scholarly journals Total organic carbon disappearance kinetics for supercritical water oxidation of dimethyl methylphospate used as a chemical agent simulant

2005 ◽  
Vol 22 (4) ◽  
pp. 579-584 ◽  
Author(s):  
Byoung Min Lee ◽  
Bambang Veriansyah ◽  
Sung-Hyun Kim ◽  
Jae-Duck Kim ◽  
Youn-Woo Lee
Keyword(s):  
Organic Carbon ◽  
Total Organic Carbon ◽  
Supercritical Water ◽  
Water Oxidation ◽  
Chemical Agent ◽  
Supercritical Water Oxidation ◽  
Disappearance Kinetics

Co-Oxidation Effects of Methanol on Reactive Orange 7 and Polyvinyl Alcohol in Supercritical Water

2013 ◽  
Vol 788 ◽  
pp. 258-262
Author(s):  
Jie Zhang ◽  
Shu Zhong Wang ◽  
Yan Meng Gong ◽  
Yan Hui Li ◽  
Jia Ming Lu
Keyword(s):  
Organic Carbon ◽  
Polyvinyl Alcohol ◽  
Total Organic Carbon ◽  
Co Oxidation ◽  
Supercritical Water ◽  
Water Oxidation ◽  
Supercritical Water Oxidation ◽  
Negative Effects ◽  
Reactive Orange ◽  
Inhibition Reaction

Methanol acting as co-oxidation component was introduced in supercritical water oxidation experiments of Reactive Orange 7 and polyvinyl alcohol. Experiments were performed at 673K and 25MPa. The concentrations of Reactive Orange 7 and polyvinyl alcohol were constant at 5wt% and 1wt%, respectively, with increasing methanol concentrations. For the binary mixture of methanol/ Reactive Orange 7, the experiment results showed that the total nitrogen and total organic carbon removals in the mixture were higher than that in the absence of methanol, and as methanol concentration increased, the accelerating effect was more notable. For methanol/polyvinyl alcohol mixture experiment, at the oxidation coefficient of 2.0, the presence of methanol (0.2-1.5 wt%) accelerated the decomposition rates of polyvinyl alcohol and total organic carbon, while methanol addition showed negative effects at the oxidation coefficient of 1.05. The inhibition reaction was attributed to the increment in induction time of polyvinyl alcohol oxidation in the presence of methanol.

Catalysis of CuSO4 for total organic carbon detection based on supercritical water oxidation

2016 ◽  
Vol 74 (2) ◽  
pp. 295-301 ◽  
Author(s):  
Zhang Hui ◽  
Han Dongdong ◽  
Chen Yi ◽  
Lin Chunmian
Keyword(s):  
Organic Carbon ◽  
Total Organic Carbon ◽  
Catalytic System ◽  
Supercritical Water ◽  
Water Oxidation ◽  
Total Carbon ◽  
Supercritical Water Oxidation ◽  
Carbon Detection ◽  
Lower Temperature ◽  
Catalytic Effects

The catalytic effects of CuSO4 in total organic carbon (TOC) detecting processes based on supercritical water oxidation have been investigated. Using benzoic acid as a model pollutant, the presence of a CuSO4 catalyst can significantly decrease the reaction temperature and H2O2 multiple during the TOC detection processes. A better TOC conversion efficiency was obtained at a much lower temperature in the catalytic system compared with the non-catalytic condition. The use of the catalyst effectively lowered the necessary H2O2 multiple from 20.0 without catalyst to 3.0 in the catalytic system. The established device could detect the TOC concentration precisely in model wastewater without inorganic carbon (IC). Moreover, the detection of the practical wastewater was studied. Detection results were total carbon of wastewater rather than TOC of practical wastewater. A detection or removal unit of IC is necessary before it can be practically utilized.

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