Catalytic hydrolysis of sodium borohydride in an auto-thermal fixed-bed reactor

2006 ◽  
Vol 31 (7) ◽  
pp. 961-965 ◽  
Author(s):  
Q ZHANG ◽  
G SMITH ◽  
Y WU ◽  
R MOHRING
Keyword(s):  
Sodium Borohydride ◽  
Fixed Bed ◽  
Fixed Bed Reactor ◽  
Catalytic Hydrolysis ◽  
Hydrolysis Of

Thermodynamics Study on Catalytic Hydrolysis of CCl2F2 over Solid Acid MoO3/ZrO2

2013 ◽  
Vol 726-731 ◽  
pp. 535-538
Author(s):  
Tian Cheng Liu ◽  
Yu Jiao Guo ◽  
Ping Ning ◽  
Guang Yang Tang ◽  
Ming Long Yuan
Keyword(s):  
Water Vapor ◽  
Solid Acid ◽  
Exothermic Reaction ◽  
Fixed Bed ◽  
Fixed Bed Reactor ◽  
Catalytic Hydrolysis ◽  
Chemical Adsorption ◽  
Freundlich Model ◽  
Hydrolysis Of

Catalytic hydrolysis decomposition of dichlorodifluoromethane (CCl2F2) in the presence of water vapor and oxygen was studied over solid acid MoO3/ZrO2 using a fixed-bed reactor. The CCl2F2 adsorption was multilayer chemical adsorption and its process was corresponding with Freundlich model. Its heat was from 56.3 to 73.2 KJ.mol-1, and it was exothermic reaction and chemical adsorption.

Kinetics Study on Catalytic Hydrolysis of CCl2F2 over Solid Acid MoO3/ZrO2

2013 ◽  
Vol 750-752 ◽  
pp. 1283-1286
Author(s):  
Tian Cheng Liu ◽  
Yu Jiao Guo ◽  
Ping Ning ◽  
Si Ping Ji ◽  
Bin Li ◽  
...  
Keyword(s):  
Water Vapor ◽  
Solid Acid ◽  
Arrhenius Equation ◽  
Fixed Bed ◽  
Fixed Bed Reactor ◽  
Kinetics Study ◽  
Catalytic Hydrolysis ◽  
Reaction Energy ◽  
Velocity Equation ◽  
Hydrolysis Of

Catalytic hydrolysis decomposition of dichlorodifluoromethane (CCl2F2) in the presence of water vapor and oxygen was studied over solid acid MoO3/ZrO2 using a fixed-bed reactor. The adsorption velocity equation was calculated by Bangham Equation. Reaction energy was determined by Arrhenius Equation and it was 123.12 KJ.mol-1.

Catalytic Hydrolysis of CCl2F2 over Solid Base CaO/ZrO2

2013 ◽  
Vol 652-654 ◽  
pp. 1533-1538
Author(s):  
Tian Cheng Liu ◽  
Ping Ning ◽  
Hong Bin Wang ◽  
Jun Ming Guo
Keyword(s):  
Water Vapor ◽  
Fixed Bed ◽  
Catalyst Preparation ◽  
Fixed Bed Reactor ◽  
Solid Base ◽  
Catalytic Hydrolysis ◽  
High Concentration ◽  
Zro2 Content ◽  
Preparation Conditions ◽  
Hydrolysis Of

Catalytic hydrolysis decomposition of dichlorodifluoromethane (CCl2F2) in the presence of water vapor and oxygen was studied over a series of solid base that have different ZrO2 content using a fixed-bed reactor. CO2 and CClF3 were the main-products and no CO was detected as by-product. The decomposition activity depended on the calcination temperature and the Zr:Ca. Calcined at 650 °C and Zr:Ca=1:0.35 were the best catalyst preparation conditions. Adopting low concentration of oxygen and CCl2F2 and high concentration of water vapor is preferable to the achievement of high conversion of CCl2F2 and selectivity for CO2. The catalytic activity of CaO/ZrO2 remained steady for 20 h on stream.

Hydrogen generation by both acidic and catalytic hydrolysis of sodium borohydride

2018 ◽  
Vol 5 (1) ◽  
pp. 41-48 ◽  
Author(s):  
Olga V. Netskina ◽  
Tihon N. Filippov ◽  
Oksana V. Komova ◽  
Valentina I. Simagina
Keyword(s):  
Hydrogen Evolution ◽  
Sodium Borohydride ◽  
Hydrogen Generation ◽  
Hydrogen Release ◽  
Catalytic Hydrolysis ◽  
Hydrogen Storage Materials ◽  
Acidic Solutions ◽  
High Concentrations ◽  
Sulfuric And Hydrochloric Acids ◽  
Hydrolysis Of

Abstract Sodium borohydride tablets have been employed as hydrogen-storage materials. Hydrogen release was performed by acidic hydrolysis where solutions of sulfuric and hydrochloric acids were added to the tablets, and by catalytic hydrolysis where water was added tablets of solid-state NaBH4/Co composite. In acidic solutions hydrogen evolution occurred instantaneously, and at high concentrations of acids the releasing hydrogen contained an admixture of diborane. Hydrogen evolution from the solidstate NaBH4/Co composite proceeded at a uniform rate of 13.8±0.1 cm3·min-1, water vapor being the only impurity in the evolving gas.

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