GB/T 38432-2019 in English

VALID

Particle—Gas-solid reaction measurement—Micro fluidized bed method

Issued on:2019-12-31
Implemented on:2020-03-01
File Format:PDF
Delivery:Within 1 day

Price(USD)： $200.00
$194.00

Standard No:	GB/T 38432-2019
Document status:	VALID
Title in English:	Particle—Gas-solid reaction measurement—Micro fluidized bed method
Title in Chinese:	颗粒气固反应测定微型流化床法
Language:	English
File Format:	Electronic (PDF)
Delivery:	Within 1 day
Issued on:	2019-12-31
Implemented on:	2020-03-01
Professional Classification:	GB-National Standard
Related Topics:	fluidized bed microreactor Pellet fluidized bed particle melting air flow particle size Fluidized bed pellets Micro Airflow Detection Gas particle detection particle fluidity micro reaction synthesis Pellet fluidized bed flow fixation method micro reaction system Micro punch Liquid Particles micro reaction system micro bioreactor Environmental particles flow response magnetic particles hybrid particles Derivatization method flow response fixed particle miniaturization solid phase reaction Two Fluid Molybdenum Hydrogen Reaction Two fluid molybdenum + hydrogen + reaction chemical reaction reaction flow measurement micro stationary phase particles dust particles dust particles Fluidized bed parameters Fluidized bed spray granulation microsecond response Fluidized bed spray granulation solid particle voltammetry solid particle voltammetry micro granules The six particles of chemistry solid phase organic reaction Multiple micro bioreactors hybrid particles microfluidized bed microfluidized bed gasification Directional Chlorination micro fixed bed GBT38432 GB/T 38432-2019 fixed bed reaction space velocity Micro bioreactors for sale Fluidized bed reactor structure Fine particle fluidization Microparticle detection execution fluidized bed granulation Fixed method process Particle flow velocity measurement method Microwave reaction method Particle strain energy expression method Mitochondrial oxidation reaction detection method

《GB/T 38432-2019颗粒气固反应测定微型流化床法》由TC168（全国颗粒表征与分检及筛网标准化技术委员会）归口，TC168SC1（全国颗粒表征与分检及筛网标准化技术委员会颗粒分会）执行，主管部门为国家标准化管理委员会。

Introduction

GB/T 38432—2019 Standard Overview

GB/T 38432—2019 is a national standard of the People's Republic of China, which specifies the test method for the characteristics of gas phase products in gas-solid reactions involving particulate reactants or catalysts using microfluidized bed reactors.

Background and significance of standard formulation

Gas-solid reactions are widely used in the process industry, and the study of their characteristics, mechanisms and kinetic parameters is crucial to the development of science and technology. The microfluidized bed method provides basic data for reaction kinetic analysis by real-time online monitoring of the changes in gas component concentrations over time.

Technical Principle and Test Device

Component Name	Functional Description	Key Parameters
Micro Fluidized Bed Reactor	Load inert or catalyst particles to provide a gas-solid reaction environment.	Inner diameter ≤ 20 mm, bed height to bed diameter ratio ≤ 2.
Gas Online Detection Instrument	Real-time monitoring of gas phase product concentration changes over time.	Usually a process mass spectrometer is used with a response time of milliseconds.
System control software	Realizes pre-inspection, operation, data acquisition and analysis of the test device.	Supports multi-parameter synchronous monitoring, with error controlled within 0.3%.

Standard framework comparison

Based on the data in Appendix A and B, analyzes the gas flow characteristics and reaction test cases of the micro fluidized bed under different conditions.

Parameter Name	Quartz Sand 1	Quartz Sand 2	Quartz Sand 3
Average Particle Size (μm)	90	155	185
Minimum Fluidization Velocity (m/s)	0.0075	0.0221	0.0314
Residence Time Distribution Variance (s²)	0.78	0.65	2.44

Implementation Recommendations

To ensure the accuracy and repeatability of the test results, it is recommended that:

Select samples with a particle size between 5 μm ~ 500 μm and ensure that the mass ratio of fluidizing medium to sample is ≥ 100.
The test gas flow rate is controlled at 3 to 7 times the minimum fluidizing velocity to reduce the effect of gas backmixing.
Calculate the activation energy based on different conversion rates (0.2 ~ 0.9) and take the average value as the final result.
Regularly calibrate the online detection instrument and record all operating conditions and test data.

More samples: DL/T 5154-2012 JJG 21-2008 NB/T 47013.2-2015

Sample only — not a preview of GB/T 38432-2019

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