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Flowing high temperature and high pressure phase equilibrium measuring device and application method thereof

A technology of high temperature and high pressure, measuring device, applied in sampling device, color/spectral characteristic measurement, etc., to achieve the effect of accurate and reliable measurement process, accurate and reliable data, and convenient collection

Inactive Publication Date: 2013-07-10
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to obtain basic data for phase equilibrium research, experimental equipment capable of measuring phase equilibrium data under the conditions of high temperature and high pressure is indispensable. However, most of the current domestic phase equilibrium measurement devices can only work under high temperature and low pressure or high pressure and low temperature conditions.

Method used

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  • Flowing high temperature and high pressure phase equilibrium measuring device and application method thereof
  • Flowing high temperature and high pressure phase equilibrium measuring device and application method thereof
  • Flowing high temperature and high pressure phase equilibrium measuring device and application method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0042] (1) Heat the preheating coil 9 and tubular mixer 10 of the mobile high-temperature and high-pressure phase equilibrium measurement device to 473-523K (lower than the equilibrium temperature 50K set in the experiment) by an electric heating system, and put the balance kettle 11, The gas phase sampling tube 20 and the liquid phase sampling tube 28 are heated to the equilibrium temperature (523-573K) set in the experiment, and methanol and α-tocopherol (the molar fraction of methanol is 0.96-0.98) are filled in the liquid reagent bottle 1 .

[0043] (2) Extract the mixture of methanol and α-tocopherol with feed pump 3 at a feed rate of 7.49-9.34 mL per minute. The preheating coil 9 is preheated to 50-100K lower than the equilibrium temperature, and after being fully mixed in the tube mixer 10, the pressurized liquid enters the equilibrium tank 11. After the solution stays in the balance kettle 11 for 3.79-4.18 minutes, it enters the liquid recovery container through the m...

Embodiment 2

[0050] (1) Use an electric heating system to preheat the preheating coil 9 and mixer 10 of the mobile high temperature and high pressure phase balance measurement device to 473-523K (about 50K lower than the equilibrium temperature set in the experiment), and put the balance kettle 11, The gas phase sampling tube 20 and the liquid phase sampling tube 28 are heated to the equilibrium temperature (523-573K) set in the experiment, and methanol and methyl oleate are filled in the liquid reagent bottle 1 (the molar fraction of methanol is 0.96-0.98) .

[0051] (2) Extract the mixture of methanol and methyl oleate with feed pump 3 at a feed rate of 7.49-9.34 mL per minute. The preheating coil 9 is preheated to 50-100°C lower than the equilibrium temperature, and after being fully mixed in the tube mixer 10, the pressurized liquid enters the equilibrium kettle 11. After the solution stays in the balance kettle 11 for 3.79-4.18 minutes, it enters the liquid recovery container through...

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Abstract

The invention discloses a flowing high temperature and high pressure phase equilibrium measuring device and an application method of the flowing high temperature and high pressure phase equilibrium measuring device. The flowing high temperature and high pressure phase equilibrium measuring device comprises a feed system, an equilibrium still, a sampling system and an ultraviolet online detecting system; the equilibrium still is made from GH132 nickel base alloy to resist against a high temperature of 773K and a high pressure of 50MPa so as to obtain a stable phase equilibrium state within a large temperature and pressure range; a window is made from sapphire, so that the whole device is visible, the whole measurement process is accurate and reliable, and the phase equilibrium change process is convenient to shoot; the reasonable feed system is used for guaranteeing uniform ingredients and uniform mixing of reagents entering the equilibrium still; the reasonable sampling system is used for preventing the sampling process from affecting the phase equilibrium of the flowing system; and the ultraviolet online detecting system facilitates collection of data and is used for comparing the data with the sample data obtained by the sampling system to guarantee the accuracy and reliability of the data.

Description

【Technical field】 [0001] The invention relates to the technical field of phase balance measurement, in particular to a device for phase balance measurement under the condition of simultaneous high temperature and high pressure and its application method. 【Background technique】 [0002] In the context of the depletion of fossil energy, energy and environmental issues have become the key factors determining the sustainable development of human society, biodiesel, as an efficient, clean and sustainable new energy, has become a hot spot of international attention. Fatty acid methyl ester is an important biodiesel, usually derived from the transesterification reaction (also known as alcoholysis or transesterification reaction) of animal, vegetable or microalgae oil (fatty acid glyceride) with methanol. In 2001, Saka and Kusdiana used supercritical methanol (the state where the temperature and pressure of methanol is higher than its critical point (512K, 8.1MPa)) to prepare biodie...

Claims

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Application Information

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IPC IPC(8): G01N21/33G01N1/10
Inventor 方涛徐杰姜召黄书成
Owner XI AN JIAOTONG UNIV
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