Characterization and Application Process Optimization of CuO/γ-Al2O3 Catalyst in CWAO Technology

2014 ◽  
Vol 1008-1009 ◽  
pp. 338-341
Author(s):  
Yu Xiu Zhang ◽  
Cheng Zhi Wang ◽  
Yong Li Zhang ◽  
Zhang Wei Li
Keyword(s):  
Reaction Time ◽  
Oxygen Partial Pressure ◽  
Partial Pressure ◽  
Reaction Temperature ◽  
Removal Rate ◽  
Influence Factors ◽  
Carrier Distribution ◽  
Influent Water ◽  
Catalyst Dosage ◽  
Stirring Intensity

CuO/γ-Al2O3 catalyst was used to deal with the waste leachate in CWAO technology of, and the SEM and TEM characterization showed: active component in the surface of the carrier distribution is uniform; In CWAO process, six factors, based on the CODCr removal rate and turbidity removal rate, the biggest impact factor is reaction temperature, and the influence factors of the top three were reaction temperature, catalyst dosage and reaction time. The influence factors of those in the bottom three are influent water pH, oxygen partial pressure, stirring intensity, and three factors of influence on the strength is close. Optimizing operation process, in order: reaction temperature of 200 °C, catalyst dosage of 1.5 g, oxygen partial pressure of 2.0 MPa, stirring intensity 800 rpm, influent water pH of 7.0, the reaction time of 70 min.

KBrO3 Catalyzed Wet Air Oxidation of C.I. Reactive Brilliant Red K-2G

2012 ◽  
Vol 512-515 ◽  
pp. 2283-2286
Author(s):  
Xue Wei Dong
Keyword(s):  
Oxygen Partial Pressure ◽  
Partial Pressure ◽  
Reaction Temperature ◽  
Azo Dye ◽  
Removal Rate ◽  
Catalytic Wet Air Oxidation ◽  
Optimal Conditions ◽  
Air Oxidation ◽  
Wet Air Oxidation ◽  
Catalyst Dosage

The effect of KBrO3 on catalytic wet air oxidation to be used in azo dye C.I. Reactive Brilliant Red K-2G decolorization under different conditions is evaluated. The reaction temperature, oxygen partial pressure, pH and catalyst dosage were studied. The optimal conditions of applying KBrO3/O2 system were: reaction temperature 150°C, oxygen partial preSubscript textssure 1.0 Mpa, pH 4 and Reactive Brilliant Red K-2G: KBrO3 (mole ratio) 1:0.5. Under the optimal conditions, the color removal rate was 98.9%. KBrO3/O2 system was efficient in azo dye Reactive Brilliant Red K-2G decolorrization.

Oxidative Desulfurization Performance Optimization of Tert-Amyl Hydroperoxide

2014 ◽  
Vol 686 ◽  
pp. 66-72
Author(s):  
Ning Bo Huo ◽  
Zhi Gang Liu
Keyword(s):  
Reaction Time ◽  
Reaction Temperature ◽  
Performance Optimization ◽  
Removal Rate ◽  
Influence Factors ◽  
Oxidative Desulfurization ◽  
Oxidative Reaction ◽  
Catalyst Amount ◽  
Reaction Condition ◽  
Model Oil

The desulphurization experiment of oil-soluble oxidant tert-amyl hydroperoxide with dibenzothiophene dissolved in decalin as model-oil was researched. Characterisation on oxidation product was made, and dibenzothiophene removal rate was computed. The influence factors of the oxidative reaction regent amount and the condtions of reaction temperature and reaction time were optimized and compared. The best reaction condition was reaction temperature 90°C, reaction time 3 h, ratio of oxygen to sulfur 4:1, catalyst amount 0.12 g. Dibenzothiophene removal rate reached 97% in this reaction condition.

Research of Catalytic Oxidation Synthesis of Cyclopentene to Glutaraldehyde

2011 ◽  
Vol 391-392 ◽  
pp. 1149-1152
Author(s):  
Qi Dong Yan ◽  
Jun Xu ◽  
Feng Xu
Keyword(s):  
Reaction Time ◽  
Catalytic Oxidation ◽  
Reaction Temperature ◽  
Influence Factors ◽  
Synthesis Process ◽  
Mass Ratio ◽  
Tertiary Butanol ◽  
Catalyst Dosage ◽  
Main Influence ◽  
Oxidation Synthesis

The paper has studied the process of using H2O2 as oxidant and tungsten acid as catalyst, catalytic oxidation synthesis process of cyclopentene to glutaraldehyde and explored the main influence factors of the reaction, including the reaction time, reaction temperature, catalyst dosage and solvent. Furthermore, the quantitative analysis and qualitative analysis of the product was characterized by gas chromatography. The optimum synthetic condition was as follows: tertiary butanol as solvent, tungsten acid: boron anhydride(mass ratio)=1:1, 30%H2O2 as oxidant, the reaction temperature 35°C, the reaction time 4h, the yield of glutaraldehyde yield was 46%.

Study on the Hydrolysis of PET Catalyzed by Carbonates under Microwave Irradiation

2014 ◽  
Vol 1078 ◽  
pp. 36-39
Author(s):  
Zhi De Liu ◽  
Xin Zhang ◽  
Mi Mi Wang ◽  
Dong Zhang
Keyword(s):  
Reaction Time ◽  
Reaction Temperature ◽  
Influence Factors ◽  
Experimental Conditions ◽  
Zinc Carbonate ◽  
Hydrolytic Reaction ◽  
Microwave Hydrolysis ◽  
Catalyst Dosage ◽  
Hydrolysis Of ◽  
Temperature Time

A study for optimizing the experimental conditions for the hydrolysis of polyethylene terephthalate (PET) catalyzed by carbonates was performed. The main influence factors of PET microwave hydrolytic reaction, such as the reaction temperature, time and catalyst dosage, were confirmed and these effects on the catalysis of PET microwave hydrolysis were studied in detail. The results showed that the sequence of influence factors was reaction temperature>reaction time> catalyst dosage. The optimal experimental conditions under the catalyst of basic zinc carbonate were that the catalyst dosage, 0.75%; the reaction time, 210 min; the reaction temperature, 200°C.

Influence Factors of Denitration Study on Catalyst Mn-Ce/TiO2

2013 ◽  
Vol 634-638 ◽  
pp. 526-530
Author(s):  
Chun Xiang Geng ◽  
Qian Qian Chai ◽  
Wei Yao ◽  
Chen Long Wang
Keyword(s):  
Reaction Temperature ◽  
Catalytic Reduction ◽  
Removal Rate ◽  
Load Capacity ◽  
Fixed Bed ◽  
Influence Factors ◽  
Space Velocity ◽  
Molar Ratio ◽  
Impregnation Method ◽  
Ammonia Gas

Selective Catalytic Reduction (SCR) processes have been one of the most widely used denitration methods at present and the property of low tempreture catalyst becomes a hot research. The Mn-Ce/TiO2 catalyst was prepared by incipient impregnation method. The influence of load capacity, reaction temperature, O2 content, etc. on denitration were studied by a fixed bed catalyst reactor with ammonia gas. Results showed that catalyst with load capacity 18% performed high NO removal rate of 90% at conditions of reaction temperature 160°C, low space velocity, NH3/NO molar ratio 1: 1, O2 concentration 6%.

Research of Preparation Factors on Magnetic Cassava Starch Microspheres

2013 ◽  
Vol 634-638 ◽  
pp. 1513-1517
Author(s):  
Ping Lan ◽  
Yu Xian Feng ◽  
A Ming Chen ◽  
Lei Lei Qiao ◽  
Li Hong Lan ◽  
...  
Keyword(s):  
Reaction Time ◽  
Reaction Temperature ◽  
Influence Factors ◽  
Cassava Starch ◽  
Raw Material ◽  
Speed Ratio ◽  
Optimal Conditions

Magnetic cassava starch microspheres have been prepared by means of the method of precipitation magnetization, cassava starch as raw material adsorbing or embedding Fe3O4, many influence factors on magnetic cassava starch iron rate such as pH, reaction time, stirring speed, ratio of Fe+3 to Fe+2, reaction temperature also investigated in this paper. On the base above research, we preliminary got the optimal conditions on the synthesis of magnetic cassava starch microspheres.

Reactive Adsorption Desulfurization of Thiophene in n-hexane over Oxides Adsorbent of NiO-ZnO/Al2O3-SiO2

2013 ◽  
Vol 455 ◽  
pp. 43-47 ◽  
Author(s):  
Xiao Ming Hou ◽  
Ben Xian Shen ◽  
Ji Gang Zhao
Keyword(s):  
Reaction Time ◽  
Structural Properties ◽  
Reaction Temperature ◽  
Chemical Process ◽  
Removal Rate ◽  
Precipitation Method ◽  
Initial Concentration ◽  
Reactive Adsorption ◽  
Adsorption Desulfurization ◽  
Co Precipitation

The oxides adsorbent of NiO-ZnO/-Al2O3-SiO2 was prepared by co-precipitation method. SEM, XRD and BET studies were performed to understand the structural properties of the adsorbent. And the adsorbent can be used for the desulfurization of thiophene in n-hexane as model gasoline. Removal rate of thiophene increased with increasing reaction time. Removal rate of thiophene in equilibrium decreases with increasing the initial concentration of thiophene. The extent of adsorption in adsorbent increased with increasing the initial concentration of thiophene. The removal rate of thiophene increases with increasing reaction temperature, it showed that the desulfurization is a chemical process not a physical process.

Removal of Manganese(II) Ions from Wastewater by H2O2 as Oxidant

2014 ◽  
Vol 884-885 ◽  
pp. 125-128
Author(s):  
Wen Qiang Yang ◽  
Juan An ◽  
Jian Guo Yin ◽  
Xiao Li Yuan ◽  
Wen Tang Xia
Keyword(s):  
Hydrogen Peroxide ◽  
Reaction Time ◽  
Calcium Oxide ◽  
Reaction Temperature ◽  
Removal Rate ◽  
Treated Wastewater ◽  
Manganese Removal

Removal of manganese (II) ions from wastewater by H2O2as oxidant was studied. Effects of reaction temperature, hydrogen peroxide concentration, reaction time and calcium oxide concen-tration on the manganese removal were investigated. The results indicated that the removal rate of manganese exceeded 99.9% and the Mn (II) ions concentration of treated wastewater was lower than 0.1 mg·L-1under the conditions of reaction temperature 55 °C, concentration of H2O20.1 mL·L-1, reaction time 70 min, concentration of CaO 0.25 g·L-1.

Synthesis and Characterization of a Flame Retardant Dimethyl Methyl Phosphonate (DMMP) and its Application in FRP

2013 ◽  
Vol 804 ◽  
pp. 29-35
Author(s):  
Zhu Wang ◽  
Shan Jun Gao ◽  
Xu Xin Che ◽  
Chun Hui Shen
Keyword(s):  
Mechanical Properties ◽  
Reaction Time ◽  
Reaction Temperature ◽  
Flame Retardancy ◽  
Normal Pressure ◽  
Stability Control ◽  
Limiting Oxygen Index ◽  
Frp Composites ◽  
Preparation Conditions ◽  
Catalyst Dosage

Dimethyl Methyl Phosphonate (DMMP) was synthesized via the MichaelisArbuzov rearrangement in the normal pressure and N2atmosphere using a novel and can be used repeatedly catalyst. The preparation conditions of DMMP, such as the reaction time, reaction temperature and catalyst dosage were investigated. The FTIR (Fourier transform infrared spectroscopy), NMR (Nuclear magnetic resonance) , and TG-DSC(Thermogravimetric-Dynamic stability control system) results show that the obtained product is DMMP. When the reaction temperature is higher than 180°C, catalyst dosage is 12 wt%, and the reaction time is about 13 h, the highest yield (78 wt%) of DMMP can be obtained. Then DMMP was added to a FRP (Fiber Reinforced Plastics) matrix. The flame retardancy and mechanical properties of the DMMP/ FRP were tested for Limiting Oxygen Index (LOI), breaking elongation, impact toughness, tensile, and flexural strengths. A significant improvement of flame retardancy of the system was observed (increase of LOI up to 30.4) with an addition of 10 wt% DMMP to FRP. But when the DMMP content in the DMMP/ FRP composites is more than 10 wt%, the comprehensive mechanical properties of FRP will appear to decline and the LOI value has not changed, so we conclude that DMMP content in the DMMP/ FRP composites is 10wt%.

Research of Synthesizing Biodiesel from Suaeda Salsa by Ultrasonic-Assisted Transesterification

2011 ◽  
Vol 189-193 ◽  
pp. 3925-3931 ◽  
Author(s):  
Qing Li Yang ◽  
Feng Zhu ◽  
Jie Sun ◽  
Song Qin
Keyword(s):  
Reaction Time ◽  
Production Rate ◽  
Reaction Temperature ◽  
Biodiesel Production ◽  
Suaeda Salsa ◽  
Ultrasonic Frequency ◽  
Ultrasonic Power ◽  
Technological Parameters ◽  
Ultrasonic Assisted ◽  
Catalyst Dosage

Suaeda salsa oil was taken as raw materials to produce biodiesel by ultrasonic-Assisted transesterification. Single factor experiment and the orthogonal experiment combination design were adopted to study the effects of ultrasonic frequency, ultrasonic power，reaction temperature ，reaction time，catalyst dosage and mole ratio of methanol to oil on biodiesel production rate. The order of factors that influence the biodiesel production rate within the experimental range was as follows: catalyst dosage＞reaction time＞reaction temperature＞mole ratio of methanol to oil. The optimal technological parameters should be as follows: ultrasonic frequency 28kHz, ultrasonic power 210W, reaction temperature 65 , reaction time 10min,catalyst dosage 0.3%and mole ratio of methanol to oil 6, and biodiesel production rate is 97.93% under such conditions.

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