Destruction of an industrial wastewater by supercritical water oxidation in a transpiring wall reactor [An article from: Journal of Hazardous Materials]

This digital document is a journal article from Journal of Hazardous Materials, published by Elsevier in 2006. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.

Description:
The supercritical water oxidation (SCWO) is a technology that takes advantage of the special properties of water in the surroundings of critical point of water to completely oxidize wastes in residence times lower than 1min. The problems caused by the harsh operational conditions of the SCWO process are being solved by new reactor designs, such as the transpiring wall reactor (TWR). In this work, the operational parameters of a TWR have been studied for the treatment of an industrial wastewater. As a result, the process has been optimized for a feed flow of 16kg/h with feed inlet temperatures higher than 300^oC and transpiring flow relation (R) between 0.2 and 0.6 working with an 8% (w/w) isopropanol (IPA) as a fuel. The experimental data and a mathematical model have been applied for the destruction of an industrial waste containing acetic acid and crotonaldehyde as main compounds. As the model predicted, removal efficiencies higher than 99.9% were obtained, resulting in effluents with 2ppm total organic carbon (TOC) at feed flow of 16kg/h, 320^oC of feed temperature and R=0.32. An effluent TOC of 35ppm under conditions feed flow of 18kg/h, feed inlet temperatures of 290^oC, reaction temperatures of 570^oC and R=0.6.