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Reviews in Chemical Engineering

Editor-in-Chief: Luss, Dan / Brauner, Neima

Editorial Board: Agar, David / Davis, Mark E. / Edgar, Thomas F. / Giorno, Lidietta / Joshi, J. B. / Khinast, Johannes / Kost, Joseph / Leal, L. Gary / Li, Jinghai / Mills, Patrick / Morbidelli, Massimo / Ng, Ka Ming / Schouten, Jaap C. / Seinfeld, John / Stitt, E. Hugh / Tronconi, Enrico / Vayenas, Constantinos G. / Zagoruiko, Andrey

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Volume 33, Issue 3

Issues

Supercritical water gasification: a patents review

Pau CasademontORCID iD: http://orcid.org/0000-0001-8306-527X / M. Belén García-JaranaORCID iD: http://orcid.org/0000-0001-8449-3831 / Jezabel Sánchez-OnetoORCID iD: http://orcid.org/0000-0002-5580-356X / Juan Ramón PortelaORCID iD: http://orcid.org/0000-0001-6361-6492 / Enrique J. Martínez de la OssaORCID iD: http://orcid.org/0000-0001-5213-9686
Published Online: 2016-08-26 | DOI: https://doi.org/10.1515/revce-2016-0020

Abstract

Supercritical water gasification (SCWG) is a very recent technology that allows conversion of organic wastewaters into a fuel gas with a high content of hydrogen and light hydrocarbons. SCWG involves the treatment of organic compounds at conditions higher than those that define the critical point of water (temperature of 374°C and pressure of 221 bar). This hydrothermal process, normally operated at temperatures from 400 to 650°C and pressures from 250 to 350 bar, produces a gas effluent with a high hydrogen content. SCWG is considered a promising technology for the efficient conversion of organic wastewaters, mainly wet biomass, into fuel gas. This technology has received extensive worldwide attention, and many research groups have studied the effect of operation conditions, reaction mechanisms, kinetics, etc. There are some recent reviews about the research works carried out in the last decades, but there is no information or analysis of almost 100 patents registered in relation with this new technology. A revision of the current status of SCWG patents and technologies has been completed based on the Espacenet patent database. The objective of this revision was to set down the new perspectives toward the improvement of this technology efficiency. Patents have been published with regard to process or device improvements as well as to the use of different catalysts. More than 71% of these patents were published since 2009, and a substantial climb in the number of patents on SCWG is expected in the coming years. One of the most important aspects where research is particularly interesting if the integration of renewable energy recovery systems with SCWG processes.

Keywords: biomass; fuel gas; gasification; supercritical water; wastewater

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About the article

Pau Casademont

Pau Casademont is bachelor of environmental sciences and earned his master’s degree at the University of Cadiz and received his diploma in 2013. Since 2014, he has been pursuing his PhD thesis on treatment of wet biomass by supercritical water gasification at the University of Cadiz. In addition, he is working on the project “Production of Energy From Wet Biomass by Hydrothermal Processes at High Pressure.”

M. Belén García-Jarana

M. Belén García Jarana studied chemistry at the University of Cadiz and received her diploma in 2004. From 2005 to 2009, she did her PhD thesis on supercritical water oxidation and gasification for treatment of industrial wastewater at the University of Cadiz. Currently, she is a postdoctoral researcher at Analysis and Design of processes with supercritical fluids group. Currently, she is working on the project “Production of Energy From Wet Biomass by Hydrothermal Processes at High Pressure.”

Jezabel Sánchez-Oneto

Jezabel Sánchez-Oneto studied chemistry at the University of Valencia and chemical engineering at the University of Cádiz and received her PhD in chemical engineering in 2005. Since 2010 she has been a permanent professor of chemical engineering at the University of Cadiz. Her research area is reaction engineering at high pressures and temperatures, mainly in hydrothermal processes.

Juan Ramón Portela

Juan Ramón Portela was born in 1970 in Cádiz, Spain. He studied chemistry at the University of Cadiz and received his PhD in chemical engineering in 2000. Since 2005, he has been a permanent professor of chemical engineering at the University of Cadiz. His research area is reaction engineering at high pressures and temperatures, mainly in hydrothermal processes. Currently, he is the main researcher of the project “Production of Energy From Wet Biomass by Hydrothermal Processes at High Pressure.”

Enrique J. Martínez de la Ossa

Enrique J. Martínez de la Ossa received his PhD in chemistry at the University of Seville in 1982. Since 1997, he has been a full professor of chemical engineering at the University of Cádiz. In addition, he is head of the RD group “Analysis and Design of Supercritical Fluid Processes.” Currently, he is head of the Chemical Engineering and Food Technology Department. ORCID: 0000-0001-5213-9686; ResearchID: I-5974-2016; ScopusID: 6603791864.


Received: 2016-04-27

Accepted: 2016-07-08

Published Online: 2016-08-26

Published in Print: 2017-05-24


Citation Information: Reviews in Chemical Engineering, Volume 33, Issue 3, Pages 237–261, ISSN (Online) 2191-0235, ISSN (Print) 0167-8299, DOI: https://doi.org/10.1515/revce-2016-0020.

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