Beijing Engineering Research Center for Process Pollution Control

Beijing, China

Beijing Engineering Research Center for Process Pollution Control

Beijing, China

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Nawaz F.,Beijing Engineering Research Center for Process Pollution Control | Nawaz F.,CAS Institute of Process Engineering | Nawaz F.,University of Chinese Academy of Sciences | Xie Y.,Beijing Engineering Research Center for Process Pollution Control | And 9 more authors.
Catalysis Today | Year: 2015

Two series of α-MnO2 materials were prepared via a similar method with surfactant cetyltrimethylammonium bromide (CTAB) and sodium dodecyl benzene sulfate (SDBS). The surfactants work both as shape directing agent and reduction initiator. The α-MnO2 synthesized with 0.2 M of CTAB showed a mesoporous structure with high surface area of 387.7 m2/g. It is very active in catalytic ozonation of 4-nitrophenol (4-NP) and total organic carbon removal, with higher catalytic stability than commercial MnO2. Using tert-butanol and p-benzoquinone as scavengers of different oxidative species, we found that superoxide radicals, rather than hydroxyl radicals, were mainly responsible for the degradation of 4-NP. © 2015 Elsevier B.V. All rights reserved.


Nawaz F.,Beijing Engineering Research Center for Process Pollution Control | Nawaz F.,CAS Institute of Process Engineering | Nawaz F.,University of Chinese Academy of Sciences | Xie Y.,Beijing Engineering Research Center for Process Pollution Control | And 9 more authors.
Catalysis Today | Year: 2015

Two series of α-MnO2 materials were prepared via a similar method with surfactant cetyltrimethylammonium bromide (CTAB) and sodium dodecyl benzene sulfate (SDBS). The surfactants work both as shape directing agent and reduction initiator. The α-MnO2 synthesized with 0.2M of CTAB showed a mesoporous structure with high surface area of 387.7m2/g. It is very active in catalytic ozonation of 4-nitrophenol (4-NP) and total organic carbon removal, with higher catalytic stability than commercial MnO2. Using tert-butanol and p-benzoquinone as scavengers of different oxidative species, we found that superoxide radicals, rather than hydroxyl radicals, were mainly responsible for the degradation of 4-NP. © 2015 Elsevier B.V.


Li J.,Beijing Engineering Research Center for Process Pollution Control | Li J.,CAS Institute of Process Engineering | Li J.,University of Chinese Academy of Sciences | Lin X.,Beijing Engineering Research Center for Process Pollution Control | And 7 more authors.
Journal of Chemical Thermodynamics | Year: 2014

The solubility of CO2 in aqueous 1,8-p-menthane-diamine (MDA) solution with substance concentrations of 0.625 and 1.25 mol · L -1 was measured at temperatures (313.15, 333.15 and 353.15) K with CO2 partial pressures ranging from (0.55 to 776.0) kPa and CO 2 loading ranging from (0.120 to 1.97) mol CO2 per mol MDA. The gas solubility results are expressed as the partial pressure of CO 2 (PCO2) against its mole ratio, i.e. αCO 2 (mol CO2 per mol MDA). The chemical absorption reaction and thermodynamic model have been proposed. The physicochemical Kent-Eisenberg model was used to correlate all the experimental results of the solubility of CO2 in the aqueous MDA solutions under investigation. The chemical equilibrium constants and model parameters were determined by fitting the VLE data. © 2013 Elsevier Ltd. All rights reserved.

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