Catalytic Properties of a Hierarchical Zeolite Synthesized from a Natural Aluminosilicate Mineral without the Use of a Secondary Mesoscale Template

ChemCatChem ◽  
2013 ◽  
Vol 5 (8) ◽  
pp. 2258-2269 ◽  
Author(s):  
Jiajia Ding ◽  
Haiyan Liu ◽  
Pei Yuan ◽  
Gang Shi ◽  
Xiaojun Bao
Keyword(s):  
Catalytic Properties ◽  
Hierarchical Zeolite ◽  
Natural Aluminosilicate ◽  
Aluminosilicate Mineral

Influence of Acid Wash on the Structural and Catalytic Properties of the Hierarchical Zeolite Y

2016 ◽  
Vol 1 (5) ◽  
pp. 934-939 ◽  
Author(s):  
Wenlin Li ◽  
Chunyan Tu ◽  
Jinyu Zheng ◽  
Yibin Luo ◽  
Zhijian Da
Keyword(s):  
Catalytic Properties ◽  
Zeolite Y ◽  
Hierarchical Zeolite ◽  
Acid Wash

scholarly journals Performance of Modified Natural Zeolites by Sodium Hydroxide Treatments in The Esterification of Glycerol and Oleic Acid

2019 ◽  
Vol 5 (2) ◽  
pp. 236-241
Author(s):  
Rizky Achmad Fauzi ◽  
Silvester Tursiloadi ◽  
Adid Adep Dwiatmoko ◽  
Dede Sukandar ◽  
Fauzan Aulia ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Fatty Acids ◽  
Sodium Hydroxide ◽  
Catalytic Properties ◽  
Natural Zeolites ◽  
Hierarchical Zeolite ◽  
Glycerol Conversion ◽  
Esterification Reactions ◽  
Zeolite Modification ◽  
Sodium Hydroxide Treatment

Esterification is the reaction of the formation of an ester compound by reacting an alcohol compound and carboxylic acid. In this study, the performance of zeolite-based catalysts has been studied for esterification reactions. Modification of zeolite pore size was done to be hierarchical zeolite, with the aim of increasing the catalytic properties of zeolite. The modification was carried out by desilication by sodium hydroxide treatment with a variation of 0.1; 0.3; 0.5 M. The resulting catalyst was then characterized using BET and XRD. Furthermore, the catalyst was tested for activity for esterification of fatty acids and glycerol and the product was analyzed using GC-MS. Zeolite modification with sodium hydroxide has been proven to improve catalyst performance, without changing their crystal structure. The best catalytic activity was obtained on the catalyst with sodium hydroxide treatment of 0.3 M, resulting glycerol conversion of 92% and selectivity to monoglycerides of 74%.

Remarkable catalytic properties of hierarchical zeolite-Beta in epoxide rearrangement reactions

2015 ◽  
Vol 243 ◽  
pp. 141-152 ◽  
Author(s):  
Rafael A. García-Muñoz ◽  
David P. Serrano ◽  
Gemma Vicente ◽  
María Linares ◽  
Dana Vitvarova ◽  
...  
Keyword(s):  
Catalytic Properties ◽  
Zeolite Beta ◽  
Hierarchical Zeolite ◽  
Rearrangement Reactions

Microstructure and reactivity of small metal particles: The role of Ce additives

1992 ◽  
Vol 50 (1) ◽  
pp. 318-319
Author(s):  
L.D. Schmidt ◽  
K. R. Krause ◽  
J. M. Schwartz ◽  
X. Chu
Keyword(s):  
Atmospheric Pressure ◽  
Noble Metals ◽  
Mixed Oxides ◽  
Catalytic Properties ◽  
Chemical Shifts ◽  
Catalytic Converter ◽  
Structural Evolution ◽  
Single Particles ◽  
Small Metal Particles

The evolution of microstructures of 10- to 100-Å diameter particles of Rh and Pt on SiO2 and Al2O3 following treatment in reducing, oxidizing, and reacting conditions have been characterized by TEM. We are able to transfer particles repeatedly between microscope and a reactor furnace so that the structural evolution of single particles can be examined following treatments in gases at atmospheric pressure. We are especially interested in the role of Ce additives on noble metals such as Pt and Rh. These systems are crucial in the automotive catalytic converter, and rare earths can significantly modify catalytic properties in many reactions. In particular, we are concerned with the oxidation state of Ce and its role in formation of mixed oxides with metals or with the support. For this we employ EELS in TEM, a technique uniquely suited to detect chemical shifts with ∼30Å resolution.

Electron distribution change of small nickel particles encaged in X zeolite in presence of Ce3+ ions, related to their catalytic properties

1986 ◽  
Vol 83 ◽  
pp. 619-621 ◽  
Author(s):  
F. Vergand ◽  
B. Iraqi ◽  
C. Bonnelle ◽  
E. Ramaroson ◽  
M.F. Guilleux ◽  
...  
Keyword(s):  
Electron Distribution ◽  
Catalytic Properties ◽  
Distribution Change ◽  
Nickel Particles ◽  
X Zeolite
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