Oxidation of CH3CHO by O3 and H2O2 Mixtures in Supercritical CO2 in a Perfectly Stirred Reactor

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• 作者：William M. Nelson and Ishwar K. Puri
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：1997
• 出版时间：September 1997
• 年：1997
• 卷：36
• 期：9
• 页码：3446 - 3452
• 全文大小：170K
• 年卷期：v.36,no.9(September 1997)
• ISSN：1520-5045

文摘

Organic waste streams must be handled in an environmentally benignmanner. We present analternative to incineration for such waste streams. The processinvolves the dissolution of theorganic byproducts into supercritical carbon dioxide and the subsequentoxidation of thesecompounds by ozone and hydrogen peroxide. The feasibility of theprocess is examined throughnumerical calculations on a surrogate organic species,CH₃CHO. A parametric matrix of theoptimal conditions that allow for complete destruction of acetaldehyde(into CO₂ and H₂O) andthe reaction pathways are evaluated. The oxidation process isexothermic, with as little as 2%acetaldehyde and 4% ozone (in a bath containing 94% supercriticalCO₂) reacting to produce analmost 600 K rise in temperature. The calculations indicate thatthe use of nonideal equationsof state provides results that are negligibly different from thoseobtained using the ideal gasrelationship.