scholarly journals Synthesis and catalytic performance of a small crystal NaY zeolite with high SiO2/Al2O3 ratio

RSC Advances ◽  
2019 ◽  
Vol 9 (36) ◽  
pp. 20528-20535 ◽  
Author(s):  
Liang Mu ◽  
WeiWei Feng ◽  
Haobin Zhang ◽  
Xiubin Hu ◽  
Qingyan Cui
Keyword(s):  
Aging Time ◽  
Crystal Size ◽  
Catalytic Performance ◽  
Organic Template ◽  
Nay Zeolite ◽  
Silicon Source ◽  
Small Crystal

A small crystal NaY zeolite with a high SiO2/Al2O3 ratio was successfully synthesized with seeding and without organic template, and the effects of the silicon source, aging time and Na2O seeding content on the crystal size of the NaY zeolite were investigated.

Aging time effect on the synthesis of small crystal LTA zeolites in the absence of organic template

2007 ◽  
Vol 61 (23-24) ◽  
pp. 4655-4658 ◽  
Author(s):  
S. Alfaro ◽  
C. Rodríguez ◽  
M.A. Valenzuela ◽  
P. Bosch
Keyword(s):  
Aging Time ◽  
Time Effect ◽  
Organic Template ◽  
Small Crystal

Synthesis of ZSM-5 zeolite with small crystal size and its catalytic performance for ethylene oligomerization

Zeolites ◽  
1994 ◽  
Vol 14 (8) ◽  
pp. 643-649 ◽  
Author(s):  
Masami Yamamura ◽  
Kazutoshi Chaki ◽  
Toshiya Wakatsuki ◽  
Hideo Okado ◽  
Kaoru Fujimoto
Keyword(s):  
Crystal Size ◽  
Catalytic Performance ◽  
Ethylene Oligomerization ◽  
Small Crystal ◽  
Small Crystal Size

scholarly journals Selective Catalytic Oxidation of Toluene to Benzaldehyde: Effect of Aging Time and Calcination Temperature Using CuxZnyO Mixed Metal Oxide Nanoparticles

Catalysts ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 354
Author(s):  
Khadijah H. Alharbi ◽  
Ali Alsalme ◽  
Ahmed Bader A. Aloumi ◽  
Mohammed Rafiq H. Siddiqui
Keyword(s):  
Metal Oxide ◽  
Calcination Temperature ◽  
Aging Time ◽  
Metal Oxide Nanoparticles ◽  
Catalytic Performance ◽  
Molar Ratio ◽  
Mixed Metal Oxide ◽  
Toluene Oxidation ◽  
Mixed Metal ◽  
Selective Catalytic Oxidation

Oxidation is an important organic transformation, and several catalysts have been reported for this conversion. In this study, we report the synthesis of mixed metal oxide CuxZnyO, which is prepared by a coprecipitation method by varying the molar ratio of Cu and Zn in the catalytic system. The prepared mixed metal oxide CuxZnyO was evaluated for catalytic performance for toluene oxidation. Various parameters of the catalytic evaluation were studied in order to ascertain the optimum condition for the best catalytic performance. The results indicate that aging time, calcination temperature, reaction temperature, and feed rate influence catalytic performance. It was found that the catalyst interfaces apparently enhanced catalytic activity for toluene oxidation. The XRD diffractograms reveal the crystalline nature of the mixed metal oxide formed and also confirm the coexistence of hexagonal and monoclinic crystalline phases. The catalyst prepared by aging for 4 h and calcined at 450 °C was found to be the best for the conversion of toluene to benzaldehyde while the reactor temperature was maintained at 250 °C with toluene fed into the reactor at 0.01 mL/min. The catalyst was active for about 13 h.

scholarly journals Probing the surface reactivity of nanocrystals by the catalytic degradation of organic dyes: the effect of size, surface chemistry and composition

2017 ◽  
Vol 5 (23) ◽  
pp. 11917-11929 ◽  
Author(s):  
Jordi Piella ◽  
Florind Merkoçi ◽  
Aziz Genç ◽  
Jordi Arbiol ◽  
Neus G. Bastús ◽  
...  
Keyword(s):  
Surface Chemistry ◽  
Surface Coating ◽  
Crystal Size ◽  
Organic Dyes ◽  
Catalytic Performance ◽  
Surface Reactivity ◽  
Catalytic Degradation ◽  
Comprehensive Study

We herein present a comprehensive study on how the catalytic performance and reusability of Au nanocrystals (NCs) are affected by systematic variations of crystal size, surface coating and composition.

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