RPC "META-CHROM", Co. Ltd presents a multifunctional device "PTI-1", which allows to determine the resistance of granular catalysts and adsorbents to friction and abrasion according to SPENCE and ASTM D4058 standards.
Application of the device "PTI-1" for testing a granular sample for friction / abrasion (drum nozzle, ASTM D4058 -96 method).
The granulated sample (catalyst, catalyst carrier, adsorbent) is loaded into the drum nozzle. The drum nozzle makes 60 rpm for 30 minutes. At the end of the process, the tested sample is separated from the dust by sieving through a sieve (ASTM N°20 mesh 0.85 mm). By weighing the original sample and the residue on the sieve, the attrition loss of the granular sample is determined.
Calculation:
where
М1 – is the mass of a fresh sample after sieving;
М2 – is the mass of the tested sample after sieving.
Application of the device "PTI-1" for testing a granular sample for abrasion (cylindrical nozzle, SPENCE method).
Granular sample from 1 to 4 pieces, 25 grams each, is loaded into four cylinders. The cylindrical nozzle makes 25 rpm for 60 minutes. At the end of the process, the contents of the cylinders are sifted through a sieve (the mesh size is 2/3 of the smallest granule size). The initial sample, the sifted sample, and the remaining fines ("dust") are weighed. Based on the measured masses, the abrasion loss and abrasion resistance are calculated. This method has a wider particle size range than the ASTM method.
Calculation formulas:
where
М1 – initial mass of a fresh sample after sieving;
М2 – mass of the tested sample after sieving;
М3 – mass of dust.
Device advantages
The device "PTI-1" performs smooth acceleration and deceleration of the nozzle in order to avoid the effects of shock loads on the test sample, has the flexibility to set the parameters of the test process, thanks to the ability to set custom nozzle rotation speeds, test duration (from 1 min. to 7 days) and direction rotation regardless of the nozzle used, with the ability to save modes.
The device is run by a controller, all settings are made using the buttons on the front panel. Information is displayed with an intuitive user interface.
The design of the device provides three fixed positions of the nozzle for quick loading, testing and unloading of the test sample. The device has low consumption (up to 18 W) and low weight (12.5 kg). The use of a stepper motor with a gearbox provides a small error in maintaining speed (± 0.3 rpm).
Device Specifications |
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Basic operating modes: |
· Preset rotating drum method (ASTM D4058 -96) (60 rpm, 30 min). · Preset rotating cylinder method (SPENCE) (25 rpm, 60 min). · User mode with arbitrary setting of rotation frequency (from 10 to 60 rpm) and test duration (from 1 minute to 7 days). |
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Electric motor |
Stepper motor with gearbox |
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Speed maintenance error, rpm: |
± 0,3 |
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Control |
Digital (controller) |
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Power supply: |
100-240 V, 50/60Hz |
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Power consumption: |
18 W |
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Allowed sample weight: |
Not more than 100 g. |
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Mass: |
12.5 kg with cylindrical nozzle 10.8 kg with drum head |
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Overall dimensions, cm: |
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with cylindrical nozzle |
38,9х31,4х45,9
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with drum attachment |
48,5х30,4х45,4 |
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Sieve mesh sizes, mm: |
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by ASTM method |
ASTM No20 0.85 |
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according to the SPENCE method |
2/3 of the minimum granule size. At the request of the customer. |
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Scales (at the request of the customer) |
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Operating conditions |
UHL 4.2 |
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Ambient temperature |
from 10 °С to 35 °С |
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Relative air humidity at 25˚С, % |
no more than 80% |
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Atmosphere pressure |
84 to 107 kPa (630 to 800 mmHg) |
