CN203811496U - Weight-method physical adsorption instrument - Google Patents
Weight-method physical adsorption instrument Download PDFInfo
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- CN203811496U CN203811496U CN201420155921.0U CN201420155921U CN203811496U CN 203811496 U CN203811496 U CN 203811496U CN 201420155921 U CN201420155921 U CN 201420155921U CN 203811496 U CN203811496 U CN 203811496U
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Abstract
The utility model discloses a weight-method physical adsorption instrument. The weight-method physical adsorption instrument comprises a vacuum chamber, a microbalance, a multi-sample conversion device and a vacuum pump, wherein the bottom end of the vacuum chamber is provided with a sample pipe connecting opening; the microbalance is arranged in the vacuum chamber; the bottom end of the microbalance is provided with a plurality of testing positions which can extend out of a sample pipe of the vacuum chamber into the sample pipe connected with the vacuum chamber; the multi-sample conversion device is connected with the plurality of testing positions and can drive the plurality of testing positions be to converted; the vacuum pump is communicated with the inner part of the vacuum chamber by a pipeline and a valve. The weight-method physical adsorption instrument disclosed by the utility model has the advantages that since the bottom end of the microbalance is provided with the plurality of testing positions which are driven by the arranged multi-sample conversion device, the conversion for the positions of all the testing positions is realized, and a plurality of samples can be measured by one microbalance, so that not only is the testing efficiency improved, but also the cost and the volume of the absorption instrument are also not increased.
Description
Technical field
The utility model relates to adsorption plant field, particularly relates to a kind of gravimetric method physical adsorption appearance easy to use.
Background technology
Gas molecule or steam molecule can be adsorbed by solid surface, if adsorption molecule is combined with solid surface to be similar to the physical process of cohesion, with Van der Waals force, interact, and are called physisorption.In general, at a certain temperature, more hold liquescent gas and be more easily adsorbed, absorption can be unimolecular layer can be also polymolecular layer, desorb is also relatively easy.Physisorption measure the specific surface of material and pore diameter distribution aspect be widely used, wherein vital role has been brought into play in nitrogen absorption under low temperature and steam absorption.Gravimetric method steam adsorption instrument be by gas under certain relative humidity by sample after the variation of weight measure steam and adsorb, faster than traditional dry method measurement, more save time, it combines the technical advantage of micro-balance, gas flow and vapour survey.The application of gravimetric method physical adsorption appearance has vital role, can be used for the problem of solid material existence in definite product structure, product stability, hydroscopicity and the product developments such as laboratory, research and development department and Quality Control department etc.
During current gravimetric method physical adsorption appearance test sample, hang a sample test position below a microbalance, so once can only test a sample.If realize a gravimetric method physical adsorption appearance to a plurality of sample tests, need to use a plurality of microbalances.
And the problem existing is: adopt a plurality of microbalances not only to increase instrument volume, and because microbalance price is higher, can improve testing cost, and also make testing efficiency lower.
Utility model content
The technical problems to be solved in the utility model is to provide a kind of gravimetric method physical adsorption appearance, can not increase the quantity of microbalance, realizes a plurality of sample tests, thereby addresses the above problem.
For solving the problems of the technologies described above, the utility model provides a kind of gravimetric method physical adsorption appearance, comprising:
Vacuum chamber, microbalance, Multi-example conversion equipment and vacuum pump;
Wherein, the bottom of described vacuum chamber is provided with sample hose connector;
Described microbalance is arranged in described vacuum chamber, and described microbalance bottom is provided with a plurality of test bits, and described each test bit all can extend out to from the sample hose connector of described vacuum chamber in the sample hose of described vacuum chamber connection;
Described Multi-example conversion equipment is connected with described a plurality of test bits, can drive described a plurality of test bit conversion respectively to test bit position;
Described vacuum pump is communicated with in described vacuum chamber with valve by the road.
The beneficial effects of the utility model are: by a plurality of test bits being set in microbalance bottom, and drive the plurality of test bit by the Multi-example conversion equipment arranging, realize conversion and respectively test bit position, realizing a microbalance can measure a plurality of samples, not only improve testing efficiency, also do not increase cost and the volume of adsorption instrument.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the utility model embodiment, below the accompanying drawing of required use during embodiment is described is briefly described, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain other accompanying drawings according to these accompanying drawings.
The structural representation of the gravimetric method physical adsorption appearance that Fig. 1 provides for the utility model embodiment;
In figure, each label is: 1-vacuum chamber; 2-microbalance; 21-test bit; 22-control device; 31-conversion equipment; 32-magnetic drive device; 33-drive unit; 4-sample hose; 5-isothermal reaction is bathed; 6-vacuum pump; 7-distilling apparatus; 8-nitrogen source of the gas; 9-liquid nitrogen cold trap device; 10-temperature sensor; 11-the first valve; 12-the second valve; 13-the 3rd valve.
Embodiment
Below the technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, rather than whole embodiment.Based on embodiment of the present utility model, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to protection domain of the present utility model.
Figure 1 shows that the utility model embodiment provides a kind of gravimetric method physical adsorption appearance, the testing tool that can be used as nitrogen absorption under low temperature or steam absorption, this adsorption instrument comprises: vacuum chamber, microbalance, Multi-example conversion equipment, vacuum pump, temperature sensor and control device;
Wherein, the bottom of vacuum chamber is provided with sample hose connector;
Microbalance is arranged in vacuum chamber, and microbalance bottom is provided with a plurality of test bits, and each test bit all can extend out to from the sample hose connector of vacuum chamber in the sample hose of vacuum chamber connection;
Multi-example conversion equipment is connected with a plurality of test bits, can drive a plurality of test bit conversions respectively to test bit position;
Vacuum pump is communicated with in vacuum chamber with valve by the road;
Vacuum pump is communicated with in vacuum chamber with valve by the road;
Temperature sensor is arranged in described vacuum chamber, and its end of probe can be stretched out in the sample hose that is arranged on described vacuum chamber connection.
Preferably, above-mentioned adsorption instrument also comprises: control device, be arranged on outside vacuum chamber, and be electrically connected to microbalance and temperature sensor respectively, for the data of the temperature sensor that obtains and control microbalance.Control device can adopt computer.
In above-mentioned gravimetric method physical adsorption appearance, Multi-example conversion equipment comprises: conversion equipment, magnetic drive device and drive unit;
Wherein, conversion equipment is arranged in vacuum chamber and is connected with a plurality of test bits;
Drive unit is arranged on outside vacuum chamber;
Magnetic drive device is comprised of the first magnet and the second magnet, and the first magnet is arranged in vacuum chamber, is connected with conversion equipment; The second magnet is arranged on outside vacuum chamber, is connected with drive unit; The first magnet is connected with the second magnet magnetic coupling.
Above-mentioned gravimetric method physical adsorption appearance also comprises: the isothermal reaction of placing sample hose is bathed, and is arranged on vacuum chamber below.
Above-mentioned gravimetric method physical adsorption appearance also comprises: distilling apparatus, distilling apparatus is communicated with in vacuum chamber with valve by the road.
In above-mentioned gravimetric method physical adsorption appearance, distilling apparatus is provided with two distillation positions that are connected with valve by pipeline.
Above-mentioned gravimetric method physical adsorption appearance also comprises: nitrogen source of the gas, is communicated with in vacuum chamber with valve by the road.
Above-mentioned gravimetric method physical adsorption appearance also comprises: liquid nitrogen cold trap device, is arranged on the connecting line between vacuum pump and vacuum chamber.
Below in conjunction with the drawings and specific embodiments, adsorption instrument of the present utility model is described further.
The gravimetric method physical adsorption appearance that the utility model embodiment provides both can have been done steam absorption test, can do again nitrogen absorption under low temperature test, this adsorption instrument mainly comprises: vacuum chamber, microbalance, Multi-example conversion equipment and vacuum pump, further comprise: distilling apparatus, nitrogen source of the gas and liquid nitrogen cold trap device.Wherein, internal vacuum chamber is provided with temperature sensor, and the effect of Multi-example conversion equipment is by magnetic force conversion equipment, to realize single balance Multi-example conversion to weigh, thereby realize, a plurality of samples is tested; The effect of distilling apparatus is by distilling apparatus purification adsorbate, for steam absorption test provides high-purity steam; Nitrogen source of the gas has two effects, can be used as on the one hand the source of the gas of nitrogen absorption under low temperature test, after system testing, in vacuum chamber, owing to vacuumizing in low pressure, in vacuum chamber, is filled with nitrogen on the other hand, makes to recover normal pressure in vacuum chamber, is convenient to sample hose dismounting.The effect of liquid nitrogen cold trap device is the steam-condensation of this cold-trap device of flowing through, and stays in cold-trap device, prevents that steam from entering vacuum pump, pollutes vacuum pump.
Respectively each device is described below:
(1) Multi-example conversion equipment:
By Multi-example conversion equipment is set, this adsorption instrument has been realized single balance Multi-example test, as shown in Figure 1, and in vacuum chamber, a plurality of sample tests of suspended position below single microbalance, the sample quality of each test bit is driven successively and is weighed in turn by Multi-example conversion equipment.Have the following advantages: with a microbalance, can measure successively the quality of different test bit samples, thereby realize the test of a plurality of samples, lowering apparatus cost, has improved testing efficiency.
By Multi-example conversion equipment, coordinate with the microbalance that a plurality of sample tests position is set, solved existing gravimetric method physical adsorption appearance and once can only test a sample, below a balance, can only hang a sample test position.If realize the test of a plurality of samples, need to use a plurality of microbalances, will improve testing cost like this, increase instrument volume, exist testing efficiency low, the problem that cost is high.
Above-mentioned Multi-example conversion equipment consists of conversion equipment, magnetic drive device and drive unit (can adopt motor), in this gravimetric method physical adsorption appearance test process, to the conversion of the sample weighing of each test bit, be that conversion equipment by being placed in the vacuum chamber of constant temperature in instrument is realized, thereby utilize motor as drive unit to drive magnetic drive device to realize it, weigh translation function.If the motor as drive unit is directly connected with gearing, it is indoor that this just need to be placed in constant-temperature vacuum by motor, owing to generating heat in machine operation process, affects the constant temperature effect of vacuum chamber, cause the inconstant situation of vacuum indoor temperature, thereby affect test result; And motor heating in the course of the work also can affect the stability of microbalance.If it is outdoor that motor is placed in to constant-temperature vacuum, if adopt mechanical seal to exist mechanical drive to be difficult for sealing, can not guarantee the problem of the vacuum tightness of vacuum chamber.
Multi-example conversion equipment of the present utility model adopts magnetic drive device to solve the problem of the difficult sealing of mechanical drive, between motor and conversion equipment, add magnetic apparatus (being formed by the first magnet and the second magnet that can magnetic coupling be connected) as magnetic drive device, the driving link (i.e. the second magnet) of the moving magnetic apparatus of motor straight tape splicing, and the driving link of magnetic apparatus drives Passive part (i.e. the first magnet) under the effect of magnetic force, thereby realize contactless magnetic drives.It is mutually contactless that the driving link of magnetic drives and Passive part are connected by magnetic couple, realized the static seal state of power transmission, realized zero leakage; Avoided because motor is placed in vacuum chamber, the motor feels hot affects the temperature of vacuum chamber simultaneously, causes the inconstant situation of vacuum chamber temperature; Magnetic drive device is without being rigidly connected, and vibration resistance is strong, and motion steadily.Therefore, magnetic drive device is applied in vacuum system, have simple in structure, motion steadily, the advantages such as zero leakage.
(2) distilling apparatus:
In the adsorption instrument of the utility model embodiment, the distilling apparatus of setting is connected with the vacuum chamber of this adsorption instrument by vent line, for test provides high-purity vapour source.The preprocessing process of still-process and sample can carry out simultaneously.Described distilling apparatus contains two distillation positions, distills position A and distillation position B, distills position A and the B parallel connection of distillation position.Described distillation position A has two effects, both can be used as distillation position, can be used as again the test bit of saturated vapor pressure.This distilling apparatus setting is arranged on gravimetric method physical adsorption appearance, simple in structure, convenient operation.
The specific works process of this distilling apparatus is: first in the A of distillation position, pack the distillation cascade containing organic reagent into, on the B of distillation position, pack empty clean distillation cascade into, three valves 11,12 and 13 are opened, vacuumize a period of time, make the organic reagent in distillation cascade A evaporate a little, remove portion low boiling impurity; Then distillation cascade A is placed in to liquid nitrogen environment and lowers the temperature, under liquid nitrogen temperature, adsorbate can solidify, and continues to vacuumize a period of time, and the gas in distillation cascade A, B is drained only; Valve-off 12, takes off liquid nitrogen cup and distillation cascade B is placed in to liquid nitrogen environment and lower the temperature, adopt automatic heating or the auxiliary mode heating up that organic reagent in distillation cascade A is melted and evaporation and condensation in distillation cascade B, and under solidifying under liquid nitrogen temperature; While finally remaining a small amount of organic reagent in distillation cascade A, (now in remaining this small amount of reagent, contain more high-boiling-point impurity), valve-off 11, changes clean empty distillation cascade by a distillation position A, then the adsorbate in the B of distillation position is distilled in A according to aforesaid operations.Aforesaid operations just can obtain high-purity adsorbate repeatedly, and the high-purity adsorbate finally obtaining is retained on the A of distillation position.The preprocessing process of still-process and sample can carry out simultaneously, is independent of each other.
This adsorption instrument arranges distilling apparatus, has solved on existing gravimetric method steam adsorption instrument and there is no purifying plant, if the adsorbate purity of using in test process is inadequate, the impurity in adsorbate will affect the absorption of sample to adsorbate, thereby affects test result; If adsorbate is purified, need to find in addition purifying plant, the problem that can make troubles to operator.
(3) this adsorption instrument both can have been done steam absorption test, can do again nitrogen absorption under low temperature test:
This adsorption instrument source of the gas partly comprises steam source of the gas and nitrogen source of the gas, both can do steam absorption test, can do again nitrogen absorption under low temperature test, wherein, nitrogen absorption under low temperature test is realized by nitrogen source of the gas, nitrogen source of the gas has two effects, can be used as on the one hand the source of the gas of nitrogen absorption under low temperature test, for test provides high pure nitrogen; After system testing, in vacuum chamber, owing to vacuumizing in low pressure, in vacuum chamber, be filled with nitrogen on the other hand, make to recover normal pressure in vacuum chamber, be convenient to sample hose dismounting.
The steam source of the gas of steam absorption test use is that the distilling apparatus by gravimetric method physical adsorption appearance provides, after the adsorbate of test use is purified by this distilling apparatus, for test provides high-purity steam.
By dual gas supply is set, this adsorption instrument both can have been done steam absorption test, can do again nitrogen absorption under low temperature test.Solve existing gravimetric method physical adsorption appearance and can only do steam absorption test, can not realize the problem of steam absorption test and nitrogen absorption under low temperature test simultaneously.
The gravimetric method physical adsorption appearance of prior art can only be done steam absorption test, can not realize steam absorption test and nitrogen absorption under low temperature test simultaneously.
Based on the existing problem of prior art, the gravimetric method physical adsorption appearance that the utility model provides, both can do steam absorption test, can do again nitrogen absorption under low temperature test.Source of the gas in this gravimetric method physical adsorption appearance partly comprises steam source of the gas and nitrogen source of the gas.
The steam source of the gas of steam absorption test use is that the distilling apparatus by gravimetric method physical adsorption appearance provides, after the adsorbate of test use is purified by this distilling apparatus, for test provides high-purity steam.
Nitrogen source of the gas partly has two effects, can be used as on the one hand the source of the gas of nitrogen absorption under low temperature test, for test provides high pure nitrogen; After system testing, in vacuum chamber, owing to vacuumizing in low pressure, in vacuum chamber, be filled with nitrogen on the other hand, make to recover normal pressure in vacuum chamber, be convenient to sample hose dismounting.
(4) can real-time testing saturated vapor pressure in this adsorption instrument test process:
Saturated vapor pressure (P0) is at certain temperature, the pressure that steam with the liquid state (or solid-state) of material of the same race in equilibrium state produces, it raises and to increase with temperature, and if its saturated vapor pressure is also different so for the purity difference of this material.Saturated vapor pressure (P0) is a critical nature of material, and its size depends on person's character and the temperature of material.
In physisorption test process, the numerical value of P/P0 is one group of significant data in whole specific surface and pore analysis process.The principal element that affects P0 has: the kind of adsorbate or purity are different, and P0 value is different; Environmental pressure changes, and P0 value also changes thereupon; Temperature variation also makes P0 value change thereupon.In a word, saturated vapor pressure (P0) is affected by environment in whole test process is changing always.So the real-time detection of saturated vapor pressure (P0) is the preferred embodiments overcoming the above problems, independently P0 detection analysis station is also indispensable.
The gravimetric method physical adsorption appearance of prior art is without P0 real-time testing function; conventionally the mode of obtaining P0 value has two kinds; adopt current atmospheric pressure to replace P0 or calculate P0 by the temperature that temperature sensor is tested thermostatic bath; these two kinds of methods are not all the devices of directly testing P0, and the P0 value error of obtaining is large.
In order to solve the existing problem of prior art, gravimetric method physical adsorption appearance of the present utility model provides a kind of device with real-time testing P0 with the distillation position A in distilling apparatus, the described testing station as saturated vapor pressure (P0) is the distillation position A in distilling apparatus, both can realize the real-time detection of P0, again can be as the purifying plant of adsorbate.In test process, the distillation cascade that adsorbate is housed is placed in A place, distillation position, is placed in thermostatic bath with the sample hose of test cell simultaneously, detects in real time P0.By this P0 proving installation, can directly record saturated vapor pressure P0 value, solve the existing problem of prior art, reduce test intermediate link, improve the accuracy of test result.
(5) effect of liquid nitrogen cold trap device:
In gravimetric method physical adsorption appearance vacuum of the present utility model, if water, organic reagent etc. are pumped in vacuum pump, will pollute vacuum pump, reduce vacuum tightness and the serviceable life of vacuum pump.By being set, liquid nitrogen cold trap device can remove the impurity that affects vacuum pump.In vacuum pump vacuum, enter the component such as organic steam, water vapour of cold-trap device, when its dividing potential drop higher than liquid nitrogen temperature under during the saturated vapor pressure of this component, this component will be condensed and stay in cold-trap device, effectively reduce these components and entered vacuum pump, reduced the pollution level of vacuum pump.
By liquid nitrogen cold trap device is set, the setting of liquid nitrogen cold trap device is arranged on to vacuum pump and connects on the pipeline between distilling apparatus and vacuum chamber, effectively removed the water in vacuum, organic steam etc. and entered vacuum pump, protection vacuum pump, gas clean-up.The effect of this liquid nitrogen cold trap device is mainly reflected in following several respects: the heating of (1) sample vacuumizes in preprocessing process, and the impurity such as the water in sample, through the condensation under liquid nitrogen temperature of liquid nitrogen cold trap device, are stayed in cold-trap; (2) adsorbate is in distilling apparatus vacuum distillation process, and the components such as adsorbate steam are through liquid nitrogen cold trap device, and condensation under liquid nitrogen temperature, stays in cold-trap; (3) sample is in desorption process, and the adsorbate steam being pumped is through liquid nitrogen cold trap device, and condensation under liquid nitrogen temperature, stays in cold-trap.Can know, the effect of liquid nitrogen cold trap device is not limited to above several respects.
In sum, the gravimetric method physical adsorption appearance of the utility model embodiment, is not increasing under the prerequisite of volume and cost, has realized the Multi-example test of single balance.Have advantages of simple in structure easy to operate.
The above; it is only preferably embodiment of the utility model; but protection domain of the present utility model is not limited to this; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; the variation that can expect easily or replacement, within all should being encompassed in protection domain of the present utility model.Therefore, protection domain of the present utility model should be as the criterion with the protection domain of claims.
Claims (8)
1. a gravimetric method physical adsorption appearance, is characterized in that, comprising:
Vacuum chamber, microbalance, Multi-example conversion equipment, vacuum pump and temperature sensor; Wherein,
The bottom of described vacuum chamber is provided with sample hose connector;
Described microbalance is arranged in described vacuum chamber, and described microbalance bottom is provided with a plurality of test bits, and described each test bit all can extend out to from the sample hose connector of described vacuum chamber in the sample hose of described vacuum chamber connection;
Described Multi-example conversion equipment is connected with described a plurality of test bits, can drive described a plurality of test bit conversion respectively to test bit position;
Described vacuum pump is communicated with in described vacuum chamber with valve by the road;
Described temperature sensor is arranged in described vacuum chamber, and its end of probe can be stretched out in the sample hose that is arranged on described vacuum chamber connection.
2. gravimetric method physical adsorption appearance according to claim 1, is characterized in that, described Multi-example conversion equipment comprises:
Conversion equipment, magnetic drive device and drive unit;
Described conversion equipment is arranged in described vacuum chamber and is connected with described a plurality of test bits;
Described drive unit is arranged on outside described vacuum chamber;
Described magnetic drive device is comprised of the first magnet and the second magnet, and described the first magnet is arranged in described vacuum chamber, is connected with described conversion equipment; Described the second magnet is arranged on outside described vacuum chamber, is connected with described drive unit; Described the first magnet is connected with the second magnet magnetic coupling.
3. gravimetric method physical adsorption appearance according to claim 1, is characterized in that, also comprises: the isothermal reaction of placing sample hose is bathed, and is arranged on described vacuum chamber below.
4. according to the gravimetric method physical adsorption appearance described in claim 1,2 or 3 any one, it is characterized in that, also comprise: distilling apparatus, distilling apparatus is communicated with in described vacuum chamber with valve by the road.
5. gravimetric method physical adsorption appearance according to claim 4, is characterized in that, described distilling apparatus is provided with two distillation positions that are connected with valve by pipeline.
6. according to the gravimetric method physical adsorption appearance described in claim 1,2 or 3 any one, it is characterized in that, also comprise: nitrogen source of the gas, is communicated with in described vacuum chamber with valve by the road.
7. according to the gravimetric method physical adsorption appearance described in claim 1,2,3 any one, it is characterized in that, also comprise: liquid nitrogen cold trap device, is arranged on the connecting line between described vacuum pump and described distilling apparatus and vacuum chamber.
8. gravimetric method physical adsorption appearance according to claim 1 and 2, is characterized in that, also comprises: control device, be arranged on outside described vacuum chamber, and be electrically connected to described microbalance and described temperature sensor respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420155921.0U CN203811496U (en) | 2014-04-01 | 2014-04-01 | Weight-method physical adsorption instrument |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420155921.0U CN203811496U (en) | 2014-04-01 | 2014-04-01 | Weight-method physical adsorption instrument |
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| CN203811496U true CN203811496U (en) | 2014-09-03 |
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| CN201420155921.0U Withdrawn - After Issue CN203811496U (en) | 2014-04-01 | 2014-04-01 | Weight-method physical adsorption instrument |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103868820A (en) * | 2014-04-01 | 2014-06-18 | 贝士德仪器科技(北京)有限公司 | Gravimetric-method physical absorption instrument |
| CN105043920A (en) * | 2015-07-10 | 2015-11-11 | 中国矿业大学 | Test method for measuring rock mass constant temperature adsorption and monitoring rock mass strain and instrument |
| CN105136602A (en) * | 2015-09-07 | 2015-12-09 | 宁夏出入境检验检疫局检验检疫综合技术中心 | Active carbon comprehensive gas adsorption instrument |
| CN112504929A (en) * | 2020-11-11 | 2021-03-16 | 四川大学 | Low-temperature vacuum degassing device for physical adsorption instrument and adsorption testing method thereof |
| CN112540022A (en) * | 2020-12-02 | 2021-03-23 | 中触媒新材料股份有限公司 | High-throughput evaluation device for catalyst and adsorbent and application method |
-
2014
- 2014-04-01 CN CN201420155921.0U patent/CN203811496U/en not_active Withdrawn - After Issue
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103868820A (en) * | 2014-04-01 | 2014-06-18 | 贝士德仪器科技(北京)有限公司 | Gravimetric-method physical absorption instrument |
| CN103868820B (en) * | 2014-04-01 | 2016-04-13 | 贝士德仪器科技(北京)有限公司 | Gravimetric method physical adsorption appearance |
| CN105043920A (en) * | 2015-07-10 | 2015-11-11 | 中国矿业大学 | Test method for measuring rock mass constant temperature adsorption and monitoring rock mass strain and instrument |
| CN105136602A (en) * | 2015-09-07 | 2015-12-09 | 宁夏出入境检验检疫局检验检疫综合技术中心 | Active carbon comprehensive gas adsorption instrument |
| CN105136602B (en) * | 2015-09-07 | 2020-08-04 | 宁夏出入境检验检疫局检验检疫综合技术中心 | Activated carbon comprehensive gas adsorption instrument |
| CN112504929A (en) * | 2020-11-11 | 2021-03-16 | 四川大学 | Low-temperature vacuum degassing device for physical adsorption instrument and adsorption testing method thereof |
| CN112540022A (en) * | 2020-12-02 | 2021-03-23 | 中触媒新材料股份有限公司 | High-throughput evaluation device for catalyst and adsorbent and application method |
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Granted publication date: 20140903 Effective date of abandoning: 20160413 |
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