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Optimization of Supercritical Water Oxidation(SCWO) Process for Decomposing Nitromethane
| Content Provider | Semantic Scholar |
|---|---|
| Author | 한주희 정창모 도승회 한기도 신영호 Chung, Chang Mo Do, Seung Hoe Shin, Young Ho |
| Copyright Year | 2006 |
| Abstract | The optimization of supercritical water oxidation (SCWO) process for ecomposing nitromethane was studied by means of a design of experiments. The optimum operating region for the SCWO process to minimize COD and T-N of treated water was obtained in a lab scale unit. The authors had compared the results from a SCWO pilot plant with those from a lab scale system to explore the problems of scale-up of SCWO process. The COD and T-N in treated waters were selected as key process output variables (KPOV) for optimization, and the reaction temperature (Temp) and the mole ratio of nitromethane to ammonium hydroxide (NAR) were selected as key process input variables (KPIV) through the preliminary tests. The central composite design as a statistical design of experiments was applied to the optimization, and the experimental results were analyzed by means of the response surface method. From the main effects analysis, it was declared that COD of treated water steeply decreased with increasing Temp but slightly decreased with an increase in NAR, and T-N decreased with increasing both Temp and NAR. At lower Temp as 420~430 oC, the T-N steeply decreased with an increase in NAR, however its variation was negligible at higher Temp above 450 oC. The regression equations for COD and T-N were obtained as quadratic models with coded Temp and NAR, and they were confirmed with coefficient of determination (r2) and normality of standardized residuals. The optimum operating region was defined as Temp 450-460 oC and NAR 1.03-1.08 by the intersection area of COD |
| Starting Page | 659 |
| Ending Page | 668 |
| Page Count | 10 |
| File Format | PDF HTM / HTML |
| Volume Number | 44 |
| Alternate Webpage(s) | https://www.cheric.org/PDF/HHKH/HK44/HK44-6-0659.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
