acidic and basic properties of hydroxylated metal oxide surfaces, Discuss. Faraday Soc., 52, 264–275, 1971.; Börensen, C., Kirchner, U., Scheer, V., Vogt, R., and Zellner, R.: Mechanism and kinetics of the reaction of NO2 or HNO3 with alumina as a mineral dust model compound, J. Phys. Chem. A, 104, 5036–5045, 2000.; Brown, N. M. D., Floyd, R. B., and Walmsley, D. G.: Inelastic electron tunnelling spectroscopy (IETS) of carboxylic acids and related systems chemisorbed on plasma-grown aluminium oxide. Part 1: Formic acid (HCOOH and DCOOD), acetic acid (\chem{CH_3COOH}, \chem{CH_3COOD} and \chem{CD_3COOD}), trifluoroacetic acid, acetic anhydride, acetaldehyde and acetylchloride, J. Chem. Soc. Faraday T., 2(75), 17–31, 1979.; Butkovskaya, N. I., Kukui, A., Pouvesle, N., and Le Bras, G.: Rate constant and mechanism of the reaction of OH radicals with acetic acid in the temperature range of 229–300 K, J. Phys. Chem. A, 108, 7021–7026, 2004.; Carlos-Cuellar, S., Li, P., Christensen, A. P., Krueger, B. J., Burrichter, C., and Grassian, V. H.: Heterogeneous uptake kinetics of volatile organic compounds on oxide surfaces using a Knudsen cell reactor: adsorption of acetic acid, formaldehyde, and methanol on α-\chem{Fe_2O_3}, α-\chem{Al_2O_3}, and \chem{SiO_2}, J. Phys. Chem. A, 107, 4250–4261, 2003.

 

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