Beijing Institute of Petrochemical Technology

About: Beijing Institute of Petrochemical Technology is a education organization based out in Beijing, China. It is known for research contribution in the topics: Catalysis & Corrosion. The organization has 2468 authors who have published 1937 publications receiving 19270 citations.

Activity Coefficients at Infinite Dilution of Alkanes, Alkenes, and Alkyl Benzenes in Glycerol Using Gas−Liquid Chromatography

Abstract: The activity coefficients at infinite dilution, γi∞, for 16 organic solutes, alkanes, alkenes, and alkyl benzenes in glycerol, have been measured by the gas−liquid chromatographic method at five temperatures from (303.15 to 343.15) K. The overall uncertainty was estimated to be about 5 %. The partial molar excess enthalpies at infinite dilution, HiE,∞, of the solutes in glycerol were also derived from the temperature dependence of the γi∞ values.

Experimental study and numerical analysis of thermocompressors with annular regenerators

Abstract: The thermocompressor is capable to utilize thermal energy directly to product pressure wave for pulse tube refrigerator To research its performance, an experimental system of a thermocompressor with an annular gap regenerator and its corresponding numerical model were established Then the performance was measured with different heating temperatures, charge pressures and working fluids The trends of the simulation results are consistent with the experimental ones, whereas the insufficient heat transfer between the gas and annular gap, and clearance volume should be responsible for the quantitative disparity Therefore, a piston with wire-cut gaps has been designed, fabricated, and tested With the new piston, the experimental results and the simulation show that the thermocompressor performance has been drastically improved The analysis also shows that the optimum performance condition is gained when the total thermal penetration depth is approximate to the hydrodynamic radius, which provides a principle for better operation of thermocompressor

In situ XRD and Raman Investigation of the Activation Process over K–Cu–Fe/SiO2 Catalyst for Fischer–Tropsch Synthesis Reaction

Abstract: A potassium- and copper-modified iron-based catalyst (K–Cu–Fe/SiO2) was synthesized by the co-precipitated method. The general structural properties of the catalyst were characterized with various techniques, including SEM, XRD, H2-TPR, N2 adsorption–desorption and Raman spectroscopy. The results reveal that the fresh catalyst is mainly composed of α-Fe2O3 phase with rod-shaped morphology formed by nanoparticles. The effect of activation process on the Fischer–Tropsch synthesis catalytic performance was then investigated. It shows that activation process has an important influence on the reactive stability. The in situ XRD and in situ Raman spectroscopy were used to study the structural changes of the Fe-based catalyst during reduction and reaction processes. The Fe2C iron carbide as the main active phase was observed after reduction process.

Investigation of Water Separation from Water-in-Oil Emulsion Using High-Frequency Pulsed AC Electric Field by New Equipment

Abstract: In this paper, water separation from water-in-oil emulsion was investigated in a new equipment designed by ourselves. The electric-field distribution in the drum has been deduced. The performance of oil demulsification was evaluated in terms of water separation efficiency by changing the frequency and voltage. The optimal water separation efficiency is achieved at 2 KHz and 4.5 kV. When operation parameters are below 2 KHz and 4.5 kV, the efficiency of water separation tends to increase as the frequency and voltage increase. However, when the operation parameters are above 2 KHz and 4.5 kV, the efficiency of water separation tends to decrease as the frequency and voltage increase.