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Visualization of supercritical water pseudo-boiling at Widom line crossover
Supercritical water is a green solvent used in many technological applications including materials synthesis, nuclear engineering, bioenergy, or waste treatment and it occurs in nature. Despite its relevance in natural systems and technical applications, the supercritical state of water is still not...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6748934/ https://www.ncbi.nlm.nih.gov/pubmed/31530816 http://dx.doi.org/10.1038/s41467-019-12117-5 |
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author | Maxim, Florentina Contescu, Cristian Boillat, Pierre Niceno, Bojan Karalis, Konstantinos Testino, Andrea Ludwig, Christian |
author_facet | Maxim, Florentina Contescu, Cristian Boillat, Pierre Niceno, Bojan Karalis, Konstantinos Testino, Andrea Ludwig, Christian |
author_sort | Maxim, Florentina |
collection | PubMed |
description | Supercritical water is a green solvent used in many technological applications including materials synthesis, nuclear engineering, bioenergy, or waste treatment and it occurs in nature. Despite its relevance in natural systems and technical applications, the supercritical state of water is still not well understood. Recent theories predict that liquid-like (LL) and gas-like (GL) supercritical water are metastable phases, and that the so-called Widom line zone is marking the crossover between LL and GL behavior of water. With neutron imaging techniques, we succeed to monitor density fluctuations of supercritical water while the system evolves rapidly from LL to GL as the Widom line is crossed during isobaric heating. Our observations show that the Widom line of water can be identified experimentally and they are in agreement with the current theory of supercritical fluid pseudo-boiling. This fundamental understanding allows optimizing and developing new technologies using supercritical water as a solvent. |
format | Online Article Text |
id | pubmed-6748934 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-67489342019-09-19 Visualization of supercritical water pseudo-boiling at Widom line crossover Maxim, Florentina Contescu, Cristian Boillat, Pierre Niceno, Bojan Karalis, Konstantinos Testino, Andrea Ludwig, Christian Nat Commun Article Supercritical water is a green solvent used in many technological applications including materials synthesis, nuclear engineering, bioenergy, or waste treatment and it occurs in nature. Despite its relevance in natural systems and technical applications, the supercritical state of water is still not well understood. Recent theories predict that liquid-like (LL) and gas-like (GL) supercritical water are metastable phases, and that the so-called Widom line zone is marking the crossover between LL and GL behavior of water. With neutron imaging techniques, we succeed to monitor density fluctuations of supercritical water while the system evolves rapidly from LL to GL as the Widom line is crossed during isobaric heating. Our observations show that the Widom line of water can be identified experimentally and they are in agreement with the current theory of supercritical fluid pseudo-boiling. This fundamental understanding allows optimizing and developing new technologies using supercritical water as a solvent. Nature Publishing Group UK 2019-09-17 /pmc/articles/PMC6748934/ /pubmed/31530816 http://dx.doi.org/10.1038/s41467-019-12117-5 Text en © The Author(s) 2019 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
spellingShingle | Article Maxim, Florentina Contescu, Cristian Boillat, Pierre Niceno, Bojan Karalis, Konstantinos Testino, Andrea Ludwig, Christian Visualization of supercritical water pseudo-boiling at Widom line crossover |
title | Visualization of supercritical water pseudo-boiling at Widom line crossover |
title_full | Visualization of supercritical water pseudo-boiling at Widom line crossover |
title_fullStr | Visualization of supercritical water pseudo-boiling at Widom line crossover |
title_full_unstemmed | Visualization of supercritical water pseudo-boiling at Widom line crossover |
title_short | Visualization of supercritical water pseudo-boiling at Widom line crossover |
title_sort | visualization of supercritical water pseudo-boiling at widom line crossover |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6748934/ https://www.ncbi.nlm.nih.gov/pubmed/31530816 http://dx.doi.org/10.1038/s41467-019-12117-5 |
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