Study of Ethanol/Acetaldehyde to 1,3-Butadiene Over MgO–SiO2 Catalyst: Comparative Investigation of Deactivation Behaviour Due to Carbon Deposition

Zhang, Minhua; Qin, Yunan; Tan, Xuechao; Wang, Lingtao; Yu, Yingzhe; Jiang, Haoxi

doi:10.1007/s10562-019-03049-2

Cited by 15 publications

(9 citation statements)

References 41 publications

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“…139,142 Recently, Zhang et al demonstrated that pure magnesium silicates were active in the two-step process, reaching butadiene selectivity comparable, albeit inferior, to MgO-SiO 2 , confirming their coupling activity. 182 Weckhuysen et al further established a correlation between the ethylene yield and the relative amount of amorphous hydrous magnesium silicate phase (Fig. 26(b)).…”

Section: Catalysis Science and Technologymentioning

confidence: 93%

“…109 In studying the deactivation of MgO-SiO 2 in the Ostromislensky process, Zhang et al demonstrated that the nature of deposited carbonaceous species differed depending on their location of the surface with a multi-level extraction method. 182 CCl 4 was used for the outer surface, CHCl 2 for middle layers and CHCl 2 following catalyst dissolution in HF for the inner layers of the catalyst. The authors determined by GC-MS that chained alkanes were predominant on the outer surface and aromatic species within the pores of the spent catalyst.…”

Section: Catalysis Science and Technologymentioning

confidence: 99%

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Ethanol-to-butadiene: the reaction and its catalysts

Pomalaza

Ponton

Capron

et al. 2020

Catal. Sci. Technol.

117

107

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Section: Catalysis Science and Technologymentioning

confidence: 93%

Section: Catalysis Science and Technologymentioning

confidence: 99%

Ethanol-to-butadiene: the reaction and its catalysts

Pomalaza

Ponton

Capron

et al. 2020

Catal. Sci. Technol.

117

107

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“…In general, 35 %CdS/5 %Au/HNb 3 O 8 has a good stability. However, the catalytic activity decreased significantly in the fifth cycle, which may be due to the carbon species of organic matter occupying the active site on the surface of the catalyst during the reaction, [56] or the photocorrosion of the CdS‐based catalyst during the photocatalytic process [57] …”

Section: Resultsmentioning

confidence: 99%

Ultrathin Niobate Nanosheet Assembly with Au NPs and CdS QDs as a Highly Efficient Photocatalyst

Zhang

et al. 2022

Chemistry A European J

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Niobate nanosheets have aroused widespread interest in recent years for their prospects in catalysis. The exploration of 2D niobate catalysis with stable and efficient properties is still the focus in chemistry and materials science. Herein, the successful fabrication of 2D CdS/Au/HNb 3 O 8 catalyst is demonstrated which revealed efficient photocatalytic properties in H 2 evolution, oxidative self-coupling of amines to imines, and degradation of dyes. Especially the assembled architecture can give a rate of 5.85 mmol • g À 1 • h À 1 of photocatalytic H 2 evolution, an ~254-fold enhancement, compared with bare HNb 3 O 8 nanosheets under identical conditions. In accordance with density functional theory (DFT) and X-ray adsorption fine structure (XAFS) analyses, the vast improvements are benefited from efficient migration and separation of charge carriers. Besides, the surface plasma resonance (SPR) effect of Au NPs enhances the light harvesting capacity and boosts the generation of hot electrons, efficiently improving the visible-light absorption.

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“…In the reaction conditions, water vapor, being a more efficient oxidizing agent than O 2 , can oxidize C 6+ compounds at the time of their formation when their reactivity is still high. Also, the blocking of strong acid sites being active in the formation of C 6+ compounds, , as a result of water vapor adsorption, helps to reduce the formation rate of these compounds. However, this topic will be the subject of a separate study.…”

Section: Resultsmentioning

confidence: 99%

Design of Effective Catalysts Based on ZnLaZrSi Oxide Systems for Obtaining 1,3-Butadiene from Aqueous Ethanol

Larina

Shcherban

Kyriienko

et al. 2020

ACS Sustainable Chem. Eng.

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ZnLaZrSi oxide systems prepared with a silica component of the different nature have been studied in 1,3-butadiene production from aqueous ethanol. The following silica materials were used: KSKG, A-175, A-380, SBA-15, MCM-41, MCM-48, MCF and dealuminated BEA zeolites. The characteristics of the porous structure of the silica support, such as porosity, pore size distribution, specific and external surface areas, were found not to be critical parameters for achieving a high 1,3-butadiene yield during the EtOH-H 2 O mixture conversion in the presence of ZnLaZrSi oxide catalysts. On the contrary, the quantity and strength of Lewis acid sites, which in turn differ depending on the choice of silica material, have a significant impact on 1,3-butadiene selectivity and yield. The highest values of the selectivity of 1,3-butadiene formation (up to 68 %) and yield as well as stability toward deactivation in the presence of H 2 O were achieved over ZnLaZr-KSKG, ZnLaZr-SBA-15 and ZnLa-Zr 1 SiBEA (with mononuclear isolated tetrahedral Zr(IV) species). The productivity of ZnLa-Zr 1 SiBEA catalyst accounts for 0.324 g 1,3-BD •g cat -1 •h -1 (T = 648К, WHSV = 2.88 h -1 , 80 vol% EtOH in water as an EtOH source). The main reason for the decrease in 1,3-butadiene yield in the presence of H 2 O in the reaction mixture was shown to be a deactivation of acetaldehyde condensation sites on the catalyst surface, while the rate of acetaldehyde formation decreases slightly. According to 1 H-13 C CP/MAS NMR spectroscopic results, the use of aqueous ethanol as the feed for ETB-process is very advantage to prevent the carburization of the catalysts.= 2.88 h -1 , 80 vol% EtOH in water as an EtOH source). Therefore, for industrial realization of ETB process the development of the effective catalysts based on dealuminated BEA zeolites is also promising. ASSOCIATED CONTENTSupporting Information. The following file is available free of charge. 29Si and 1 H -29 Si CP MAS NMR spectra of ZnLa-Zr 3 SiBEA sample, SEM images of the ZnLaZrSi samples at three magnifications, the indices of EtOH-water mixture conversion in the presence of ZnLaZrSi oxide systems, the indices of ETB process in the presence of 2 %ZnO/6 %ZrO 2 -KSKG (DOCX).

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Study of Ethanol/Acetaldehyde to 1,3-Butadiene Over MgO–SiO2 Catalyst: Comparative Investigation of Deactivation Behaviour Due to Carbon Deposition

Cited by 15 publications

References 41 publications

Ethanol-to-butadiene: the reaction and its catalysts

Ethanol-to-butadiene: the reaction and its catalysts

Ultrathin Niobate Nanosheet Assembly with Au NPs and CdS QDs as a Highly Efficient Photocatalyst

Design of Effective Catalysts Based on ZnLaZrSi Oxide Systems for Obtaining 1,3-Butadiene from Aqueous Ethanol

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