Application of ultra (near) critical water in environmental protection and industry

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8 Application of ultra (near) critical water in environmental protection

Super (near) critical water can extract non-polar compounds by weakening the bonding force between non-polar compounds and the matrix.
Using this property of supercritical water, it can be used to purify the soil and remove PAH and hydrocarbons in the soil.
And harmful metals
.

The near-critical hydrolysis method is used to extract the sapogenin from the yellow ginger, which has a simple process and is environmentally friendly
.

As the main component of plants, cellulose is widely present in nature.
It undergoes hydrolysis reaction with super (near) critical water and can be converted into oligosaccharides, monosaccharides and various degradation products, such as pyruvaldehyde and hydroxymethyl furan aldehyde.
and so on
.

Through the super (near) critical hydrolysis reaction of fish, poultry, feathers, hair and other biomass wastes, a variety of amino acids can be produced, which provides a novel environmental protection process for the resource utilization of biomass wastes, and Further scale-up experiments and reactor design provide a theoretical basis
.

Supercritical water can degrade polymers into monomers and low-molecular-weight compounds, realizing resource recycling
.

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9 Industrial applications

One of the six major areas listed in the US National Key Technology-"Energy and Environment" also emphasized that the most promising treatment technology is supercritical water oxidation technology
.

Table 2-6 SCWO Industrial Application Situation