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.

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.

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.

scholarly journals Catalytic hydrolysis of Dichlorodifluoromethane over MoO3/ZrO2 -TiO2 solid acid

2020 ◽  
Author(s):  
Zhiqian Li ◽  
Tong Zhou ◽  
Guoqing Ren ◽  
Xiaofang Tan ◽  
Lijuan Jia ◽  
...  
Keyword(s):  
Water Vapor ◽  
Degradation Rate ◽  
Solid Acid ◽  
Degradation Products ◽  
Vapor Concentration ◽  
Water Vapor Concentration ◽  
Catalytic Hydrolysis ◽  
Hydrolysis Temperature ◽  
Continuous Reaction ◽  
Hydrolysis Of

Abstract The catalytic behaviors of solid acid of MoO3/ZrO2-TiO2 calcined at different temperature for the catalytic hydrolysis of Dichlorodifluoromethane have been studided. The effects of catalytic hydrolysis temperature and water vapor concentration on catalytic hydrolysis of Dichloro difluoromethane were also studied. The Results show 98.65 % of Dichlorodifluoromethane is degraded over MoO3/ZrO2-TiO2 catalyst calcined at 500 ℃ with a concentration of water vapor of 83.18% when the hydrolysis temperature is 350 ℃ and the Dichlorodifluoromethane flux rate is 1 mL/min with main degradation products were CO, CO2, HF and HCl. A maintained degradation rate of 65.34% of Difluoromethylene Chloride has been observed through 30 hours’ continuous reaction over the catalyst of MoO3/ZrO2-TiO2. The XRD result reveals the main phase of solid MoO3/ZrO2-TiO2 catalyst is the tetragonal Zr (MoO4)2 that dopedTiO2 of anatase.

scholarly journals Catalytic hydrolysis of CFC-12 over MoO3/ZrO2 -TiO2 solid acid

2020 ◽  
Author(s):  
Zhiqian Li ◽  
Tong Zhou ◽  
Guoqing Ren ◽  
Xiaofang Tan ◽  
Lijuan Jia ◽  
...  
Keyword(s):  
Water Vapor ◽  
Solid Acid ◽  
Hydrolysis Rate ◽  
Vapor Concentration ◽  
Water Vapor Concentration ◽  
Catalytic Hydrolysis ◽  
Hydrolysis Products ◽  
Hydrolysis Temperature ◽  
Continuous Reaction ◽  
Hydrolysis Of

Abstract The catalytic hydrolysis of Difluorodichloromethane(CFC-12) by solid acid of MoO3/ZrO2-TiO2 calcined at different temperature had been studied. The effects of catalytic hydrolysis temperature and water vapor concentration on catalytic hydrolysis of CFC-12were also studied. The results showed that catalytic hydrolysis rate of CFC-12 reached to 98.65% at 400 ℃ when the MoO3/ZrO2-TiO2 catalyst was calcined at 500 ℃ with a concentration of water vapor of 83.18%, and the main hydrolysis products were CO, CO2, HF and HCl. After 30 hours’ continuous reaction, the hydrolysis rate of CFC-12 was 65.34%. The XRD result reveals that the main phase of solid MoO3/ZrO2-TiO2 catalyst is the tetragonal Zr (MoO4)2 with doped TiO2 of anatase.

scholarly journals Catalytic hydrolysis of Dichlorodifluoromethane over MoO3/ZrO2 -TiO2 solid acid

2019 ◽  
Author(s):  
Zhiqian Li ◽  
Tong Zhou ◽  
Guoqing Ren ◽  
Xiaofang Tan ◽  
Lijuan Jia ◽  
...  
Keyword(s):  
Water Vapor ◽  
Degradation Rate ◽  
Solid Acid ◽  
Degradation Products ◽  
Vapor Concentration ◽  
Catalytic Hydrolysis ◽  
Tio2 Catalyst ◽  
Hydrolysis Temperature ◽  
Continuous Reaction ◽  
Hydrolysis Of

Abstract The catalytic behaviors of solid acid of MoO3/ZrO2-TiO2 calcined at different temperature for the catalytic hydrolysis of Dichlorodifluoromethane have been studided. The effects of catalytic hydrolysis temperature and water vapor concentration on catalytic hydrolysis of Dichlorodifluoromethane were also studied. The Results show 98.65 % of Dichlorodifluoromethane is degraded over MoO3/ZrO2-TiO2 catalyst calcined at 500 ℃ with a concentration of water vapor of 83.18% when the hydrolysis temperature is 400。C and the Dichlorodifluoromethane flux rate is 1mL/min with main degradation products were CO, CO2, HF and HCl. A maintained degradation rate of 65.34 % of Difluoromethylene Chloride has been observed through 30 hours’ continuous reaction over the catalyst of MoO3/ZrO2-TiO2. The XRD result reveals the main phase of solid MoO3/ZrO2-TiO2 catalyst is the tetragonal Zr(MoO4)2 that doped TiO2 of anatase.

scholarly journals Catalytic hydrolysis of Dichlorodifluoromethane over MoO3/ZrO2 -TiO2 solid acid

2020 ◽  
Author(s):  
Zhiqian Li ◽  
Tong Zhou ◽  
Guoqing Ren ◽  
Xiaofang Tan ◽  
Lijuan Jia ◽  
...  
Keyword(s):  
Water Vapor ◽  
Solid Acid ◽  
Hydrolysis Rate ◽  
Vapor Concentration ◽  
Water Vapor Concentration ◽  
Catalytic Hydrolysis ◽  
Hydrolysis Products ◽  
Hydrolysis Temperature ◽  
Continuous Reaction ◽  
Hydrolysis Of

Abstract The catalytic hydrolysis of Difluorodichloromethane(CFC-12) by solid acid of MoO3/ZrO2-TiO2 calcined at different temperature had been studied. The effects of catalytic hydrolysis temperature and water vapor concentration on catalytic hydrolysis of CFC-12were also studied. The results showed that catalytic hydrolysis rate of CFC-12 reached to 98.65 % at 400。C when the MoO3/ZrO2-TiO2 catalyst was calcined at 500℃ with a concentration of water vapor of 83.18% ,and the main hydrolysis products were CO, CO2, HF and HCl. After 30 hours’ continuous reaction, the hydrolysis rate of CFC-12 was 65.34%. The XRD result reveals that the main phase of solid MoO3/ZrO2-TiO2 catalyst is the tetragonal Zr(MoO4)2with dopedTiO2 of anatase.

scholarly journals Catalytic hydrolysis of Dichlorodifluoromethane over MoO3/ZrO2 -TiO2 solid acid

2020 ◽  
Author(s):  
Zhiqian Li ◽  
Tong Zhou ◽  
Guoqing Ren ◽  
Xiaofang Tan ◽  
Lijuan Jia ◽  
...  
Keyword(s):  
Water Vapor ◽  
Solid Acid ◽  
Hydrolysis Rate ◽  
Vapor Concentration ◽  
Water Vapor Concentration ◽  
Catalytic Hydrolysis ◽  
Hydrolysis Products ◽  
Hydrolysis Temperature ◽  
Continuous Reaction ◽  
Hydrolysis Of

Abstract The catalytic hydrolysis of Difluoro dichloromethane (CFC-12) by solid acid of MoO3/ZrO2-TiO2 calcined at different temperature had been studied. The effects of catalytic hydrolysis temperature and water vapor concentration on catalytic hydrolysis of CFC-12 were also studied. The results showed that catalytic hydrolysis rate of CFC-12 reached to 98.65 % at 400℃when the MoO3/ZrO2-TiO2 catalyst was calcined at 500℃ with a concentration of water vapor of 83.18%, and the main hydrolysis products were CO, CO2, HF and HCl. After 30 hours’ continuous reaction, the hydrolysis rate of CFC-12 was 65.34%. The XRD result reveals that the main phase of solid MoO3/ZrO2-TiO2 catalyst is the tetragonal Zr (MoO4)2with doped TiO2 of anatase.

Adsorption Thermodynamics Study on CCl2F2 over Solid Base Na2O/ZrO2

2013 ◽  
Vol 457-458 ◽  
pp. 112-115
Author(s):  
Tian Cheng Liu ◽  
Yu Jiao Guo ◽  
Guang Yang Tang ◽  
Ming Long Yuan ◽  
Ping Ning
Keyword(s):  
Water Vapor ◽  
Fixed Bed ◽  
Adsorption Heat ◽  
Fixed Bed Reactor ◽  
Solid Base ◽  
Adsorption Thermodynamics ◽  
Catalytic Hydrolysis ◽  
Chemical Adsorption ◽  
Freundlich Model

Catalytic hydrolysis decomposition of dichlorodifluoromethane (CCl2F2) in the presence of water vapor and oxygen was studied over solid base Na2O/ZrO2 using a fixed-bed reactor. The CCl2F2 adsorption was multilayer chemical adsorption and its process was corresponding with Freundlich model. Its adsorption heat was from 43.74 to 76.31 KJ.mol-1, and the CCl2F2 adsorption over solid base Na2O/ZrO2 was exothermic and chemical.

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