Stochastic Differential Scanning Calorimetry by Nonlinear Optical Microscopy

Sherman, Alex; Geiger, Andreas C.; Smith, Casey J; Taylor, Lynne S.; Hinds, Jeremy; Stroud, Paul A.; Simpson, Garth J.

doi:10.1021/acs.analchem.9b04300

Cited by 9 publications

(5 citation statements)

References 48 publications

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“…The integration of a SHG microscope with DSC would allow to monitor phase transitions of individual particles and the combination of both instruments was referred to as Stochastic differential scanning calorimetry (SDSC). 80 The authors measured phase transitions of supersaturated solutions of urea and D-(+) trehalose dihydrate for benchmarking the technique. The SHG imaging was sensitive to the packing arrangements of the crystals and this would not be observable with conventional microscopy.…”

Section: Inorganicsmentioning

confidence: 99%

Nonlinear optical probes of nucleation and crystal growth: recent progress and future prospects

et al. 2021

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Section: Inorganicsmentioning

confidence: 99%

Nonlinear optical probes of nucleation and crystal growth: recent progress and future prospects

et al. 2021

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“…Wax crystallization is accompanied by heat release, which is detected by the measuring system. Using this method, it is possible to measure with high accuracy the temperature of the phase transition in the studied fluid (Sherman et al 2019;Vicky Kett et al 2016). The method makes it possible to directly measure the enthalpy of wax crystallization.…”

Section: Differential-scanning Calorimetrymentioning

confidence: 99%

Formation damage induced by wax deposition: laboratory investigations and modeling

Sandyga

Struchkov

Рогачев

2020

J Petrol Explor Prod Technol

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There are oil fields, wherein favorable conditions for the formation damage induced by wax deposition are created during production. The damage can be expressed by a decrease in porosity and permeability and a reduction in the drainage area. There are only a few unconventional fields, and this makes them unique. To prevent this complication, it is necessary to control the field production. Assuming the presence of such problem, the conventional reserves may turn into difficult oil reserves whose production is problematic, which will compromise the project profitability. The key to the problem is associated with the experimental procedure and research conditions for investigation wax crystallization in oil, being the subject of this paper. The authors showed that the use of WAT measurement technique in an open measuring system is not enough to control wax deposition in the reservoir pore volume. Based on the results of the flooding technique and micro-computed tomography, a digital core, that allows to simulate fluid flow in the porous medium of the core before and after formation damage, has been created. The calculation of the change in the thermal field around the injection well over time, according to the extended Lauwerier's concept, has been carried out. WAT of a wax-bearing solution was measured by the rheology method using an open measuring system (plate-to-plate measuring system under atmospheric pressure), and the dependence of viscosity versus temperature was obtained during experimental studies. The temperature was decreased from 60 to 10 °C at a cooling rate of 1 °C/min. The experiment was carried out at atmospheric pressure and a shear rate of 5 s −1 . Also, filtration technique and micro-computed tomography were used. The dependence of the pressure gradient versus temperature and the pore throat diameter distribution functions for the initial core and core with organic scales were obtained. The flooding experiment was carried out at a constant flow rate of 0.5 cm 3 /min and confining pressure of 4.1 MPa. The temperature was decreased from 40 to 33 °C at a cooling rate of 1 °C/h. The inflection points on the curves viscosity versus temperature and pressure gradient versus temperature confirm the WAT. The results of the laboratory experiments showed that WAT, measured by the rheology method is 3-4 °C lower than WAT, measured by the flooding technique. The results of the micro-computed tomography showed that initial porosity decreased from 9.0 to 2.1% as a result of wax deposition. The pore throats with diameters from 20 to 70 μm are involved in the clogging with wax. The calculation results confirmed the possibility of cooling the near-wellbore area of injector to a temperature equal to WAT and the cold front movement to the producing wells. The production profiles calculated based on the models of porosity and permeability reduction, showed that wax deposition in the near-wellbore area can cause a significant decrease in the productivity index. An effective remediation technology for injection wells ...

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“…Pokhrel et al 19 performed XRPD and HR-TEM analysis during in situ heating but separately. Therefore, to our best knowledge XRPD and microscopy have never been coupled during an in situ XRPD experiment in a laboratory setup to obtain DSC-like data, and only Sherman et al 20 reported on a setup developed to detect stochastic phase transitions in single crystalline particles integrating a second harmonic generation microscope with an optical DSC stage. 21 The small number of publications about in situ XRPD studies of crystallization/melting of salt aqueous solutions can be ascribed to the difficult or impossible usage of standard low temperature XRPD setups, typically not suitable to investigate liquid samples because of evaporation, instrumental damage, and the need to use a very limited amount of sample.…”

Section: ■ Introductionmentioning

confidence: 99%

PCA Analysis of In Situ X-ray Powder Diffraction and Imaging Data Shedding New Light on Solid-State Transformations: The Crystallization of Low Temperature Eutectic Mixtures

Lopresti

Mangolini

Conterosito

et al. 2023

Crystal Growth & Design

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Eutectic mixtures are usually studied by differential scanning calorimetry (DSC), able to identify the transition temperatures, possible hysteresis, and investigate the energetic features of transformations. However, DSC is not able to give compositional, structural, or morphological information. A new approach is proposed exploiting powder X-ray diffraction (XRPD) and imaging to overcome the issues posed to diffraction by the presence of an amorphous liquid phase. Principal component analysis (PCA) is applied blindly to in situ XRPD data from both solid and liquid phases in an approach called differential scanning diffraction (DSD), with PCA scores being the reaction coordinate of melting or crystallization steps. PCA was used in a similar way to analyze the imaging data in what was named differential scanning imaging (DSI). Exploiting this approach, the structural and morphological changes during phase transitions can be characterized by XRPD and imaging respectively, complementarily to the energetic effects probed by DSC. Melting and crystallization points can be identified together with the hysteresis between downward and upward temperature ramps, by the structural and morphological viewpoints. A three-component mixture (NaBr, KCl, and water), with wide industrial applications, was studied to describe the behavior around the eutectic composition and examine how small mixture changes can affect the transition temperature and the freezing/melting behaviors. The phase composition at the solid state was elucidated and a new phase of NaBr was identified and its lattice parameters were obtained by XRPD. DSD and DSI resulted complementary to traditional DSC data with many potential applications in solid state chemistry and materials science.

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Stochastic Differential Scanning Calorimetry by Nonlinear Optical Microscopy

Cited by 9 publications

References 48 publications

Nonlinear optical probes of nucleation and crystal growth: recent progress and future prospects

Nonlinear optical probes of nucleation and crystal growth: recent progress and future prospects

Formation damage induced by wax deposition: laboratory investigations and modeling

PCA Analysis of In Situ X-ray Powder Diffraction and Imaging Data Shedding New Light on Solid-State Transformations: The Crystallization of Low Temperature Eutectic Mixtures

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