Corrosion control methods in supercritical water oxidation and gasification processes

Marrone, Philip A.; Hong, Glenn T.

doi:10.1016/j.supflu.2009.08.001

Cited by 195 publications

(129 citation statements)

References 74 publications

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“…Supercritical water processing is performed at temperatures greater than 374°C and typically at pressures greater than 25 MPa. At these conditions, water behaves as a single non-condensable phase, with a density close to a liquid and transport properties similar to a gas (Marrone and Hong, 2009). …”

Section: Subcritical and Supercritical Water Hydrolysis Technologymentioning

confidence: 99%

Applications of subcritical and supercritical water conditions for extraction, hydrolysis, gasification, and carbonization of biomass: a critical review

et al. 2017

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Please cite this article as: Lachos-Perez D., Brown A.B., Mudhoo A., Martinez J., Timko M.T., Rostagno M.A., Forster-Carneiro T. Subcritical and supercritical water extraction, hydrolysis, gasification and carbonization of biomass: a critical review. Biofuel Research Journal 14 (2017) HIGHLIGHTSØAdvances of research trends in development of subcritical and supercritical water processes technologies are reviewed.Essential aspects of sub-and supercritical water applied to extraction, hydrolysis, carbonization and gasification processes are discussed. ØEquipment design, process parameters, and types of biomass used for sub-and supercritical water process are presented. ØBioactive compounds, reducing sugars, hydrogen, biodiesel, and hydrothermal char are the final products of sub-and supercritical water processes. This review summarizes the recent essential aspects of subcritical and supercritical water technology applied to the extraction, hydrolysis, carbonization, and gasification processes. These are clean and fast technologies which do not need pretreatment, require less reaction time, generate less corrosion and residues, do not use toxic solvents, and reduce the synthesis of degradation byproducts. The equipment design, process parameters, and types of biomass used for subcritical and supercritical water process are presented. The benefits of catalysis to improve process efficiency are addressed. Bioactive compounds, reducing sugars, hydrogen, biodiesel, and hydrothermal char are the final products of subcritical and supercritical water processes. The present review also revisits advances of the research trends in the development of subcritical and supercritical water process technologies. GRAPHICAL ABSTRACT ARTICLE INFO ABSTRACT

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Section: Subcritical and Supercritical Water Hydrolysis Technologymentioning

confidence: 99%

Applications of subcritical and supercritical water conditions for extraction, hydrolysis, gasification, and carbonization of biomass: a critical review

et al. 2017

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“…In addition, gases and minerals which are formed during the gasification lead to corrosion as well [136]. Marrone and Hong [138] propose some corrosion control approaches which are (i) vortex/circulating flow reactor to prevent corrosive species from reaching a solid surface; (ii) use of high corrosion resistant materials such as nickel based alloys or stainless steel or (iii) reducing the temperature to 400 °C instead of 600 °C to improve the energy balance which would enable using other types of corrosion control methods such as using liners or coatings that decrease the heat transfer.…”

Section: Process Challenges and Reactor Technology Aspects For Industmentioning

confidence: 99%

“…Xu et al [158] combined these two approaches for a sewage sludge supercritical water oxidation process which is expected to prevent reactor plugging and corrosion problems. However, Marrone and Hong [138] stated that the transpiring wall reactor has limited usefulness for gasification systems due to adverse effect of dilution on the system's energy balance. On the other hand, Schubert et al [159] used a salt separation vessel which the design is similar to MODAR's reverse flow reactor.…”

Section: Process Challenges and Reactor Technology Aspects For Industmentioning

confidence: 99%

Supercritical Water Gasification of Biomass: A Literature and Technology Overview

Yakaboylu

Harinck

Smit³

et al. 2015

Energies

172

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Abstract:The supercritical water gasification process is an alternative to both conventional gasification as well as anaerobic digestion as it does not require drying and the process takes place at much shorter residence times; a few minutes at most. The drastic changes in the thermo-physical properties of water from the liquid state to the supercritical state make it a promising technology for the efficient conversion of wet biomass into a product gas that after upgrading can be used as substitute natural gas. The earliest research goes back as far as the 1970s and since then, supercritical water has been the subject of many research works in the field of thermochemical conversion of wet biomass. This article reviews the state of the art of the supercritical water gasification technology starting from the thermophysical properties of water and the chemistry of reactions to the process challenges of such a biomass based supercritical water gasification process plant.

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“…In contrast, almost no oxides were observed in SHS at 0.1 MPa for 1000 hrs . However, very few investigations have been seen in that focused on the difference of the oxidation behavior between in SCW and SHS environment beyond 700°C (Marrone, 2009). …”

Section: Introductionmentioning

confidence: 99%

Analysis of localized oxides and oxide films formed on alloy 625 and 617 in supercritical water and superheated steam environments at 750°C

Ishikawa

Ozawa

Saito

et al. 2017

Mechanical Engineering Journal

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Oxidation tests using coupon specimens of alloy 625 and alloy 617, and four-point bending tests for a duration of 100 hrs were carried out in supercritical water (SCW) environment at a pressure of 24 MPa and in superheated steam (SHS) environments at 750°C. The noticeable difference between the oxidation in two environments appeared in the oxidation behavior of primary precipitates like Nb rich MC carbide for alloy 625. In the SCW environment, a large number of pitting was observed. Those were thought to be made by electrochemical reactions, while in SHS most of the carbides were oxidized as Nb oxides with some extent of volume expansion. In the case of alloy 617, the pitting formation was also observed in both environments. It seemed to have a dependence on the oxidation behavior of the primary carbides similar to that of alloy 625. The effect of the applied stress was not apparent under current experimental conditions because permanent deformation was observed in all the specimens and stress relaxation subsequently occurred during the test. In addition, no cracks were observed on both alloys after four-point bending tests. In the outer layer of the oxide film formed in the SCW, the Cr content exhibit to have smaller in both alloys, and the oxide thicknesses were 0.53 to 0.88 times thinner than those in the SHS.

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Corrosion control methods in supercritical water oxidation and gasification processes

Cited by 195 publications

References 74 publications

Applications of subcritical and supercritical water conditions for extraction, hydrolysis, gasification, and carbonization of biomass: a critical review

Applications of subcritical and supercritical water conditions for extraction, hydrolysis, gasification, and carbonization of biomass: a critical review

Supercritical Water Gasification of Biomass: A Literature and Technology Overview

Analysis of localized oxides and oxide films formed on alloy 625 and 617 in supercritical water and superheated steam environments at 750°C

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