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Difference between revisions of "Hydrothermal processing"
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Hydrothermal processing (view source)
Revision as of 15:35, 31 January 2022
, 15:35, 31 January 2022→Process
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* HTC occurs at temperatures between 180°C and 250°C and pressure of 2-4 MPa. This is the mildest of the three hydrothermal processing routes. The main product of HTC is solid hydrochar. | * HTC occurs at temperatures between 180°C and 250°C and pressure of 2-4 MPa. This is the mildest of the three hydrothermal processing routes. The main product of HTC is solid hydrochar. | ||
* HTL utilises subcritical water and occurs at temperatures between 250°C and 374°C and pressures up to 18 MPa. The main product of HTL is a liquid | * HTL utilises subcritical water and occurs at temperatures between 250°C and 374°C and pressures up to 18 MPa. The main product of HTL is a liquid biocrude. | ||
* HTG or supercritical water gasification (SCWG) occurs at temperatures above 374°C and higher pressures beyond 20 MPa. The main product of HTG is a syngas. | * HTG or supercritical water gasification (SCWG) occurs at temperatures above 374°C and higher pressures beyond 20 MPa. The main product of HTG is a syngas. | ||
== Product == | == Product == | ||
Depending on the technology, hydrochar, | Depending on the technology, hydrochar, biocrude or syngas is produced. The produced gas is not the same as conventional syngas from [[gasification]], which is comprised of hydrogen and carbon monoxide. Nevertheless, the gas is referred to as syngas but is typically high in either hydrogen or methane with carbon dioxide also present. The hydrochar can be utilised as fertilizers, adsorbents, and wastewater treatments. The intermediate biocrude can be further upgraded to liquid hydrocarbon fuels via catalytic hydrotreatment. | ||
=== Post-treatment === | === Post-treatment === | ||