scholarly journals Hydrotreatment of lignin dimers over NiMoS-USY: effect of silica/alumina ratio

2021 ◽  
Author(s):  
Muhammad Abdus Salam ◽  
You Wayne Cheah ◽  
Phuoc Hoang Ho ◽  
Louise Olsson ◽  
Derek Creaser
Keyword(s):  
Y Zeolites ◽  
Silica Alumina ◽  
Silica Alumina Ratio ◽  
Autoclave Reactor

Sulfides of NiMo over a series of commercial ultra-stable Y zeolites were studied in an autoclave reactor to elucidate the effect of Silica/Alumina ratio (SAR=12, 30, and 80) on the...

Fast synthesis of submicron aluminosilicate (low silica/alumina ratio) zeolites under solventless microwave radiation

RSC Advances ◽  
2015 ◽  
Vol 5 (116) ◽  
pp. 95463-95466 ◽  
Author(s):  
Shangjing Zeng ◽  
Runwei Wang ◽  
Yongcun Zou ◽  
Jingru Fu ◽  
Zhongtao Zhang ◽  
...  
Keyword(s):  
Microwave Radiation ◽  
Silica Alumina ◽  
Fast Synthesis ◽  
Silica Alumina Ratio

Sub-micron aluminosilicate zeolites with a low silica/alumina ratio are successfully synthesized by microwave solventless method.

Phenol hydrodeoxygenation: effect of support and Re promoter on the reactivity of Co catalysts

2016 ◽  
Vol 6 (19) ◽  
pp. 7289-7306 ◽  
Author(s):  
I. T. Ghampson ◽  
C. Sepúlveda ◽  
A. B. Dongil ◽  
G. Pecchi ◽  
R. García ◽  
...  
Keyword(s):  
Co Catalysts ◽  
Oxide Support ◽  
Silica Alumina ◽  
Effect Of Support ◽  
Autoclave Reactor

In this work, the reactivity of supported Co catalysts as a function of the oxide support (alumina, silica-alumina, zirconia and titania) and Re promoter for the hydrodeoxygenation of phenol at 300 °C and 3 MPa H2 using a batch autoclave reactor was investigated.

Coke removal of the HZSM-12 zeolite with different silica/alumina ratio

2004 ◽  
Vol 75 (2) ◽  
pp. 699-704 ◽  
Author(s):  
A. O. S. Silva ◽  
M. J. B. Souza ◽  
J. M. F. B. Aquino ◽  
V. J. Fernandes Jr. ◽  
A. S. Araújo
Keyword(s):  
Silica Alumina ◽  
Coke Removal ◽  
Silica Alumina Ratio

The Preparation of Modified ZSM - 35 and its Catalysis Effect Analysis on N-Butene Isomerization

2014 ◽  
Vol 898 ◽  
pp. 140-143 ◽  
Author(s):  
Yun Feng Hu ◽  
Bo Yang ◽  
Lin Jie Hu ◽  
Li Jie Liu
Keyword(s):  
Molecular Sieve ◽  
Porous Silica ◽  
Isomerization Reaction ◽  
Effect Analysis ◽  
Nitrogen Dilution ◽  
Silica Alumina ◽  
Porous Silica Gel ◽  
Reaction Performance ◽  
Silica Alumina Ratio ◽  
Butene Isomerization

In order to study the effect that the modified ZSM - 35 as a catalyst brings to n-butene isomerization catalysis. In this paper, by considering the performance analysis brought by different silica alumina ratio, reaction temperature, concentration of nitrogen and macro porous silica gel embellish acting on butene isomerization reaction of modified ZSM - 35 molecular sieve catalyst , Al2O3 samples being "15" shows better performance; Adding appropriate amount of silicon carbide catalyst or modified silicone can further improve the selectivity of butene; Nitrogen dilution has certain help in improving butene isomerization reaction performance.

scholarly journals Effect of Metal Addition and Silica/Alumina Ratio of Zeolite on the Ethanol-to-Aromatics by Using Metal Supported ZSM-5 Catalyst

2013 ◽  
Vol 51 (4) ◽  
pp. 418-425 ◽  
Author(s):  
Han-Gyu Kim ◽  
Yoon-Cheol Yang ◽  
Kwang-Eun Jeong ◽  
Tae-Wan Kim ◽  
Soon-Yong Jeong ◽  
...  
Keyword(s):  
Silica Alumina ◽  
Metal Addition ◽  
Silica Alumina Ratio

scholarly journals MICROW AVE-ASSISTED SYNTHESIS OF LOW-SILICA/ALUMINA-RATIO ZEOLITES FROM GEOTHERMAL SILICA

2011 ◽  
Vol 56 (3) ◽  
pp. 752-758 ◽  
Author(s):  
BEATRIZ DE LEÓN ◽  
PRÓCORO GAMERO ◽  
CECILIA MONTERO-OCAMPO ◽  
GREGORIO VARGAS ◽  
J. IVÁN ESCALANTE-GARCÍA ◽  
...  
Keyword(s):  
Silica Alumina ◽  
Silica Alumina Ratio

Acid site properties of thermally stable, silica-doped alumina as a function of silica/alumina ratio and calcination temperature

2014 ◽  
Vol 482 ◽  
pp. 16-23 ◽  
Author(s):  
Maryam Khosravi Mardkhe ◽  
Kamyar Keyvanloo ◽  
Calvin H. Bartholomew ◽  
William C. Hecker ◽  
Todd M. Alam ◽  
...  
Keyword(s):  
Calcination Temperature ◽  
Acid Site ◽  
Thermally Stable ◽  
Silica Alumina ◽  
Silica Alumina Ratio

Laterite and lateritic soils in Sierra Leone

1927 ◽  
Vol 17 (4) ◽  
pp. 530-547 ◽  
Author(s):  
F. J. Martin ◽  
H. C. Doyne
Keyword(s):  
Sierra Leone ◽  
Clay Fraction ◽  
Lateritic Soils ◽  
Silica Alumina ◽  
Silica Alumina Ratio

(1) The formation of laterite and lateritic soils in Sierra Leone has been studied and the mode of formation and the composition of these soils is described.(2) It is suggested that since the clay fraction is regarded as the most important fraction in determining the reactions of a soil the classification of laterite and lateritic soils should be based on an examination of the clay fraction. It is further suggested that where the silica/alumina ratio in the clay fraction falls below 2·0 the soil should be described as “lateritic,” and where this ratio falls below 1·33 the soil should be described as laterite.

Secondary Cation Effects On Sodium And Potassium Zeolite Syntheses at Si/Al2 = 9: Part 1- Phase Development in the Sodium System

1987 ◽  
Vol 111 ◽  
Author(s):  
David E. W. Vaughan
Keyword(s):  
Cation Effects ◽  
Phase Development ◽  
Small Crystals ◽  
Sodium System ◽  
Secondary Building Units ◽  
Silica Alumina ◽  
Alkyl Ammonium ◽  
Silica Alumina Ratio ◽  
Sodium And Potassium ◽  
Platelet Formation

AbstractThe influence of Group 1A elements, and various alkyl ammonium cations, on a metastable faujasite synthesis at a silica/ alumina ratio of 9 are reported. Co-crystallization of faujasite, gmelinite and gismondine (P) occurs in reactions with Li+, K+ and Rb+, but the trapping of Cs+ in the FAU sodalite cage (CSZ-1/ CSZ-3) inhibits subsequent reactions to GIS, and blocks the formation of GME. Morphological effects of these cations include platelet formation and the promotion of small crystals. TMA addition promotes mazzite analogues; and DEDM stabilizes FAU, and at 140°C., induces the crystallization of ECR-1. The derivation of all these phases from a restricted number of secondary building units is discussed.

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