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Porosity

Porosity Instruments

Any solid material that contains cavities, channels or interstices may be regarded as porous Porosity influences the physical exchanges and chemical reactivity of solids with gases and liquids. Porosity is of great industrial concern as it influences the behavior of gas adsorption and fluid flow within materials.

Examples of materials that porosity is of importance include catalysts, construction materials, ceramics, pharmaceutical products, metal powders, membranes, active components in batteries and fuel cells, and oil and gas bearing reservoirs.

With a large selection of gas sorption analyzers, along with mercury intrusion instruments, Micromeritics offers a product to fufill almost any need for porosity determinations.

Surface Area Analyzer

Micromeritics’ Gemini VII 2390 Series of surface area analyzers rapidly and reliably produces accurate and repeatable surface area and porosity results. Their low cost, speed, simplicity of use, reliability, and ruggedness have earned the Gemini a place in laboratories worldwide as an essential tool in research and quality control environments.


Unique Design

The secret of Gemini’s unique capabilities lies in the innovative use of sample and balance tubes. These tubes are identical in every aspect, including their thermal environment. The sample and reference reservoirs, like their associated tubes, are physically identical and are initially charged to the same pressure.

During an analysis, differential pressure between reservoirs is monitored. This common mode technique assures that any differential pressure is solely due to adsorption by the sample and not to factors that lead to variations in free space during an analysis.

  • The patented twin-tube design negates free-space errors introduced by thermal gradient variations or by initial mis-measurement of free space
  • Permits low surface area measurements without requiring krypton by essentially eliminating free-space error, the limiting factor in typical static volumetric systems
  • Accelerates delivery of the analysis gas because sample uptake controls the rate at which the gas is delivered to the sample. This results in a surface area analyzer that is as fast as the physics of adsorption allows
  • The use of a servo valve to control the rate of gas flow into the sample tube assures accurate attainment of target pressures without pressure overshoot
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TriStar II Plus - Analytical Versatility/High Throughput/Small Footprint

The TriStar II Plus is a an automated, three-station, surface area and porosity analyzer that delivers excellent performance and speed of analysis. With three available analysis ports, the TriStar II Plus provides high sample through-put and advanced data analysis features to the user. The unique stainless steel analysis manifold is corrosive resistant and designed for highly accurate gas management for confident and repeatable results.

TriStar II Plus

Advanced Hardware and Software Features

  • The unique stainless steel analysis manifold is corrosive resistant and designed for highly accurate gas management
  • Improved Dewar design provides more than 40 hours of continuous temperature control
  • Intuitive MicroActive software gives the user the ability to interactively evaluate isotherm data and reduces the time required to obtain surface area and porosity results
  • User-defined reporting options allow direct modeling
  • Powerful Python scripting language allows users to develop extensions to the standard report library available within the TriStar II Plus software application
  • An innovative dashboard monitors and provides convenient access to real-time instrument performance indicators and maintenance scheduling information
  • Capable of utilizing two isotherms (CO2 and N2) for calculating pore size diameter via NLDFT for micropore analyses of carbons
  • Improved ability to overlay files (up to 25) including mercury intrusion data with a file add and subtract feature
  • User selectable data ranges through the graphic interface allows direct modeling for BET, t-Plot, Langmuir, DFT interpretation, and much more
  • Report Options editor allows the user to define up to five reports with on-screen previews. Each report has the ability to possess multiple summary, tabular, and graphical information panes

Low Surface Area Measurement Option

TriStar II - Analytical Versatility/High Throughput/Small Footprint

The TriStar II Plus is a an automated, three-station, surface area and porosity analyzer that delivers excellent performance and speed of analysis. With three available analysis ports, the TriStar II Plus provides high sample through-put and advanced data analysis features to the user. The unique stainless steel analysis manifold is corrosive resistant and designed for highly accurate gas management for confident and repeatable results.


A Small Footprint Packed with Features

  • Three analysis ports can operate simultaneously and independently of one another. Three BET surface area measurements can be performed in less than 20 minutes.
  • The TriStar II accommodates the use of nitrogen, argon, carbon dioxide, and other non-corrosive gases such as butane, methane, or other light hydrocarbons.
  • A dedicated Po port is standard, allowing the measurement of saturation pressure on a continuous basis. Saturation pressure can be entered manually, measured continuously, or collected over the sample.
  • Incremental or fixed dosing routines prevent overshooting pressure points while minimizing analysis time.
  • Free space can be measured, calculated, or manually entered providing maximum flexibility in accommodating special sample types and emphasizing speed when needed. Helium is not required.

Low Surface Area Measurement Option

AutoPore V - Mercury Intrusion Porosimetry

The mercury porosimetry analysis technique is based on the intrusion of mercury into a porous structure under stringently controlled pressures. Besides offering speed, accuracy, and a wide measurement range, mercury porosimetry permits you to calculate numerous sample properties such as pore size distributions, total pore volume, total pore surface area, median pore diameter and sample densities (bulk and skeletal).

The AutoPore V Series Mercury Porosimeters can determine a broader pore size distribution more quickly and accurately than other methods. This instrument also features enhanced safety features and offers new data reduction and reporting choices that provide more information about pore geometry and the fluid transport characteristics of your material.

Operational Advantages

  • Ability to measure pore diameters from 0.003 to 1100 μm*
  • Controlled pressure can increase in increments as fine as 0.05 psi from 0.2 to 50 psia. This allows detailed data to be collected in the macropore region
  • High-resolution (sub-microliter) measurement of intrusion/extrusion volumes produces extraordinary precision allowing the Development of tighter sample specifications, improved production processes, and highquality research data
  • Operates in scanning and time- or rate-of-intrusion equilibrated modes
  • Real-time diagnostics provide knowledge of an issue before it becomes critical or impairs your analytical results
  • Collects extremely high-resolution data; better than 0.1 μL for mercury intrusion and extrusion volume
  • Improved linear motion for high-pressure chamber closure
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AutoPore IV - Mercury Intrusion Porosimetry

The mercury porosimetry analysis technique is based on the intrusion of mercury into a porous structure under stringently controlled pressures. Besides offering speed, accuracy, and a wide measurement range, mercury porosimetry permits you to calculate numerous sample properties such as pore size distributions, total pore volume, total pore surface area, median pore diameter and sample densities (bulk and skeletal).

The AutoPore V Series Mercury Porosimeters can determine a broader pore size distribution more quickly and accurately than other methods. This instrument also features enhanced safety features and offers new data reduction and reporting choices that provide more information about pore geometry and the fluid transport characteristics of your material.

Operational Advantages

  • Ability to measure pore diameters from 0.003 to 1100 μm*
  • Controlled pressure can increase in increments as fine as 0.05 psi from 0.2 to 50 psia. This allows detailed data to be collected in the macropore region
  • High-resolution (sub-microliter) measurement of intrusion/extrusion volumes produces extraordinary precision allowing the Development of tighter sample specifications, improved production processes, and highquality research data
  • Operates in scanning and time- or rate-of-intrusion equilibrated modes
  • Real-time diagnostics provide knowledge of an issue before it becomes critical or impairs your analytical results
  • Collects extremely high-resolution data; better than 0.1 μL for mercury intrusion and extrusion volume
  • Improved linear motion for high-pressure chamber closure

Design Advantages

ASAP 2020 Plus - Accelerated Surface Area and Porosimetry System

The Micromeritics ASAP 2020 Plus integrates a variety of automated gas sorption techniques into a single, but powerful, table-top instrument. The system is designed to provide high-quality surface area, porosity, chemisorption and physisorption isotherm data to materials analysis laboratories with ever-expanding analytical requirements. The ASAP 2020 Plus provides maximum versatility over a remarkable range of applications to meet your specific needs.

With more installed instruments in more countries for more users, the ASAP family of products have proven to be the instruments of choice worldwide when researchers require precise, high-quality gas adsorption data.


Instrument shown above has optional cold trap option installed.


Advanced Capabilities through Optional Configurations

The ASAP 2020 Plus can be configured to your specific needs with the option of upgrading at a later date as your analytical requirements change, maximizing the utility of this instrument and your investment.

Choose from low surface area, to heated vapor, to micropore capability. Add a cryostat, an external detector, or configure the unit for enhanced chemical resistance when working with aggressive vapors. The ASAP 2020 Plus permits one instrument to accommodate almost any surface characterization need in your lab.

Unique and Innovative Isothermal Jacket Cold Zone Control

Isothermal jackets are guaranteed for the life of the instrument and ensure a constant thermal profile along the full length of both the sample and saturation pressure (P °) tubes.

Design Versatility

  • Two independent vacuum systems permit simultaneous preparation of two samples while analyzing another. This maximizes your personnel productivity and your return on time invested
  • Continuous saturation pressure (P°) monitoring and unique Isothermal Jacket Cold Zone Control provide a stable thermal environment for both saturation pressure and adsorption. Spend time on results instead of controlling temperature variations
  • The ASAP 2020 Plus is configurable with many optional accessories to meet your specific analytical requirements.
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ASAP 2420 - Accelerated Surface Area and Porosimetry System

Micromeritics ASAP® 2420 Accelerated Surface Area and Porosimetry System uses the gas sorption technique to generate high-quality data for applications that require high performance/high sample throughput. Standard features include six independently operated analysis ports and a programmable and fully automated sample preparation module with twelve


High Performance - High Throughput

The ASAP 2420 system is designed to help today’s busy laboratories expand their work flow while providing highly-accurate and precise surface area and porosimetry data. High-performance and versatile analysis and sample preparation systems are included in the same instrument.

Advantages:

  • Fully automated analyses
  • High throughput with six independent analysis stations
  • Each analysis port has a dedicated analysis and P0 pressure transducer
  • Twelve independently controlled degas ports
  • Evacuation rate precisely regulated by a servo valve
  • BET surface area measurements in as little as 30 minutes
  • Dosing options of maximum volume increment or dosing over specified pressure ranges
  • Analysis temperature can be entered, calculated, or measured
  • Equilibration option allows user to specify equilibration times for different parts of the isotherm
  • Low surface area option with five independent analysis ports
  • Windows-driven software
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