Pressure investigating method for deabsorbent dynamic parameter of adsorbent-gas system
A measurement method and adsorbent technology, applied in the direction of measuring devices, scientific instruments, electrical digital data processing, etc., can solve the problems of high instrument prices, inability to measure kinetic data, and inability to measure kinetic data, etc., and achieve the goal of expanding functions Effect
Inactive Publication Date: 2009-08-05
CHONGQING UNIV
View PDF3 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
But the problem that prior art exists is: (1) volumetric method: mainly adopt the ASAP-2010 specific surface area measuring instrument of U.S. Mike Company, based on measuring nitrogen adsorption equilibrium isotherm, can only measure equilibrium value, can not measure kinetics data
(2) Flow method: using gas chromatographic instruments, the gas adsorption amount can be calculated through the chromatographic peak area, but the kinetic data cannot be determined
(3) Gravimetric method: For example, the IGA series intelligent gas adsorption instrument of British Hiden analytical company can measure the adsorption and desorption kinetic curves, but it must rely on the accurate buoyancy correction system and the pressure that can overcome the pressure fluctuation during the adsorption-desorption process Stable system makes the control system complicated, and the price of the instrument is high (more than 1 million RMB), which cannot be promoted and implemented in general enterprises
However, there is no report on the patent for the determination of the desorption kinetic parameters of the adsorbent-gas system by the pressure method.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0020] 1. Preparation of instruments and materials
[0021] ASAP-2010 Specific Surface Area Rapid Determination Instrument (Mike, USA); high-pressure bottled high-purity He, N 2 、CH 4 , CO 2 (Chongqing Gas Factory); Adsorbent MOCP (self-made).
[0022] 2. Pressure measurement method for desorption kinetic parameters of adsorbent-gas system
[0023] Measurement steps
[0024] (1) At room temperature, put about 1 g of adsorbent MOCP into the sample tube, and vacuum until the pressure is lower than 10 μmHg;
[0025] (2) Connect the high-pressure steel cylinder of the gas to be tested to the backfill gas inlet of the instrument, and use the backfill button (Backfill) on the control panel of the ASAP-2010 rapid specific surface area analyzer to backfill the gas to be tested into the sample tube until it reaches 1 atmospheric pressure close backfill button;
[0026] (3) Press the fast pumping key to start timing simultaneously; collect data (p i , t i );
[0027] (4) Accord...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a pressure-type determining method of desorption dynamics parameters of a sorbent-gas system, conveniently using sample processing system of ASAP-2010 instrument and establishing a pressure-type determining method of desorption dynamics parameters under the drive of vacuum pump. And it can be used to determine the desorption dynamics curve of any sorbent-gas system under the drive of vacuum pump at a certain temperature and one atmosphere pressure without adding any fittings; derives a dynamics equation p=p0exp[-qt / V0(1+kd)], wherein pressure reduces with time going and obtains desorption rate constant kd; for a specific sorbent-gas system, determines kd at different temperatures and can also obtain desorption activation energy Ed, a. And the invention provides convenient testing means for researches on sorption behaviors of various natural artificial sorbents in the fields of interface physics and chemicals, material science, and engineering application.
Description
technical field [0001] The invention relates to a pressure measurement method for gas desorption kinetic parameters of an adsorbent-gas system, and belongs to the technical field of adsorbent material performance detection. Background technique [0002] The adsorption-desorption behavior of the adsorbent is affected by many factors such as the physical and chemical structure of the adsorbent surface, the interaction between the adsorbent and the adsorbate, the concentration of the adsorbate, the temperature and pressure during adsorption, and so on. Compared with the determination of isothermal adsorption data, the determination of adsorption-desorption kinetic data is much more difficult, especially the determination of gas adsorption and desorption kinetic data. However, the adsorption-desorption behavior of the adsorbent is a comprehensive reflection of the pore structure and pore surface characteristics of the adsorbent, and is an important indicator of the performance o...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & AuthorityPatents(China)
IPC IPC(8): G01N33/00G06F19/00
Inventor杨明莉武凯鲜学福张新涛
OwnerCHONGQING UNIV