Shanghai Huaming Hi Technology Group Co.

Shanghai, China

Shanghai Huaming Hi Technology Group Co.

Shanghai, China
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Zhang Q.,East China University of Science and Technology | Li T.,East China University of Science and Technology | Kameyama H.,Tokyo University of Agriculture and Technology | Wu Q.,Shanghai Huaming Hi Technology Group Co. | And 2 more authors.
Catalysis Communications | Year: 2014

The catalytic combustion of propionic acid was chosen as a model reaction to investigate Pt structured catalysts. A novel competitive impregnation method was used to improve the condition of Pt distribution and decrease the Pt amount. The prepared catalysts were compared with those prepared by the co-impregnation method. Results showed that the competitive impregnation method was preferable. Catcom-0.06 with 0.06 wt.% Pt and 35.1% Pt dispersion was prepared by the competitive impregnation method, and this catalyst exhibited high activity and stability. The mechanism of the competitive impregnation method was also proposed. © 2014 Elsevier B.V. All rights reserved.


Zhang Z.-W.,East China University of Science and Technology | Chen J.-D.,East China University of Science and Technology | Wu Q.-F.,East China University of Science and Technology | Wu Q.-F.,Shanghai Huaming Hi Technology Group Co. | And 2 more authors.
Guocheng Gongcheng Xuebao/The Chinese Journal of Process Engineering | Year: 2010

The surface properties of micro fly ash fiber (FAF) were investigated in the corrosive media of water, H2SO4 solution, NaOH solution under the conditions of 100°C and 3 h. The changes of weight, specific surface area, micro-morphology, composition and structure of FAF before and after corrosion were examined, and composition of residual solution analyzed by ICP. The results showed that weight loss of FAF increased with the decrease of pH value in the corrosive medium, and that the pH of corrosive medium increased by the leached ions at the same time. The surface of FAF was etched in many small potholes and weight lost 12.9% under water corrosion. Its weight lost 4.6% under 0.25 mol/L of NaOH solution corrosion with surface etched to ravines and the surface Si-OH vibration absorption peak significantly declined, meanwhile Si and Al concentrations changed less and specific surface area increased from 0.129 to 5.486 m2/g. Whereas, FAF was broken and weight lost 18.9% with the Si, Al, Ca substantive leaching under 0.25 mol/L H2SO4 solution corrosion, with the FT-IR diagram showing the characteristic peaks of S042~. It shows that alkali metal ion leaching and network structure with Si component dissolving in the solution are the main corrosion mechanism.


Geng J.,East China University of Science and Technology | Geng J.,Shanghai Huaming Hi Technology Group Co. | Chen J.-D.,East China University of Science and Technology | Chen J.-D.,Shanghai Huaming Hi Technology Group Co. | And 2 more authors.
Guocheng Gongcheng Xuebao/The Chinese Journal of Process Engineering | Year: 2010

Quaternary ammonium type cationic starch with low degree of substitution was used to modify the surface of fly ash fibres (FAFs) which was pretreated by hydrochloric acid first. The optimization of acid pretreatment condition, and cationic modification and the effects of surface zeta potential on the dispersion of FAFs in water were examined. The results showed that the cationic FAFs with the maximum surface Zeta potential of 19.00 mV could be obtained under the conditions of 30 min pretreatment with 0.3 mol/L HCl and 40 min cationic modification with cationic starch at the water concentration of 0.06% in 40 min stirring time under normal temperature. SEM analysis showed good coating status of FAFs. The dispersion and settling experiments proved that the higher the surface Zeta potential was, the longer the settling time would be and the better the dispersion would turn, when Zeta potential increased to 17.20 mV, the anti-flocculation was improved obviously.


Yang F.,East China University of Science and Technology | Xuan S.-F.,Shanghai Huaming Hi Technology Group Co. | Ma X.-S.,East China University of Science and Technology
Guocheng Gongcheng Xuebao/The Chinese Journal of Process Engineering | Year: 2015

TiO2 nano-particles were immobilized on activated carbon honeycomb (ACH) by impregnation method to prepare ACH/TiO2 photocatalyst. Experiments on dynamic photocatalytic degradation of toluene gas under UV excitation wavelength of 387 nm in a self-made photocatalytic reactor were carried out. The results indicated that ACH/TiO2 had a good synergistic effect, which could increase the degradation of initial concentration of toluene from 160 to 830 mg/m3. Moreover, the degradation rate of toluene could maintain the best level (90.0%) under the conditions of TiO2 in ACH/TiO2 12.5% ±1%(ω), initial concentration of toluene 410 mg/m3, relative humidity 30% and gas flow rate 1 L/min, respectively. Water vapor could affect the photocatalytic degradation of toluene gas. The degradation rate of toluene could be kept unchanged for 6 h under illumination with the flow stability. ©, 2015, Science Press. All right reserved.


Yan W.,East China University of Science and Technology | Xuan S.,East China University of Science and Technology | Xuan S.,Shanghai Huaming Hi Technology Group Co. | Wu Q.,East China University of Science and Technology | Wu Q.,Shanghai Huaming Hi Technology Group Co.
Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering | Year: 2015

TiO2 nanorod composites were prepared on the flyash hollow microsphere substrates by a C2H5OH/H2O mixed solvothermal method. The morphology of TiO2 nanorod with different preparation conditions and the growth process was studied. The results reveal that the crystal form of TiO2 nanorods is rutile phase. The morphology and the size of TiO2 nanorod depend on the volume ratio of C2H5OH/H2O, titanium precursor concentration and reaction time. The crystallinity of TiO2 nanorod increases with appropriate ethanol, and also the tetragonal rodlike crystal morphology becomes distinct. The size of TiO2 nanorods gradually increases with the increase of concentration and reaction time. In addition, TiO2 nanorod composites show a better photocatalytic activity in degrading rhodamine B. © 2015, Science Press. All right reserved.


Zhang S.,East China University of Science and Technology | Zhang Q.,East China University of Science and Technology | Shen C.,East China University of Science and Technology | Ni Y.,East China University of Science and Technology | And 3 more authors.
Industrial and Engineering Chemistry Research | Year: 2015

This work investigated the self-activation behavior of large K2CO3-doped Li4SiO4 sorbent particles. In this self-activation mechanism, the sorption ability increased as the number of cycles increased. After the sorption-desorption cycles occurred, the sorption ability of the K2CO3-doped Li4SiO4 sorbent was remarkably enhanced from approximately 2.0 mmol CO2/g sorbent to approximately 5.0 mmol CO2/g sorbent at 565 °C in 10 vol % CO2 atmosphere. The fresh and used sorbents were then characterized through N2 adsorption and SEM methods. Results showed that the average pore size increased from 7 to 32 nm and the surface microstructure changed from dense to porous, because the molten eutectic mixture formed by Li2CO3 and Li2SiO3 can facilitate CO2 diffusion. The formed CO2 diffusion channel can provide more CO2 accessibility; this channel can also reduce the CO2 diffusion resistance through the product layer. Therefore, the sorption ability of the sorbent is enhanced. Meanwhile, the effects of the self-activation temperature were also investigated and the results revealed that the optimal self-activation temperature is 615 °C. Furthermore, under critical conditions, the self-activated sorbent performed more efficiently than the fresh sample. At 450 °C under 10 vol % CO2 atmosphere, the sorption capacity of the self-activated sorbent was approximately 20 times higher than that of the fresh sample. Finally, a pore-core model was also proposed to illustrate the K2CO3-doped Li4SiO4 self-activation mechanism. © 2015 American Chemical Society.

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