High pressure gas adsorption instrumentIt is a professional analytical equipment used to accurately determine the gas adsorption performance of solid materials (such as activated carbon, molecular sieves, metal organic framework materials MOFs, porous polymers, etc.) under high pressure environment. It is widely used in materials science, energy storage (such as hydrogen/methane storage), environmental governance (such as CO ₂ capture), catalytic research and other fields. Its core function is to monitor the pressure, temperature and gas consumption changes during the adsorption process, obtain key data such as adsorption isotherms, adsorption kinetics, pore size distribution of materials, and provide scientific basis for material performance evaluation and application development.
From the perspective of working principle, high-pressure gas adsorbents are mainly designed based on the "volume method" or "weight method". The volumetric method calculates the amount of gas adsorbed by the material by accurately controlling and measuring the volume and pressure changes of the sample tank and reference tank, and is suitable for most gas adsorption tests at medium and high pressures (usually up to 1-30MPa); The weight rule uses a high-precision electronic balance to directly measure the weight change of the sample after adsorbing gas, which can avoid the error of dead volume calibration in the volume method and is more suitable for adsorption testing of ultra-high pressure (up to 100MPa) or low boiling point gases (such as hydrogen).
High pressure gas adsorption instrumentScope of application:
1、 Energy storage and utilization
Natural gas (ANG) storage:
Application: Evaluate the adsorption capacity of porous materials such as activated carbon, metal organic frameworks (MOFs), covalent organic frameworks (COFs), zeolites, etc. for methane (CH4) at pressures ranging from 35-200 bar.
Purpose: To develop an adsorption based natural gas (ANG) system that can safely and efficiently store methane at lower pressures (compared to CNG's 200-250 bar) for use in natural gas vehicles, improving safety and storage density.
Hydrogen (H ₂) storage:
Application: Study the adsorption isotherms of new porous materials (such as MOFs, COFs, carbon nanomaterials) for hydrogen at 1-100 bar (or even higher) and low temperature (77K) or room temperature.
Purpose: To explore solid-state hydrogen storage technologies that surpass traditional high-pressure gas (350-700 bar) and low-temperature liquid (-253 ° C) storage, seek materials with higher volume and weight hydrogen storage density, and promote the development of hydrogen fuel cell vehicles.
Research on Shale Gas and Coalbed Methane (CBM):
Application: Measurement of high-pressure adsorption isotherms (up to tens of MPa) of methane in natural porous media such as shale and coal rock.
Purpose:
Evaluate the original gas content and recoverable reserves of shale gas/coalbed methane reservoirs.
Study the adsorption/desorption mechanism, optimize hydraulic fracturing and drainage processes.
Predict the production and attenuation patterns of gas wells.
2、 Carbon Capture, Utilization, and Storage (CCUS)
Carbon capture after combustion:
Application: Test the selective adsorption capacity of porous materials (such as amine functionalized materials, MOFs, zeolites, activated carbon) for carbon dioxide (CO ₂) at 0.1-1 bar (flue gas partial pressure) to medium high pressure.
Purpose: To screen and develop efficient, low-cost, and renewable adsorbents for capturing CO ₂ from flue gas of coal-fired/gas-fired power plants.
Direct Air Capture (DAC):
Application: Study the adsorption performance of materials at extremely low CO ₂ partial pressures (~0.04%). Although the pressure is not high, the high sensitivity and precise control ability of high-pressure adsorbents are equally applicable.
Objective: To develop a technology that can directly capture CO ₂ from the atmosphere.
Geological storage assessment:
Application: Measure the adsorption capacity of supercritical CO ₂ in underground saline water layers, depleted oil and gas reservoirs, or coal seam rocks.
Purpose: To evaluate the safety and long-term stability of CO ₂ geological storage, and predict the migration and retention (adsorption) behavior of CO ₂ in geological formations.
3、 Advanced Material Research and Characterization
Development of new porous materials:
Application: Comprehensive high-pressure gas adsorption characterization of newly synthesized MOFs, COFs, porous polymers, graded porous carbon and other materials (CH ₄, H ₂, CO ₂, N ₂, etc.).
Objective: To evaluate its potential as an energy gas storage or separation material and establish a structure-activity relationship between material structure (pore size, specific surface area) and adsorption performance.
Material performance optimization:
Application: Through high-pressure adsorption testing, compare the effects of different synthesis methods and post-treatment (such as activation, doping, functionalization) on the adsorption performance of materials.
Purpose: To guide the structural optimization of materials, improve their adsorption capacity, selectivity, and cycling stability.
4、 Industrial gas separation and purification
Pressure Swing Adsorption (PSA) and Vacuum Pressure Swing Adsorption (VPSA):
Application: Obtain adsorption isotherms and selectivity data of key gas pairs (such as CO ₂/N ₂, CO ₂/CH ₄, CH ₄/N ₂, H ₂/CH ₄) under high pressure.
Purpose:
Screening and designing efficient adsorbents.
Provide core thermodynamic data for simulating and optimizing PSA/VPSA processes, predicting separation efficiency and energy consumption.
5、 Basic scientific research
Study on adsorption mechanism:
Application: Measure adsorption isotherms over a wide range of pressure and temperature, and calculate adsorption heat, microporous filling energy, etc. by combining model fitting (such as D-A, D-R equations).
Objective: To gain a deeper understanding of the interaction mechanism between gas molecules and porous material surfaces, primarily through physical adsorption.
Supercritical fluid adsorption:
Application: Study the adsorption behavior of gases in a supercritical state above the critical temperature (such as CO ₂ above 31 ° C).
Objective: To understand the phase behavior and density enhancement effect of supercritical fluids in confined spaces (micropores), which is of great significance for CCS and supercritical extraction.
6、 Other applications
Inert gas adsorption: Using high-pressure Ar or Kr adsorption at low temperatures (87K, 77K), combined with advanced analytical models (such as NLDFT, QSDFT), can accurately characterize the microporous structure of materials (<2 nm), which is difficult to achieve with conventional atmospheric pressure N ₂ adsorption.
Safety assessment: Study the adsorption/desorption kinetics of high-pressure gases in materials, evaluate the safety and response speed of gas storage systems.