Characterization of coke precursor deposited on the surface of heteropoly acid catalyst in alkylation

2002 ◽  
Vol 74 (1-2) ◽  
pp. 45-51 ◽  
Author(s):  
Yigong He ◽  
Yufeng He
Keyword(s):  
Heteropoly Acid ◽  
Acid Catalyst

Synthesis and Structural Characterization of a Novel Composite Modified Starch

2011 ◽  
Vol 396-398 ◽  
pp. 1180-1183
Author(s):  
He Ping Li ◽  
Hu Qiang Lv ◽  
Yao Zhang ◽  
Yong Zhe Yang
Keyword(s):  
Structural Characterization ◽  
Orthogonal Experiment ◽  
Acid Catalyst ◽  
Chloroacetic Acid ◽  
Normal Pressure ◽  
Modified Starch ◽  
Optimum Conditions ◽  
X Ray Diffraction ◽  
Mass Fractions

In the normal pressure and presence of catalyst, a novel composite modified starch or functional surfactant was synthesized by using the cassava starch as the main feedstock through the alkalization, etherification and oxidation etc.. The degree of substitution was up to 1.21. Based on the orthogonal experiment and computer-aid methods, the optimum conditions were resulted as follows: the mass fractions(vs. dry starch) of chloroacetic acid, catalyst and oxidant were 32%, 0.01% and 1.14% respectively, and the reaction temperature of etherification was at 50°C for 4.1h. The structural characterization of the composite modified starch was determined by IR and X-ray diffraction.

scholarly journals Hydrogenation of Phenol to Cyclohexanone over Bifunctional Pd/C-Heteropoly Acid Catalyst in the Liquid Phase

2019 ◽  
Vol 149 (9) ◽  
pp. 2383-2389 ◽  
Author(s):  
Shiwei Liu ◽  
Jing Han ◽  
Qiong Wu ◽  
Bing Bian ◽  
Lu Li ◽  
...  
Keyword(s):  
Liquid Phase ◽  
Heteropoly Acid ◽  
Acid Catalyst

Characterization of Dispersed Heteropoly Acid on Mesoporous Zeolite Using Solid-State31P NMR Spin−Lattice Relaxation

2009 ◽  
Vol 131 (28) ◽  
pp. 9715-9721 ◽  
Author(s):  
Kake Zhu ◽  
Jianzhi Hu ◽  
Xiaoyan She ◽  
Jun Liu ◽  
Zimin Nie ◽  
...  
Keyword(s):  
Heteropoly Acid ◽  
Lattice Relaxation ◽  
Spin Lattice Relaxation ◽  
Mesoporous Zeolite ◽  
Spin Lattice

The Preparation and Characterization of the Solid Acid Catalyst for the Esterification of the Gutter Oil

2014 ◽  
Vol 881-883 ◽  
pp. 297-301 ◽  
Author(s):  
Yan Zhi Liu ◽  
Shun Ping Wang ◽  
Kun Yuan ◽  
Huian Tang
Keyword(s):  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Thermogravimetric Analysis ◽  
Active Carbon ◽  
Solid Acid ◽  
Solid Acid Catalyst ◽  
Acid Catalyst ◽  
Raw Material ◽  
Ft Ir

The solid acid catalyst (ACSA) for the gutter oil esterification to biodiesel was prepared via active carbon as raw material by introducing the-SO3H group onto the surface of it. The ACSA were characterized by Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA) and elemental analysis (EA), respectively. And the results showed that the-SO3H groups were successfully introduced onto the surface of the active carbon and the containing of the-SO3H groups are higher than 0.017g per gram of ACSA.

Characterization of Insoluble Monovalent K+, Tl+ and Ag+ Salts of 12-Tungstophosphoric Acid

2007 ◽  
Vol 555 ◽  
pp. 207-212 ◽  
Author(s):  
M.R. Todorović ◽  
I. Holclajtner-Antunović ◽  
U.B. Mioč ◽  
D. Bajuk-Bogdanović
Keyword(s):  
Thermal Analysis ◽  
Impedance Spectroscopy ◽  
Heteropoly Acid ◽  
Physicochemical Characterization ◽  
Tungstophosphoric Acid ◽  
Neutral Salt ◽  
Acid Salt

The K3PW12O40, K2.5H0.5PW12O40, K2HPW12O40, KH2PW12O40, Ag3PW12O40 and Tl3PW12O40 salts were synthesized and characterized by thermal analysis, IR and impedance spectroscopy, and SEM. The physicochemical characterization of acid alkaline salts revealed the presence of biphasic mixtures of unreacted heteropoly acid and its neutral salt. The unreacted heteroply acid could be washed away by treating the acid salt with water.

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