ASAP 2020 – Physisorption Analyzer

Micromeritics

High Performance in a Compact Footprint

Accurate and precise surface area and porosimetry measurements are essential to the determination of the effectiveness and quality of a wide variety of materials. The Micromeritics ASAP 2020 integrates multiple gas sorption techniques into a single, convenient table top instrument.

Features

Intelligent Design

The ASAP 2020 provides maximum versatility over a remarkable range of applications. Sophisticated system features include:

  • Two independent vacuum systems allowing simultaneous preparation of two samples and analysis of another
  • A two-station intelligent degas system or fully automated degassing with precisely controlled heating profiles
  • Intuitive and powerful Windows-based software that includes easy-to-use interactive Wizards™ to help guide you through even the most challenging experiments
  • A highly flexible and interactive reporting system that includes an extremely versatile graphic user interface allowing custom presentation of results.

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ASAP 2020 Configurations and Options

The standard ASAP 2020 system can be readily upgraded to perform a full range of surface characterization analyses. All options, including the degas and chemisorption systems, are designed to be integrated into the ASAP 2020 cabinet and require no additional bench space.

  • High Vac Option: When equipped with a 10-mmHg transducer and a high vacuum pump, the standard system becomes a High Vac system. This system provides the low-pressure capability and pressure-measurement resolution required for low surface area analyses using krypton as the adsorptive.
  • Micropore Option: The High Vac system upgraded with a 1-mmHg transducer becomes the powerful Micropore system. The Micropore system delivers accurate porosity data on pores between 0.35 and 3 nanometers and provides a comprehensive selection of micropore reports:
    • Dubinin-Radushkevich (D-R)
    • Dubinin-Astakhov (D-A)
    • Horvath-Kawazoe (H-K)
    • H-K with Cheng & Yang correction for slit-shaped pores
    • H-K with Saito & Foley model for cylindrical pores
  • Chemisorption Option: A chemisorption upgrade added to a High Vac or Micropore system provides surface characterization analysis of catalytic materials. An integrated mass spectrometer port is included. Reported data include:
    • Active metal area
    • Heat of chemical adsorption
    • Crystallite size
    • Strong and weak chemisorption
    • Active metal dispersion
  • Enhanced Chemical Resistance Option: The ASAP 2020’s stainless-steel manifold is available with chemically resistant Kalrez seals to support analyses using aggressive gases or vapors as the adsorptive. This option is ideal for experiments with unsaturated hydrocarbons such as benzene and toluene.
  • Vapor Option – Water Vapor Adsorption Option: Studies using water vapor as the adsorptive can also be performed on any ASAP 2020 with the optional water vapor accessory. Vapor Option – Water Vapor Option Flyer
  • ASAP 2020 HD*: Wider pressure measurement capabilities for the ASAP 2020 HD allow isotherm measurements to start an order of magnitude lower in pressure than previous ASAP instruments. This new low pressure capability provides more resolution and new options for materials with micropores like metal organic frameworks, activated carbons, and zeolites *Current ASAP 2020 users can also benefit from these new capabilities by upgrading their instrument to the new HD standard.

 

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ASAP 2020 Applications

A World of Applications The fully automated ASAP 2020 is an essential tool for providing surface area and porosity measurements on a wide variety of materials. Here are just a few of the most commonly used applications:

  • Pharmaceuticals – Surface area and porosity play major roles in the ability to purify, process, blend, tablet, and package a drug substance. The useful shelf life and the dissolution rate (governing how rapidly the medicine becomes available to the body) depend upon the surface area and porosity of the material.
  • Ceramics – Surface area and porosity information helps to determine curing and bonding procedures, ensure adequate green strength, and produce a final product of desired strength, texture, appearance, and density.
  • Activated Carbons – Surface area and porosity must be optimized within narrow ranges to properly accomplish gasoline vapor recovery in automobiles, solvent recovery in painting operations, or pollution controls in wastewater management.
  • Carbon Black – Tire manufacturers have discovered that the surface area of carbons affects the wear lifetime, traction, and performance of tires. The intended use of the tire, or the type of vehicle on which it will be placed, determines whether low or high surface area carbons will be required.
  • Paints and Coatings – The surface area of the pigment or filler influences the gloss, texture, color, color saturation, brightness, solids content, and film adhesion properties. Porosity can control application properties such as fluidity, drying or setting time, and film thickness.

 

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Hardware Versatility

The ASAP 2020 uses two independent vacuum systems, one for sample analysis and one for sample preparation. This allows preparation and analysis to proceed concurrently without the inherent delay found in single vacuum system analyzers that must share a pump. Moreover, independent systems completely eliminate the possibility of cross-contamination between the degas and analysis manifolds.

A two-station intelligent degas system option provides fully automated degassing with controlled heating time profiles. The degas treatment information is saved as part of the sample file, included in analysis reports, and can be conveniently copied and reused for other samples to ensure repeatability and reproducibility.

Precision machined from a monolithic block of stainless steel, ASAP 2020 stainless-steel, temperature-monitored analysis manifolds are designed for optimal internal volumes and superior vacuum performance. These optimized manifolds, in combination with temperature monitoring, ensure highly accurate measurements of sorbed gas volumes.

The standard ASAP 2020 manifold uses high-performance polymer seals combined with the superb properties of stainless steel. Many types of saturated hydro carbon vapors and mild organic vapors can be used as adsorptives in addition to common gases such as N2, Ar, Kr, CO, CO2, H2, and He. High-performance manifolds using specialized sealing materials are available for use with more aggressive gases and vapors.

Long-duration Dewars combined with Micromeritics’ patented Isothermal Jackets which are guaranteed against failure for the life of the instrument; assure a constant thermal profile along the full length of both the sample and the saturation pressure (P0) tubes throughout extended analyses.

The use of a single high-quality, stable, low-noise transducersystem for all measurements eliminates the possibility of progressive offset and drift between separate transducers covering the same range.

The optional oil-free dry vacuum system is available for systems that utilize a mass spectrometer.

The ASAP 2020 comes equipped with six analysis gas inlets for Physisorption experiments. A vapor inlet and helium inlet for free-space are also included. Six additional inlets are available with the Chemisorption option. This provides greater flexibility and allows for automated selection of pretreatment, backfill, and analysis gases. This eliminates the need for external gas-select manifolds or for the removal of one gas to make room for another.

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ASAP 2020 Software and Reporting

ASAP 2020 Software Features include easy-to-use Windows Interface that includes Wizards and applications to help plan, launch, and control the analysis. You can collect, organize, archive and reduce raw data, and store the standardized sample information and analysi conditions for easy access during later applications. Finished reports may be generated to csreen, paper, or data transfer channels. Features include cut-and-paste graphics, scalable-and-editable graphs, and customizable reports.

Additional capabilities include:

  • Degas temperature profiles and treatment time data are integrated with the sample file for future reference and verification of SOP compliance.
  • The Instrument Schematic screen displays the instrument’s current operating status, including the real-time isotherm, and allows the operator to assume manual control of the instrument if desired.
  • The patented Smart Dosing™ routine actually learns about the sample’s potential to adsorb gas and adjusts the adsorptive doses accordingly. This helps prevent over-dosing the sample and obscuring porosity information.
  • One computer can control two Micromeritics ASAP analyzers of the same or different model making efficient use of valuable lab space. Other types of Micromeritics instruments can also be connected.
  • The graphics module can display up to nine overlaid graphs for easy comparison of different samples or for comparison of different data reduction techniques applied to the same sample.
  • Exportable data tables provide for merging and comparing data from other sources in a unified single spreadsheet file
  • Three modes of gas dosing routines provide effective choices to ensure maximum speed with full accuracy for samples with widely differing isotherm shapes.
  • The user can enter any reference isotherm into the system by way of a data file or table. This isotherm can be used in place of the pre-programmed thickness curves when calculating thickness for t-Plots, Alpha-S Plots, and BJH pore size distribution. The reference isotherm can also be overlaid with other plotted data for comparisons.

Analyses and Reports
The ASAP 2020 includes powerful data reduction software to provide a variety of easy-to-interpret report options. This allows tremendous flexibility in the selection of analysis constants to best fit your specific application. All ASAP 2020 models have the capability to collect data over a prescribed segment of the pressure range, or to perform adsorption and desorption analyses over the entire pressure range, providing extensive surface area and porosity information.

  1. DFT Plus
    DFT (Density Functional Theory) uses the entire experimental isotherm to determine both micro-porosity and meso-porosity as a continuous distribution of pore volume with respect to pore size. Micromeritics’ exclusive DFT Plus for Windows calculates pore volume, surface energy, and surface area distribution. An independent library provides models for different pore shapes. As new models are created, the library can be easily updated without having to reload the DFT Plus program.
    Repetitive Isotherm Cycling (Optional)
    This option allows you to perform up to 500 adsorption/desorption cycles over user-defined ranges along the adsorption isotherm.
  2. Optional Rate of Adsorption (ROA)
    Rate of physical adsorption capability is available to measure the rate at which various gases adsorb to the surface of porous materials at selected target pressures. This information is valuable in guaging how accessible the adsorbing surface is and how energetically the surface collects and holds gas.
  3. DataMaster™
    DataMaster is an off-line data reduction package that can be used with data collected from most Micromeritics gas adsorption instruments. It provides most of the data reduction techniques found in the ASAP 2020 operating program but gives you the added advantage of being able to use it on computers other than the one controlling the instrument. Now you can easily merge data or generate overlay plots from different Micromeritics gas adsorption instruments

All ASAP 2020 Models include :

  • Single- and Multi-point BET (Brunauer, Emmett, and Teller) surface area
  • Langmuir surface area
  • Temkin and Freundlich isotherm analyses
  • Pore volume and pore area distributions in the mesopore and macropore ranges by the BJH (Barrett, Joyner, and Halenda) method using a variety of thickness equations including a user-defined, standard isotherm
  • Pore volume and total pore volume in a user-defined pore size range
  • Micropore distribution by the MP method and total micropore volume by the t-Plot and Plot methods
  • f-Ratio plots that illustrate the difference between theoretical and experimental isotherm data
  • Heat of Adsorption
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