Adsorption Behaviors of l-Histidine and dl-Tryptophan on Cholesterol, Silica, Alumina, and Graphite

2001 ◽  
Vol 239 (1) ◽  
pp. 20-26 ◽  
Author(s):  
Debashish Palit ◽  
Satya Priya Moulik
Keyword(s):  
Adsorption Behaviors ◽  
Silica Alumina

Single and Binary Mixture Adsorption Behaviors of C6–C8Hydrocarbons on Silica–Alumina Gel

2018 ◽  
Vol 57 (48) ◽  
pp. 16451-16463 ◽  
Author(s):  
Frederik Berg ◽  
Karina Gohlke ◽  
Christoph Pasel ◽  
Michael Luckas ◽  
Tobias Eckardt ◽  
...  
Keyword(s):  
Binary Mixture ◽  
Adsorption Behaviors ◽  
Mixture Adsorption ◽  
Alumina Gel ◽  
Silica Alumina

Fluidized Catalytic Cracking Catalyst Microstructure as Determined by A Scanning Ion Microprobe

1990 ◽  
Vol 48 (2) ◽  
pp. 302-303
Author(s):  
J.K. Lampert ◽  
G.S. Koermer ◽  
J.M. Macaoy ◽  
J.M. Chabala ◽  
R. Levi-Setti
Keyword(s):  
Catalytic Cracking ◽  
Secondary Ion Mass Spectrometry ◽  
Fuel Oil ◽  
Ion Microprobe ◽  
Fluidized Catalytic Cracking ◽  
Ion Probe ◽  
Silica Alumina ◽  
Resolution Imaging ◽  
The University ◽  
High Spatial Resolution Imaging

We have used high spatial resolution imaging secondary ion mass spectrometry (SIMS) to differentiate mineralogical phases and to investigate chemical segregations in fluidized catalytic cracking (FCC) catalyst particles. The oil industry relies on heterogeneous catalysis using these catalysts to convert heavy hydrocarbon fractions into high quality gasoline and fuel oil components. Catalyst performance is strongly influenced by catalyst microstructure and composition, with different chemical reactions occurring at specific types of sites within the particle. The zeolitic portions of the particle, where the majority of the oil conversion occurs, can be clearly distinguished from the surrounding silica-alumina matrix in analytical SIMS images.The University of Chicago scanning ion microprobe (SIM) employed in this study has been described previously. For these analyses, the instrument was operated with a 40 keV, 10 pA Ga+ primary ion probe focused to a 30 nm FWHM spot. Elemental SIMS maps were obtained from 10×10 μm2 areas in times not exceeding 524s.

Solubility and adsorption behaviors of chlorophenols in the presence of surfactant

1997 ◽  
Vol 35 (7) ◽  
pp. 123-130 ◽  
Author(s):  
J. C. Liu ◽  
P. S. Chang
Keyword(s):  
Sodium Dodecyl Sulfate ◽  
Critical Micelle Concentration ◽  
Sodium Dodecyl ◽  
Adsorption Behaviors ◽  
Brij 35 ◽  
Important Index ◽  
Dodecyl Sulfate ◽  
Triton X

The solubility of chlorophenols as affected by surfactant was investigated. Three kinds of surfactant, sodium dodecyl sulfate, Triton X-100, and Brij 35, were utilized. The solubilization of chlorophenols by surfactant follows the order of 2,4,6-trichlorophenol > 2,4-dichlorophenol > 2,6-dichlorophenol > 2-chlorophenol; and the critical micelle concentration is an important index. The adsorption reactions of 2,4-dichlorophenol and 2,4,6- trichlorophenol onto hydrous montmorillonite in the presence of surfactant were examined. The presence of surfactant decreased the adsorption of chlorophenols significantly. The roles of hydrophobicity of chlorophenols in solubilization and adsorption behaviors are discussed.

scholarly journals Influence of Morphology of Silica-Alumina Composites on Their Activity for Hydrolytic Dehydrogenation of Ammonia Borane

2016 ◽  
Vol 95 (6) ◽  
pp. 480-486 ◽  
Author(s):  
Naoki TOYAMA ◽  
Shinobu OHKI ◽  
Masataka TANSHO ◽  
Tadashi SHIMIZU ◽  
Tetsuo UMEGAKI ◽  
...  
Keyword(s):  
Ammonia Borane ◽  
Silica Alumina ◽  
Alumina Composites

Adsorption behaviors of paper mill sludge biochar to remove Cu, Zn and As in wastewater

2021 ◽  
pp. 101616
Author(s):  
Zhiyong Xu ◽  
Yunqin Lin ◽  
Yuejin Lin ◽  
De Yang ◽  
Haomin Zheng
Keyword(s):  
Paper Mill ◽  
Paper Mill Sludge ◽  
Adsorption Behaviors

Sensitive silica‐alumina modified capacitive non‐faradaic glucose sensor for gestational diabetes

2021 ◽  
Author(s):  
Lizhen Chen ◽  
Wenyang Xie ◽  
Yao Luo ◽  
Xiaolan Ding ◽  
Bing Fu ◽  
...  
Keyword(s):  
Gestational Diabetes ◽  
Glucose Sensor ◽  
Silica Alumina

Evaluation of U(VI) adsorption from Ca2+ coexisted bicarbonate solution by synthetic inorganic and mineral materials

2020 ◽  
Vol 108 (12) ◽  
pp. 955-965
Author(s):  
Jun Liu ◽  
Shilong Shi ◽  
XiaoYu Yin ◽  
Yong Jin ◽  
Chunhai Lu ◽  
...  
Keyword(s):  
Manganese Dioxide ◽  
Structural Stability ◽  
Adsorption Process ◽  
Natural Uranium ◽  
Chemical Adsorption ◽  
Surface Chemical ◽  
Weakly Alkaline ◽  
Adsorption Behaviors ◽  
Study Results ◽  
Kinetics And Isotherms

AbstractPart weakly alkaline natural uranium-containing water contains abundant Ca2+ and (bi)carbonate. Herein, two kinds of materials, namely mesoporous hydrous manganese dioxide (MHMO) and polyacrylonitrile (PAN)/dolomite composites were synthesized and characterized to evaluate their adsorption behaviors of U(VI) from Ca2+ coexisted bicarbonate solution. Characterization results showed that both samples exhibited good structural stability after U(VI) load. MHMO could coordinate U(VI) through the surface –OH sites, whereas an unfavorable U(VI) adsorption onto mineral composites was deduced. Adsorption tests indicated that increasing Ca2+ and (bi)carbonate amounts suppress U(VI) adsorption process, and ∼19.0 mg/g U adsorbed by MHMO could be obtained in solutions with 1 mmol/L [Ca2+], 5 mmol/L [CO3]T, 50 mg/L [U(VI)]initial at pH 8.0. Moreover, a heterogeneous surface chemical adsorption was verified through kinetics and isotherms study. Results from our study should be useful in exploring the adsorption behaviors and mechanisms of U(VI) on selected inorganic and mineral materials from natural uranium-containing water.

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