Dehydrogenation of propane over sugar foams templated Ga 2 O 3 nanoparticles catalysts
- PDF / 2,571,287 Bytes
- 8 Pages / 595.276 x 790.866 pts Page_size
- 71 Downloads / 184 Views
Dehydrogenation of propane over sugar foams templated Ga2O3 nanoparticles catalysts Peng Jiang1 · Haoyue Fu1 · Hongfang Ma1 · Weixin Qian1 · Haitao Zhang1 · Weiyong Ying1 Received: 31 August 2020 / Accepted: 30 October 2020 © Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract Highly active Ga2O3 nanoparticles catalysts were prepared by one-step oxidative decomposition of gallium nitrate with sucrose-derived carbon foams (SCF) template. The catalysts were investigated by XRD, Ar physisorption, SEM–EDS, HRTEM, TGA, N H3-TPD and 71 Ga MAS NMR. The addition of sucrose facilitated the higher surface area of G a2O3 nanoparticles and morphological transformation from bulk to flake due to the structure-directing role of the sucrose solution. Moreover, the weak-medium surface acid sites increased by adding sucrose properly, which was related to the larger number XCF-Ga2O3 catalysts at the sucrose/Ga2O3 of tetrahedral G a3+ cations. The optimum catalytic activity was achieved over S molar ratio of 6 with the propane conversion of 46.63% and propene selectivity of 88.18%.
Electronic supplementary material The online version of this article (https://doi.org/10.1007/s10562-020-03452-0) contains supplementary material, which is available to authorized users. Extended author information available on the last page of the article
13
Vol.:(0123456789)
P. Jiang et al.
Graphic abstract
Keywords Propane dehydrogenation · Ga2O3 nanoparticles · Sucrose · Carbon foams
1 Introduction Propene is the second most important raw material after ethylene, being widely used to synthesize high value-added chemicals such as polypropylene, acrylonitrile, propylene oxide and acrylic acid [1]. With the rapid development of propene derivative products, propene which traditionally produced by steam cracking and fluid catalytic cracking of naphtha, is difficult to meet the increasing demands of the propene market [2–4]. Nowadays, the catalytic dehydrogenation of propane to propene draws intense attention because it provides a new route to obtain propene from poorly reactive and low-cost saturated feedstock [5–7]. Furthermore, oxidative dehydrogenation of propane (OPDH) with CO2 has been proved to be an attractive alternative way to produce propene [8]. In the OPDH reaction, C O2 as a mild oxidant, not only enhances equilibrium conversion of propane by removing hydrogen through reverse water–gas shift reaction, but also stabilizes the catalyst by suppressing coke deposition through the reverse Boudouard reaction [9, 10]. Gallium oxide was found to be an effective catalyst for dehydrogenation of propane in the presence of C O2 [11].
13
Over the past decade, strenuous efforts have been made at the Ga2O3-based mixed oxide catalysts and the supported G a 2O 3 catalysts to improve the catalytic performance [12–15]. Although it was reported that catalytic activity of Ga2O3 is closely related to the surface acidity, it is still a great challenge to reveal the nature of the active sites in detail, becaus
Data Loading...
