Measurement of the relative acid strength and acid amount of solid acids by argon adsorption

2004 ◽  
Vol 6 (9) ◽  
pp. 2529 ◽  
Author(s):  
Hiromi Matsuhashi ◽  
Kazushi Arata
Keyword(s):  
Solid Acids ◽  
Acid Strength ◽  
Acid Amount ◽  
Argon Adsorption

Determination of relative acid strength and acid amount of solid acids by Ar adsorption

2006 ◽  
Vol 111 (3-4) ◽  
pp. 338-342 ◽  
Author(s):  
Hiromi Matsuhashi ◽  
Ayumi Futamura
Keyword(s):  
Solid Acids ◽  
Acid Strength ◽  
Acid Amount

Relationships Between Acidity and Catalytic Performance of Solid Acid in Synthesis of Linear Alkyl Benzene (LAB)

2011 ◽  
Vol 233-235 ◽  
pp. 1447-1450
Author(s):  
Jie Ren ◽  
Yin Shan Lou ◽  
Hai Kuan Yuan ◽  
Lian Shen
Keyword(s):  
Rate Constant ◽  
Solid Acid ◽  
Catalytic Performance ◽  
Acid Strength ◽  
Fixed Bed Reactor ◽  
Alkylation Reaction ◽  
Desorption Kinetics ◽  
Activation Temperature ◽  
Acid Amount ◽  
Kinetics Of

Through the benzene alkylation experiments with long chain olefin over solid acid catalysts activated at different temperature in the fixed-bed reactor, the kinetics of alkylation reaction and the deactivation kinetics of catalyst were established. The results showed that the activity and stability of catalyst decreased with increasing the activation temperature of catalysts. The reaction rate constant (k) and the deactivation rate constant (kd) of catalyst in kinetic models were also estimated through the optimization method, respectively. The acidity of catalyst was characterized by ammonia (NH3)-temperature programmed desorption (TPD), and the desorption kinetics of NH3was obtained. The characterization results showed that the acid amount or the acid density gradually decreased, while the desorption activation energy or the acid strength increased, as the activation temperature of catalyst increased. In addition, the relationships between the acidity and catalytic performance of catalysts were correlated. It was found that the catalyst with higher acid amount and the lower acid strength on the surface exhibited the better catalytic performance and stability.

Designing of In Situ FTIR Cell and its Application

2014 ◽  
Vol 900 ◽  
pp. 390-393
Author(s):  
Ming Jian Luo ◽  
Bing Hu ◽  
Xin Yue Liu
Keyword(s):  
Acid Sites ◽  
Acid Strength ◽  
Ftir Spectra ◽  
Pyridine Adsorption ◽  
In Situ Ftir ◽  
Acid Amount ◽  
Ftir Study ◽  
Easy Operation ◽  
Mcm 41

An easy-operation in-situ FTIR cell is designed and used for the investigation of dehydroxylation and pyridine adsorption FTIR study. The dehydroxylation FTIR spectra of MCM-41 indicate that the isolated, geminal, and oxygen perturbed silanol vibrated at about 3745, 3735 and 3520 cm-1, respectively. Py-FTIR spectra indicate that MCM-41 has none Lewis and Brönsted acid sites while the acid amount and acid strength of AlMCM-41 increase with the decrease of Si/Al.

Relationship Between1H Chemical Shifts of Deuterated Pyridinium Ions and Brønsted Acid Strength of Solid Acids

2007 ◽  
Vol 111 (12) ◽  
pp. 3085-3089 ◽  
Author(s):  
Anmin Zheng ◽  
Hailu Zhang ◽  
Lei Chen ◽  
Yong Yue ◽  
Chaohui Ye ◽  
...  
Keyword(s):  
Chemical Shifts ◽  
Solid Acids ◽  
Acid Strength ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Brönsted Acid ◽  
Pyridinium Ions

Consequences of Acid Strength for Isomerization and Elimination Catalysis on Solid Acids

2009 ◽  
Vol 131 (18) ◽  
pp. 6554-6565 ◽  
Author(s):  
Josef Macht ◽  
Robert T. Carr ◽  
Enrique Iglesia
Keyword(s):  
Solid Acids ◽  
Acid Strength

Adjusting the Acid Strength of Hybrid Solid Acids in Confined Nanospace

2016 ◽  
Vol 59 (19-20) ◽  
pp. 1748-1756 ◽  
Author(s):  
Xiaomin Zhang ◽  
Bing Xiao ◽  
Jingjing Chen ◽  
Miao Guo ◽  
Qihua Yang
Keyword(s):  
Solid Acids ◽  
Acid Strength
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