Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/72070
Citations | ||
Scopus | Web of Science® | Altmetric |
---|---|---|
?
|
?
|
Type: | Journal article |
Title: | Single-pass flow-through reaction cell for high-temperature and high-pressure in situ neutron diffraction studies of hydrothermal crystallization processes |
Author: | Xia, F. Brugger, J. Qian, G. Ngothai, Y. O'Neill, B. Zhao, J. Pullen, S. Olsen, S. Pring, A. |
Citation: | Journal of Applied Crystallography, 2012; 45(2):166-173 |
Publisher: | Munksgaard Int Publ Ltd |
Issue Date: | 2012 |
ISSN: | 0021-8898 1600-5767 |
Statement of Responsibility: | F. Xia, J. Brugger, G. Qian, Y. Ngothai, B. O'Neill, J. Zhao, S. Pullen, S. Olsen and A. Pring |
Abstract: | A large-volume single-pass flow-through cell for in situ neutron diffraction investigation of hydrothermal crystallization processes is reported. The cell is much more versatile than previous designs owing to the ability to control independently and precisely temperature (up to 673 K), pressure (up to 46 MPa), flow rate (0.01-10 ml min-1) and reaction-fluid volume ( 65 ml). Such versatility is realized by an innovative design consisting of a room-temperature and ambient-pressure external fluid supply module, a high-pressure reaction module which includes a high-temperature sample compartment enclosed in a vacuum furnace, and a room-temperature and high-pressure backpressure regulation module for pressure control. The cell provides a new avenue for studying various parameters of hydrothermal crystallizations independently, in situ and in real time at extreme hydrothermal conditions (e.g. supercritical). The cell was successfully commissioned on the high-intensity powder diffractometer beamline, Wombat, at the Australian Nuclear Science and Technology Organisation by investigating the effect of pressure on the hydrothermal pseudomorphic conversion from SrSO4 (celestine) to SrCO3 (strontianite) at a constant temperature of 473 K and flow rate of 5 ml min-1. The results show that the increase of pressure exerts a nonlinear effect on the conversion rate, which first increases with increasing pressure from 14 to 20 MPa, and then decreases when pressure further increases to 24 MPa. |
Keywords: | Hydrothermal cells in situ neutron diffraction vacuum furnaces mineral replacement reactions celestine (SrSO4) strontianite (SrCO3) |
Rights: | Copyright © International Union of Crystallography |
DOI: | 10.1107/S0021889812002300 |
Grant ID: | http://purl.org/au-research/grants/arc/DP1095069 http://purl.org/au-research/grants/arc/DP1095069 |
Published version: | http://dx.doi.org/10.1107/s0021889812002300 |
Appears in Collections: | Aurora harvest Chemical Engineering publications |
Files in This Item:
There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.