Supercritical Water Oxidation: A Green Solution for Organic Waste Removal | Chapter 3 | Research Advances in Environment, Geography and Earth Science Vol. 8

 

Driven by rising pollution levels, there is an increasing demand for clean technologies that can effectively eliminate waste and produce harmless by-products. Traditional treatment methods are inadequate for eliminating complex organic and chemical industrial waste. Two viable alternatives are incineration and hydrothermal oxidation in supercritical conditions. Incineration is effective in removing hazardous waste but has notable drawbacks, including unwanted emissions and high operational costs. On the other hand, supercritical water oxidation (SCWO) is seen as an environmentally friendly technology for destroying organic waste, achieving a removal efficiency of 99.99% in a brief period. This chapter highlights the treatment of organic waste using SCWO, focusing on the use of co-fuels and catalysts to enhance its efficiency. Detailed analysis provides essential information for researchers and engineers aiming to use SCWO for the efficient and safe treatment of organic contaminants. Additionally, this chapter explores the current industrial applications of SCWO, examining technological advancements made by various companies developing full-scale SCWO facilities.

 

Author(s) Details

Falah Kareem Hadi Al-Kaabi
Department of Environment and Pollution, Marshes Research Centre, University of Thiqar, Thiqar, 64001, Iraq.

 

Please see the book here:- https://doi.org/10.9734/bpi/raeges/v8/1565

Enhancement of Supercritical Water Oxidation by Dihydric Alcohol | Chapter 9 | Current Topics and Emerging Issues in Chemical Science Vol. 2

 Supercritical water corrosion (SCWO) serves as an advanced method predominantly used for the management of stable basic wastes. The investigation proposed to explore the request of two types of alcohols, namely propylene glycol (PG) and isopropyl intoxicating (IPA), as co-fuels. The purpose was to determine their effectiveness in the destruction of 3-methylpyridine by taking advantage of hydrogen peroxide as the basic source of oxygen. The experiments were attended in a plug flow reactor under a pressure of 25 MPa and at hotnesses ranging from 425 to 525ºC, accompanying residence times variable from 6 s to 14 s. The results were analyzed in conditions of total organic element (TOC) removal as a function momentary and various process limits. The results showed that propylene glycol had a certain effect on the destruction of 3-methylpyridine, with TOC discharge reaching ≥ 97.5% at 525ºC and 14 s. The capital TOC removal effectiveness of 93% was achieved at 425ºC, 14 s, and a [propylene glycol]/[3-methylpyridine]o percentage of 3. Furthermore, the presence of propylene glycol enhanced the removal efficiency of nitrogen, that reached 89% at 525ºC and 10 s. The oxidant percentage was also establish to have a positive effect on the discharge of TOC in all three plans. Propylene glycol showed a greater affect the ratio at 425ºC than isopropyl intoxicating, owing to two together hydroxyl groups in propylene glycol's oxidation, that generate differing free radicals and enhance the reaction.

Author(s) Details:

Falah Kareem Hadi Al-Kaabi,
Environment and Pollution Department, Marshes Research Centre, University of Thiqar, Thiqar-64001, Iraq.

Please see the link here: https://stm.bookpi.org/CTEICS-V2/article/view/11535