Preparation of highly dispersed niobium oxide on silica by equilibrium adsorption method

Abstract The enthalpy of isopropanol adsorption on ZSM-5 (Zeolite Socony Mobil Framework Type MFI) was determined by the static adsorption method at the temperature range from 20°C to 100°C. Langmuir and Huttig models of equilibrium adsorption have been used to calculate the enthalpy of isopropanol adsorption at these conditions. Adsorption isotherms determined by the flow method at 20°C and 30°C have been also used in the calculations. The obtained values of isopropanol adsorption enthalpy were compared with the values of isopropanol evaporation enthalpy and with the results obtained from isopropanol and water desorption measurements with thermogravimetry and differential scanning calorimetry methods.

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XAFS study of niobium species formed during the preparation of Nb/SiO2 catalysts by the equilibrium adsorption method

Physica B Condensed Matter ◽

10.1016/0921-4526(94)00787-v ◽

1995 ◽

Vol 208-209 ◽

pp. 681-682 ◽

Cited By ~ 1

Author(s):

Hisao Yoshida ◽

Tsunehiro Tanaka ◽

Tomoko Yoshida ◽

Takuzo Funabiki ◽

Satohiro Yoshida

Keyword(s):

Equilibrium Adsorption ◽

Adsorption Method

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Physicochemical properties of MoO3TiO2 prepared by an equilibrium adsorption method

Journal of Catalysis ◽

10.1016/0021-9517(89)90273-x ◽

1989 ◽

Vol 120 (2) ◽

pp. 325-336 ◽

Cited By ~ 65

Author(s):

Du Soung Kim ◽

Yasuhiko Kurusu ◽

Israel E. Wachs ◽

Franklin D. Hardcastle ◽

Kohichi Segawa

Keyword(s):

Physicochemical Properties ◽

Equilibrium Adsorption ◽

Adsorption Method

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Synthesis of very highly dispersed platinum catalysts supported on carbon xerogels by the strong electrostatic adsorption method

Journal of Catalysis ◽

10.1016/j.jcat.2008.10.014 ◽

2009 ◽

Vol 261 (1) ◽

pp. 23-33 ◽

Cited By ~ 97

Author(s):

S LAMBERT ◽

N JOB ◽

L DSOUZA ◽

M PEREIRA ◽

R PIRARD ◽

...

Keyword(s):

Platinum Catalysts ◽

Adsorption Method ◽

Electrostatic Adsorption ◽

Strong Electrostatic Adsorption ◽

Carbon Xerogels ◽

Highly Dispersed

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Synthesis of hybrid materials, immobilization of lipase in SBA-15 modified with CaO

Journal of Applied Research and Technology ◽

10.22201/icat.16656423.2018.16.6.747 ◽

2018 ◽

Vol 16 (6) ◽

Cited By ~ 1

Author(s):

J. C. Méndez ◽

U. Arellano ◽

S. Solís ◽

M. Asomoza ◽

V. H. Lara ◽

...

Keyword(s):

Mesoporous Silica ◽

Candida Rugosa ◽

Specific Area ◽

Candida Rugosa Lipase ◽

Adsorption Model ◽

Adsorption Method ◽

Silica Materials ◽

Highly Dispersed ◽

Mesoporous Silica Materials ◽

Accessible Surface

Mesoporous silica materials (SBA-15) doped with calcium (Ca) at 1, 3 and 5% w/w were synthesized in order to immobilize candida rugosa lipase (CRL), through the adsorption method. It was found that calcium (Ca) is present as CaO, highly dispersed on the surface of SBA-15, the specific area of SBA-15 decreases on incrementing CaO content. The environmental pH influences the adsorption of CRL due to the polarization of positive charges below the isoelectric point (IEP) whereas the Ca-SBA-15 materials present negative charges. The adsorption model proposed for CRL is about the accessible surface of the material, as this has a size of 7 nm and the Ca-SBA-15 present pores at an interval of 3 nm.

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Effects of Urea on Adsorption of Metsulfuron-Methyl by Three Kinds of Minerals

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.295-298.54 ◽

2013 ◽

Vol 295-298 ◽

pp. 54-61

Author(s):

Fa Bing Ye ◽

Chun Bao Huang ◽

Xu Jie Xiong ◽

Yuan Yan Dong

Keyword(s):

Langmuir Equation ◽

Equilibrium Adsorption ◽

Adsorption System ◽

Adsorption Method ◽

Metsulfuron Methyl ◽

Amorphous Alumina ◽

Adsorption Quantity

Adsorption of metsulfuron-methyl by kaolinite, goethite，amorphous alumina and the effects of urea on the adsorption were examined with equilibrium adsorption method. Results indicated that the adsorption was in accordance with Langmuir equation, with the maximum absorbing capacities ranking as amorphous alumina (2150 g•g-1), goethite (729.4 g•g-1), kaolinite (529.1g•g-1). When urea was used in the adsorption system, the absorbing capacities of goethite and amorphous alumina to metsulfuron-methyl decreased whatever the addition order of urea and metsulfuron-methyl was. However, when urea was added before or simultaneously with metsulfuron-methyl in suspension of kaolinite, the adsorption quantity of metsulfuron-methyl was increased．

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