Visualization of supercritical water pseudo-boiling at Widom line crossover

被引：108

作者：

Maxim, Florentina ^{[1
,2
]}

Contescu, Cristian ^{[3
]}

Boillat, Pierre ^{[4
,5
]}

Niceno, Bojan ^{[6
,7
]}

Karalis, Konstantinos ^{[6
]}

Testino, Andrea ^{[1
]}

Ludwig, Christian ^{[1
,8
]}

机构：

[1] Paul Scherrer Inst, ENE Div, LBK, CH-5232 Villigen, Switzerland

[2] Ilie Murgulescu Inst Phys Chem, Lab Chem Thermodynam, Splaiul Independentei 202, Bucharest 060021, Romania

[3] Oak Ridge Natl Lab, Mat Sci & Technol Div, One Bethel Valley Rd, Oak Ridge, TN 37831 USA

[4] Paul Scherrer Inst, ENE Div, Electrochem Lab LEC, CH-5232 Villigen, Switzerland

[5] Paul Scherrer Inst, NUM Div, Lab Neutron Scattering & Imaging LNS, CH-5232 Villigen, Switzerland

[6] Paul Scherrer Inst, NES Div, Lab Sci Comp & Modelling LSM, CH-5232 Villigen, Switzerland

[7] Swiss Fed Inst Technol, MAVT LKE, CH-8092 Zurich, Switzerland

[8] Ecole Polytech Fed Lausanne, ENAC IIE GR LUD, CH-1015 Lausanne, Switzerland

来源：

NATURE COMMUNICATIONS | 2019年 / 10卷 / 1期

基金：

瑞士国家科学基金会;

关键词：

BIOFUEL PRODUCTION; DUBININ-ASTAKHOV; ADSORPTION; HYDROGEN; GASIFICATION; MECHANISM; BEHAVIOR; BIOMASS;

D O I：

10.1038/s41467-019-12117-5

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

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.

引用

页数：11

共 47 条

[1] Green materials synthesis with supercritical water [J].

Adschiri, Tadafumi ;

Lee, Youn-Woo ;

Goto, Motonobu ;

Takami, Seiichi .

GREEN CHEMISTRY, 2011, 13 (06) :1380-1390

[2]

Atkins P., 2006, PHYS CHEM

[3] First developments towards closing the nutrient cycle in a biofuel production process [J].

Bagnoud-Velasquez, M. ;

Schmid-Staiger, U. ;

Peng, G. ;

Vogel, F. ;

Ludwig, Ch. .

ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS, 2015, 8 :76-82

[4] Clustering of water molecules in ultramicroporous carbon: In-situ small-angle neutron scattering [J].

Bahadur, J. ;

Contescu, C. I. ;

Rai, D. K. ;

Gallego, N. C. ;

Melnichenko, Y. B. .

CARBON, 2017, 111 :681-688

[5]

Banuti D., 2017, P 55 AIAA AER SCI M, V2017

[6] Similarity law for Widom lines and coexistence lines [J].

Banuti, D. T. ;

Raju, M. ;

Ihme, M. .

PHYSICAL REVIEW E, 2017, 95 (05) :052120

[7] Crossing the Widom-line - Supercritical pseudo-boiling [J].

Banuti, D. T. .

JOURNAL OF SUPERCRITICAL FLUIDS, 2015, 98 :12-16

[8]

Banuti D. T., 2017, CTR TURBUL RES ANN R, V2017, P165

[9] Dual Spectrum Neutron Radiography: Identification of Phase Transitions between Frozen and Liquid Water [J].

Biesdorf, J. ;

Oberholzer, P. ;

Bernauer, F. ;

Kaestner, A. ;

Vontobel, P. ;

Lehmann, E. H. ;

Schmidt, T. J. ;

Boillat, P. .

PHYSICAL REVIEW LETTERS, 2014, 112 (24)

[10] Chasing quantitative biases in neutron imaging with scintillator-camera detectors: a practical method with black body grids [J].

Boillat, P. ;

Carminati, C. ;

Schmid, F. ;

Gruenzweig, C. ;

Hovind, J. ;

Kaestner, A. ;

Mannes, D. ;

Morgano, M. ;

Siegwart, M. ;

Trtik, P. ;

Vontobel, P. ;

Lehmann, E. H. .

OPTICS EXPRESS, 2018, 26 (12) :15769-15784

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