Neodymium-doped alkaline-earth oxide catalysts for propane oxidative dehydrogenation. Part II. Catalytic properties

Savova, Bistra; Filkova, D.; Crışan, D.; Crışan, Maria; Răileanu, Mina; Drăgan, Nicolae; Petrov, L.; Védrine, J.C.

doi:10.1016/j.apcata.2009.02.019

Cited by 13 publications

(3 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…ODH of light alkanes, which allows the production of highly demanded alkenes, is an important field of research in selective oxidation catalysis. 149,[153][154][155] Catalytic formulations based on vanadia or niobia are among the most investigated. Niobium oxide is rather poorly active but selective while vanadium oxide is active under oxidizing conditions but poorly selective (CO, CO 2 and various oxygenates are classical side products).…”

Section: Oxide and Mixed Oxide Catalystsmentioning

confidence: 99%

Non-hydrolytic sol–gel routes to heterogeneous catalysts

2012

View full text Add to dashboard Cite

Oxides and mixed oxides have a tremendous importance in the field of heterogeneous catalysis, serving either as catalysts or as supports for active species. The performance of a catalyst depends directly on its composition, texture, structure and surface properties, which have to be precisely controlled and adapted to each application. In this context, the sol-gel process is a unique tool for the preparation and understanding of catalytic materials, owing to its exceptional versatility. In the last 10 years, the non-hydrolytic sol-gel (NHSG) or non-aqueous sol-gel process based on nonhydrolytic condensations in nonaqueous media has established itself as a simple and powerful method for the design of a wide range of oxide, mixed oxide and hybrid materials with controlled composition, morphology, texture and structure. NHSG proved particularly interesting for the preparation of catalytic materials, notably mesoporous xerogels, single site catalysts and highly crystalline nanoparticles. This critical review addresses the application of NHSG to the preparation of heterogeneous catalysts, emphasizing the specificities of this process, and giving a comprehensive overview of the literature (251 references).

show abstract

Section: Oxide and Mixed Oxide Catalystsmentioning

confidence: 99%

Non-hydrolytic sol–gel routes to heterogeneous catalysts

2012

View full text Add to dashboard Cite

show abstract

“…A strong concern is the production of particles with high crystallinity and well-defined morphology in order to provide model systems for studying chemical and physical behaviors of high surface area materials. In such context, nanostructured alkaline earth oxides and especially magnesium oxide-which is encountered in a number of domains such as geochemistry, catalysis and optics-are of significant relevance [6][7][8][9][10][11]. This has prompted the synthesis of MgO powders by different preparation methods.…”

Section: Introductionmentioning

confidence: 99%

Nucleation and growth concepts applied to the formation of a stoichiometric compound in a gas phase: The case of MgO smoke

Stankic

Cottura

Demaille

et al. 2011

Journal of Crystal Growth

View full text Add to dashboard Cite

“…Therefore, the present work would focus on the promotor effect of the Cr-based catalyst where a commercial SiO 2 is chosen as the support, and the metal elements including Zr, Ce, Sr, and Sn would be introduced into the base sample Cr/SiO 2 as promotors because: (i) the introduction of ZrO 2 can improve the acid–base and redox properties, generate abundant oxygen vacancies; ,, (ii) CeO 2 shows very strong capacity in oxygen storage, release, and transport; − (iii) Sr could be incorporated into the catalyst matrix and thus modify the acid–base property. The deep oxidation of ethane is expected to be limited; , (iv) the existence of Sn can restrict the side reactions, and improve the coke resistance. − This series of promoted catalysts is prepared by the conventional incipient wetness impregnation (ICI) method, and characterized by various techniques to obtain the physicochemical properties which are further correlated with catalytic performances in dehydrogenation of ethane in the presence of CO 2 .…”

Section: Introductionmentioning

confidence: 99%

Improved Catalytic Performance of Ethane Dehydrogenation in the Presence of CO₂ over Zr-Promoted Cr/SiO₂

Liu

Chen

et al. 2019

ACS Omega

View full text Add to dashboard Cite

The Zr-, Ce-, Sr-, and Sn-promoted Cr/SiO2 catalysts were prepared by the incipient wetness impregnation method, then characterized by N2 adsorption/desorption, X-ray diffraction, X-ray photoelectron spectroscopy, H2-TPR, CO2-TPD, UV–vis, high-angle annular dark-field imaging–scanning transmission electron microscopy—energy dispersive X-ray spectroscopy elemental mapping, Raman, and thermogravimetric techniques to study the structural evolution under the preparation/reaction conditions, and applied to catalyze ethane oxidative dehydrogenation with CO2. The results suggested that the Cr6+ species were indispensable for activating the dehydrogenation reaction thanks to the oxidation–reduction cycle between Cr6+ and Cr3+. The type of the promotor also affected significantly the ability of replenishing the lattice oxygen through the disassociation of CO2, leading to the different catalytic performances. The Zr-promoted sample had the best performance in converting the reactants as well as the catalytic stability.

show abstract

Neodymium-doped alkaline-earth oxide catalysts for propane oxidative dehydrogenation. Part II. Catalytic properties

Cited by 13 publications

References 33 publications

Non-hydrolytic sol–gel routes to heterogeneous catalysts

Non-hydrolytic sol–gel routes to heterogeneous catalysts

Nucleation and growth concepts applied to the formation of a stoichiometric compound in a gas phase: The case of MgO smoke

Improved Catalytic Performance of Ethane Dehydrogenation in the Presence of CO₂ over Zr-Promoted Cr/SiO₂

Contact Info

Product

Resources

About

Neodymium-doped alkaline-earth oxide catalysts for propane oxidative dehydrogenation. Part II. Catalytic properties

Cited by 13 publications

References 33 publications

Non-hydrolytic sol–gel routes to heterogeneous catalysts

Non-hydrolytic sol–gel routes to heterogeneous catalysts

Nucleation and growth concepts applied to the formation of a stoichiometric compound in a gas phase: The case of MgO smoke

Improved Catalytic Performance of Ethane Dehydrogenation in the Presence of CO2 over Zr-Promoted Cr/SiO2

Contact Info

Product

Resources

About

Improved Catalytic Performance of Ethane Dehydrogenation in the Presence of CO₂ over Zr-Promoted Cr/SiO₂