Cover Image

Effect of specific surface on the activities of binary Zr-Zn-O catalysts in the reaction of ethanol conversion

Tahmina Taghi, Vagif Baghiyev

Abstract


The activities of binary zirconium-zinc oxide catalysts in the reaction of ethanol conversion to acetone were studied. It has been established that with an increase in the reaction temperature, the yields of acetone, carbon dioxide, and acetaldehyde pass through a maximum. In contrast, the yield of ethylene increases over the entire temperature range studied. It was found that the dependences of the acetone yield and the ethanol conversion on the atomic ratio of zirconium to zinc have the form of a curve with two maxima. A maximal yield of acetone 58.2% was observed over catalyst Zr-Zn=8-2 at a temperature of 500°C. The specific surfaces of zirconium-zinc oxide catalysts have been studied. It has been established that the specific surface area of zirconium-zinc oxide catalysts varies in the ra.8 m2/g. The effect of the surface on the yields of ethanol conversion products has been studied. It has been shown that with an increase in the specific surface area of zirconium-zinc oxide catalysts, the yield of acetone passes through a maximum. In contrast, the yields of acetaldehyde, carbon dioxide, and ethylene practically do not change.


References


A. F. F.de Lima, C. R. Moreira, O. C. Alves, R. R.de Avillez, F. M. Z. Zotin, L. G. Appel, Acetone synthesis from ethanol and the Mars and Van Krevelen mechanism using CeO2 and AgCeO2 nanostructured catalysts, Applied Catalysis A: General, 2021, 611, 117949.

R. S. Murthy, P. Patnaik, P. Sidheswaran, M. Jayamani, Conversion of ethanol to acetone over promoted iron oxide catalysis, Journal of Catalysis, 1988, 109, 298-302.

J. Mück, J. Kocík, M. Hájek, Z. Tišler, K. Frolich, A. Kašpárek, Transition metals promoting Mg-Al mixed oxides for conversion of ethanol to butanol and other valuable products: Reaction pathways, Applied Catalysis A: General, 2021, 626, 118380.

A. Patel, A. R. Shah, Integrated lignocellulosic biorefinery: Gateway for production of second-generation ethanol and value-added products, Journal of Bioresources and Bioproducts, 2021, 6, 108-128.

T. Nakajima, K. Tanabe, T. Yamaguchi, I. Matsuzaki, S. Mishima, Conversion of ethanol to acetone over zinc oxide—calcium oxide catalyst optimization of catalyst preparation and reaction conditions and deduction of reaction mechanism, Applied Catalysis, 1989, 52, 237-248.

M. M. Mohammed, N. S. M. Ali, H. A. Alalwan, A. H. Alminshid, H. A. S. Aljaafari, Synthesis of ZnO-CoO/Al2O3 nanoparticles and its application as a catalyst in ethanol conversion to acetone, Results in Chemistry, 2021, 3, 100249.

T. Taghiyeva, V. Baghiyev, Phase composition and activity of Zr-Zn-O catalysts in the reaction of conversion ethanol, 2nd International Conference on Reaction Kinetics, Mechanisms and Catalysis, Catalysts in sustainable and green chemistry. Book of abstracts, 20-22 May 2021, 26.

T. Taghiyeva, X-ray diffraction of binary zinc-oxide catalysts, Azerbaijan Journal of Chemical News, 2022, 4, No.1, p.

J. W. Jung, Y. J. Lee, S. H. Um, P. J. Yoo, D. H. Lee, K.W. Jun, J. W. Bae, Effect of copper surface area and acidic sites to intrinsic catalytic activity for dimethyl ether synthesis from biomass-derived syngas, Applied Catalysis B: Environmental, 2012, 126, 1-8.

Q. Yu, R. Zhuang, W. Gao, H. Yi, X. Xie, Y. Zhang, X. Tang, Mesoporous Co3O4 with a large specific surface area derived from MCM-48 for catalytic oxidation of toluene. Journal of Solid State Chemistry, 2022, 307, 122802.

A.V. Vijayasankar, G. Santhosh, Role of incorporated transition metal on surface properties and catalytic activity of mesoporous vanadium aluminophosphates in the synthesis of tetrahydroquinolin-5-(1H)-ones, Chemical Data Collections, 2020, 28, 100419.




DOI: http://dx.doi.org/10.13171/mjc02210191648taghi

Copyright (c) 2022 Mediterranean Journal of Chemistry