NB/SH/T 0964-2017 in English

Interpretation of the core content of the standard

This standard specifies the standardized method for determining the wear index of catalytic cracking catalysts using a straight tube wear equipment, which is applicable to the detection of fresh catalysts, balancing agents and auxiliary agents in the range of 0.1%~4.0%h^-1.

Key test principles

Instrument configuration requirements

Core equipment includes:>straight tube wear tester (inner diameter 23.5mm), wet flowmeter (accuracy ±1%), muffle furnace (750℃±10℃), etc. The air permeability of the filter paper tube must be strictly controlled at 6-14L/(m²·s).

Precision analysis

Collaborative tests show that:
Repeatability r=0.106+0.086x
Reproducibility R=0.044+0.214x
(x is the average of two measurements)

Key points for implementation

1. The sample needs to be pre-treated by calcination at 750℃
2. The sedimentation chamber must be knocked every 30 minutes
3. The filter paper cylinder needs to be pre-humidified
4. It is recommended to use a reference sample to calibrate the system

Background of standard evolution

As my country's first special standard for catalyst wear index, it fills the gap in the evaluation method of catalyst mechanical strength in the petrochemical field. Compared with the traditional vibrating screen method, the straight tube method is closer to the actual working conditions of industrial devices.