Extension of the DSC method to measuring vapor pressures of narrow boiling range oil cuts

Siitsman, Carmen; Oja, Vahur

doi:10.1016/j.tca.2015.04.011

Cited by 25 publications

(30 citation statements)

References 37 publications

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“…Note that the temperature of the DSC endothermic evaporation peak can be used for semiquantitative estimations. This temperature is generally close to the boiling point of a species [49] (for a more rigorous determination of the boiling point with DSC, a specific restriction has to be applied to the pan lid orifice along with modified experimental conditions) [50]. As seen from Figure 8, the compounds studied are arranged in the following row of this characteristic temperature: 14 (161 Therefore, at the time being, we infer that the high volatility is the main problem hindering the application of 1, 4, and 14 as standalone melt-cast explosives.…”

Section: Thermal Behavior Of the Furoxan Derivatives: Vaporizationmentioning

confidence: 99%

Nitro-, Cyano-, and Methylfuroxans, and Their Bis-Derivatives: From Green Primary to Melt-Cast Explosives

et al. 2020

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In the present work, we studied in detail the thermochemistry, thermal stability, mechanical sensitivity, and detonation performance for 20 nitro-, cyano-, and methyl derivatives of 1,2,5-oxadiazole-2-oxide (furoxan), along with their bis-derivatives. For all species studied, we also determined the reliable values of the gas-phase formation enthalpies using highly accurate multilevel procedures W2-F12 and/or W1-F12 in conjunction with the atomization energy approach and isodesmic reactions with the domain-based local pair natural orbital (DLPNO) modifications of the coupled-cluster techniques. Apart from this, we proposed reliable benchmark values of the formation enthalpies of furoxan and a number of its (azo)bis-derivatives. Additionally, we reported the previously unknown crystal structure of 3-cyano-4-nitrofuroxan. Among the monocyclic compounds, 3-nitro-4-cyclopropyl and dicyano derivatives of furoxan outperformed trinitrotoluene, a benchmark melt-cast explosive, exhibited decent thermal stability (decomposition temperature >200 °C) and insensitivity to mechanical stimuli while having notable volatility and low melting points. In turn, 4,4′-azobis-dicarbamoyl furoxan is proposed as a substitute of pentaerythritol tetranitrate, a benchmark brisant high explosive. Finally, the application prospects of 3,3′-azobis-dinitro furoxan, one of the most powerful energetic materials synthesized up to date, are limited due to the tremendously high mechanical sensitivity of this compound. Overall, the investigated derivatives of furoxan comprise multipurpose green energetic materials, including primary, secondary, melt-cast, low-sensitive explosives, and an energetic liquid.

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Section: Thermal Behavior Of the Furoxan Derivatives: Vaporizationmentioning

confidence: 99%

Nitro-, Cyano-, and Methylfuroxans, and Their Bis-Derivatives: From Green Primary to Melt-Cast Explosives

et al. 2020

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“…The method is based on the measurement principle and procedure underlying the ASTM E1782 standard "Standard Test Method for Determining Vapor Pressure by Thermal Analysis" [32]. The standardized method itself is for measuring boiling points of pure substances at specific pressures [33], but at our laboratory the first principles of the method were extended to measuring the vapour pressure and initial boiling points of oil fractions with narrow boiling ranges [34,35] and also to determining their weight average boiling points [31].…”

Section: Average Boiling Point Determination By Tgamentioning

confidence: 99%

Astm D86 Distillation in the Context of Average Boiling Points as Thermodynamic Property of Narrow Boiling Range Oil Fractions

Rannaveski¹,

Listak²,

Oja³

2018

Oil Shale

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The average boiling points (ABPs) of narrow boiling range oil distillation cuts are important in predicting thermodynamic and physical properties of oils. Due to convenience, simple batch distillation methods, either at atmospheric or reduced pressure, are often used to separate shale oils into fractions, including narrow boiling range fractions, and it has been attempted to calculate average boiling points directly from the distillation data. Using wide industrial shale oil fractions from Estonian kukersite oil shale and based on ASTM "Standard Test Method for Distillation of Petroleum Products at Atmospheric Pressure" (ASTM D86), this paper is aimed to find out how much the average boiling points determined directly from distillation, as an arithmetic average of the initial and final temperatures of the thermometer during fractions collection, differ from actual average boiling points (AABPs). The actual average boiling points of narrow boiling range oil fractions, pre-prepared by the same ASTM D86 distillation, were measured afterwards using a recently developed thermogravimetric analysis (TGA) based experimental method, which requires only about 20 mg of sample. The study indicated that AABPs were always lower than the respective average values determined directly from ASTM D86 distillation data.

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“…The reference substance is a capsule or unoccupied crucible of the same material and mass as the dish containing the substance of interest; because one of the capsules containing the sample and the other not, the excess solid in the crucible of the sample requires more heat to achieve the temperature increase at the same rate as the reference temperature. Through heat oven shown is supplied to the test substance through the furnace crucible reference to reference, to maintain equal temperatures; this behavior extends if the test substance transitions (endothermic or exothermic) such as synthesis, decomposition, crystallization and phase transformations occur; that is, the instrument compensates the thermal energy required to maintain the same temperature in the capsules sample and reference [35].…”

Section: Differential Scanning Calorimetrymentioning

confidence: 99%

Conceptual approach to thermal analysis and its main applications/Aproximación conceptual al análisis térmico y sus principales aplicaciones

et al. 2017

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This work shows to the reader a general description about the techniques of classic thermal analysis as known as Differential Scanning Calorimetry (DSC), Differential Thermal Analysis (DTA) and Thermal Gravimetric Analysis. These techniques are very used in science and material technologies (metals, metals alloys, ceramics, glass, polymer, plastic and composites) with the purpose of characterizing precursors, following and control of process, adjustment of operation conditions, thermal treatment and verifying of quality parameters.

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Extension of the DSC method to measuring vapor pressures of narrow boiling range oil cuts

Cited by 25 publications

References 37 publications

Nitro-, Cyano-, and Methylfuroxans, and Their Bis-Derivatives: From Green Primary to Melt-Cast Explosives

Nitro-, Cyano-, and Methylfuroxans, and Their Bis-Derivatives: From Green Primary to Melt-Cast Explosives

Astm D86 Distillation in the Context of Average Boiling Points as Thermodynamic Property of Narrow Boiling Range Oil Fractions

Conceptual approach to thermal analysis and its main applications/Aproximación conceptual al análisis térmico y sus principales aplicaciones

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