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JW-ZQ Steam Adsorption Instrument
In the JW-ZQ series physical adsorption instrument, if the adsorbate exists in liquid form at room temperature and pressure, it needs to be converted
Product details
JW-ZQ series
In a physical adsorption instrument, if the adsorbate exists in liquid form at room temperature and pressure, it needs to be converted from liquid to gas through a "gas generator", and then passed into a testing system for isothermal adsorption curve testing, also known as vapor adsorption testing.
Product Overview
| steam generator | 1 piece |
| Steam adsorption test position (1/0.1 Torr) | |
| Microporous adsorption test site (1/0.1 Torr) | |
| Cold trap | |
| 0-50 ° C constant temperature water bath | |
| 1L liquid nitrogen cup | |
| 3L liquid nitrogen cup |
Product Features
| Equipped with a steam generator as the source of adsorption gas |
| Stainless steel module for external air chamber, equipped with a constant temperature box (room temperature -50 ° C) |
| Steam adsorption system, passing through a cold trap during vacuum pumping |
| The sealing element adopts a fully fluorinated O-ring |
PRODUCT FUNCTION
| Low temperature nitrogen adsorption method, specific surface area and pore size distribution testing |
| Adsorption isotherm testing of various gases and vapors |
| Equivalent adsorption heat determination |
| Determination of gas selective adsorption coefficient |
Structural Comparison
| model | ZQ200C | ZQ100C | ZQ200B |
|---|---|---|---|
| steam generator | 1 piece | ||
| Steam station | 1 (1/0.1 Torr) | ||
| Micro porous station | 1 (1/0.1 Torr) | not have | |
| sensor | 7 of them | 5 of them | 4 of them |
| Cold trap | 1 piece | 2 of them | |
| Preprocessing bit | None (can be processed in situ) | 2 of them | |
| Constant temperature water bath | 1 (0-50 ° C) | ||
| 1L liquid nitrogen cup | 2 of them | not have | |
| 3L liquid nitrogen cup | 1 piece | 2 of them | 3 of them |
| mechanical pump | Including 1 corrosion-resistant pump | 2 (including 1 corrosion-resistant pump) | 1 corrosion-resistant pump or 1 mechanical pump |
| molecular pump | 1 piece | not have | |
Parameters
| model | ZQ200C | ZQ100C | ZQ200B |
|---|---|---|---|
| Testing Principles | Static capacity method | ||
| Physical adsorption performance | Specific surface area ≥ 0.01m2/g Mesopores: 2-500nm (BJH method) Micropores: 0.35-2nm (T-graph method, DR method, MP method, DA method, HK method, SF method) NLDFT) |
||
| Physical adsorbate | Nitrogen, argon, krypton, carbon dioxide, etc | ||
| Vapor adsorbate | Carbon monoxide, ammonia, and other substances that are liquid at room temperature (Excluding strongly corrosive, highly toxic, and hazardous gases) |
||
| Physical adsorption temperature | 77K, 87K | ||
| Steam adsorption temperature | 0-50°C | ||
| Steam recovery | Analysis of steam cold trap recovery | Analysis and pre-processing positions, dual cold trap steam recovery | |
| pretreatment | Vacuum in-situ pretreatment | Preprocessing bit+in-situ vacuum treatment | |
Other
| gas generator | When the adsorbate is liquid at room temperature and pressure, the adsorbate vapor formed by other generators can meet the requirements for gas adsorption testing |
| Adsorption pressure | P/P0 ＜ 1 (saturated vapor pressure of P0 adsorbate at adsorption temperature) |
| vacuum system | Imported special corrosion two-stage rotary vane vacuum pump, with a maximum vacuum of 10-1Pa; molecular pump, ultimate vacuum 10-8Pa |
| Pressure sensor | 1000 Torr, 10 Torr, 1 Torr |
| Adsorption temperature | The liquid nitrogen cup provides liquid nitrogen temperature testing conditions, while the semiconductor constant temperature water bath provides 0 ° -50 ° testing conditions |
| Quantity of intake air | According to customer requirements, provide 4xn (4, 8, 12) independent air intakes |
| gas recovery | Harmful gases are recovered through a cold trap (with a temperature of 77K) to ensure that the environment and mechanical pump oil are not contaminated |
| pretreatment | Vacuum in-situ pretreatment, temperature ≤ 400 ° C ± 1 ° C |
method comparison
| Comparison content | Volumetric method | gravimetric method |
|---|---|---|
| First-principles methods | Capacity method, pressure sensor gas equation calculation | The weight method and ultra-high precision balance allow for direct reading, making it intuitive |
| Sample testing system | Small size, compact structure, easy to maintain constant temperature, and not prone to corrosion | Large volume, poor temperature uniformity, and easy corrosion of the balance |
| function | When the pressure is P/P0<0.1, there are multiple adsorption curves; Use small amounts of steam in microliters; The test is not affected by airflow and the data is stable; Capable of BET and pore size testing; |
P/P0<0.1 cannot be tested; At least one hundred milliliters of gas is required; The balance is easily affected by airflow, resulting in data fluctuations; This function is not available; |
| pretreatment | Can be pre processed in situ | Cannot perform in-situ preprocessing |
| efficiency | Fast testing speed Multiple testing pressure points |
Slow testing speed Less testing pressure points |
| environmental condition | demand moderately | Very sensitive to small vibrations in the environment |
| steam consumption | Very low consumption | High consumption |
| price | Simple structure and low cost | Complex structure and high cost |
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