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This paper focuses on the color reaction of chromotrope and formaldehyde, an oxidation product of methanol, with sulfuric acid as the medium, under the existence of phosphoric acid. The generated purple complexes have characteristic absorption peak at wavelength of 570 nm. This reaction principle is applicable to measurement of methanol content in gas field wastewater. It is found there is a linear...
The TE010 mode cylindrical cavity was used for accurate complex permittivity measurements of lossy liquids at frequencies 7.4 GHz and 7.8 GHz. The complex permittivity was evaluated from measured resonance frequencies and Q-factors of the cavity with and without liquid under test employing rigorous electromagnetic analysis of the resonant structure in the complex frequency domain. Influence of the...
A silent discharge reactor (SDR) or a surface discharge reactor (SFR) was combined with catalysts such as MnO2, TiO2-SiO2 gel, etc. to investigate the synergistic effect of nonthermal plasma (NTP) and catalysts in the decomposition of volatile organic compounds (VOCs) such as toluene (PhCH3), dichloromethane and methanol. In the decomposition of PhCH3 with MnO2 pellets, the increases of PhCH3 conversion...
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