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Characterization method and device for in-situ unsteady surface chemical reaction

A chemical reaction and surface reaction technology, applied in scientific instruments, measuring devices, instruments, etc., can solve problems such as inability to achieve in-situ online detection of products and dynamic trends, poor stability, and poor synchronization with coal temperature changes

Inactive Publication Date: 2014-02-26
INNER MONGOLIA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above process cannot realize the in-situ on-line detection of the product during the reaction process and the dynamic trend with the change of coal temperature, poor stability and poor synchronization

Method used

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  • Characterization method and device for in-situ unsteady surface chemical reaction
  • Characterization method and device for in-situ unsteady surface chemical reaction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Example 1: The method of in-situ coal pyrolysis and semi-coke gasification reaction is as follows: firstly crush and sieve the coal block to the required particle size, dry the coal sample, take an appropriate amount and put it into the surface generating device, and then press a certain flow rate The carrier gas is introduced, and the temperature is programmed at different heating rates to the experimental predetermined temperature for a period of time to make semi-coke. During the pyrolysis process, the chromatographic mass spectrometer performs simultaneous and online detection of the pyrolysis products to quickly reflect the changes on the surface of the coal sample, and then The semi-coke sample is not taken out, and the gas generator is used to inject water vapor into the surface generator in situ to fully contact the semi-coke coal sample for gasification reaction. During the experiment, the gas generated in the surface generator is purified by the purifier Enter ...

Embodiment 2

[0021] Example 2: The method for catalytic reaction of in-situ methanation of synthesis gas is: first, grind or sieve the catalyst to the required particle size, take an appropriate amount and load it into the surface generating device, then feed the synthesis gas according to a certain flow rate and ratio, and heat up to The predetermined temperature of the experiment is constant, under a certain pressure, and then the synthetic gas is pumped into the surface generating device by the gas generating device to fully contact the catalyst for methanation reaction. During the experiment, the generated gas generated in the surface generating device is purified by the purifier and enters the The separation equipment is separated, and the detection and control system detects the H in the separated generated gas. 2 , CO 2 , CO and CH 4 Quantitative analysis of the gas concentration is carried out, and then the syngas enters another detection system for its simultaneous online qualita...

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Abstract

The invention relates to a detection method and a device, particularly a control system aiming at that coal and catalyst are used for an in-situ unsteady surface chemical reaction. The device mainly comprises a sample preparation system, a reaction system, a separation system and detection systems. Gas inlets, gas outlets and optional air vents of the system are provided with connectors and a purifier. The gas inlets and the gas outlets of the separation system and the detection systems are connected by the connectors. Corresponding gaseous products of the reaction performed under different conditions can be detected qualitatively and quantitatively by the method. The method and the device provide real-time and accurate online control. The device is compact in structure and can be operated conveniently.

Description

technical field [0001] The invention belongs to an in-situ non-steady-state surface chemical reaction characterization method and realization equipment, which is a control system for coal and catalysts used for in-situ surface chemical reaction on-line characterization. Reaction intermediates and final products were analyzed online. Background technique [0002] The research on surface chemical reaction involves two aspects: one is the chemical reaction in which surface substances participate, and the composition, structure, and properties of the surface change accordingly before and after the reaction; reaction. For the former, people's in-depth research has promoted the development of materials science, coal chemistry, electrochemistry and other fields; while the latter is the most concerned issue of catalysis. It is well known that some chemical reactions that occur on solid surfaces basically go through the following processes: first, reactant molecules are adsorbed on...

Claims

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Application Information

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IPC IPC(8): G01N33/00
Inventor 智科端刘全生唐艳花班延鹏
Owner INNER MONGOLIA UNIV OF TECH
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