AutoChem II 2920

The AutoChem II 2920 is a fully automated chemisorption analyzer that can provide your laboratory with the ability to conduct a comprehensive array of highly precise studies of chemical adsorption and temperature-programmed reactions. With this single instrument, you can acquire valuable information about the physical properties of your catalyst, catalyst support, or other materials. It can determine catalytic properties such as percent of metal dispersion, active metal surface area, acid strength, surface acidity, distribution of strength of active sites, BET surface area, and more. The AutoChem II 2920 performs pulse chemisorption, temperature-programmed reduction (TPR), desorption (TPD), oxidation (TPO), and reaction analyses and does it automatically.

Description

AutoChem II 2920

Automated Catalyst Characterization System 

A catalyst characterization laboratory enclosed in one cabinet.

The AutoChem II 2920 is a fully automated chemisorption analyzer that can provide your laboratory with the ability to conduct a comprehensive array of highly precise studies of chemical adsorption and temperature-programmed reactions. With this single instrument, you can acquire valuable information about the physical properties of your catalyst, catalyst support, or other materials. It can determine catalytic properties such as percent of metal dispersion, active metal surface area, acid strength, surface acidity, distribution of strength of active sites, BET surface area, and more. The AutoChem II 2920 performs pulse chemisorption, temperature-programmed reduction (TPR), desorption (TPD), oxidation (TPO), and reaction analyses and does it automatically.

This unit is also available in a Corrosion Resistant version.

Features

Wide Variety of Features and Benefits

Optimum design and efficient utilization of catalysts require a thorough understanding of the surface structure and surface chemistry of the catalytic material. Chemical adsorption (chemisorption) analyses can provide much of the information needed to evaluate catalyst materials in the design and production phases, as well as after a period of use. The chemical adsorption isotherm reveals information about the active surface of a material and has been employed for many years as a standard analytical tool for the evaluation of catalysts. In addition, temperature-programmed reaction techniques have emerged as an indispensable companion to chemisorption isotherm analyses in many areas of industry and research.

  • Four internal temperature-controlled zones can be heated independently up to 150 °C. This prevents condensation in the flow path and allows studies to be performed with vapors.
  • Low internal plumbing volume assures high resolution, fast detector response, and reduces error when calculating gas volumes.
  • Highly sensitive linear thermal conductivity detector (TCD) assures the calibration volume remains constant over the full range of peak amplitudes so the area under the peak is directly proportional to the volume of gas reacted.
  • Four high-precision mass flow controllers provide extremely accurate, programmable gas control. This assures a stable baseline and accurate determination of gas volumes.
  • Corrosion-resistant detector filaments are compatible with most destructive gases and reduce the likelihood of filament oxidation.
  • Clamshell furnace can heat the quartz sample reactor to 1100 °C. Any number of ramp rates and sequences facilitate customized experiments. The KwikCool feature cools the furnace temperature rapidly down to near ambient, reducing analysis time and increasing throughput.
  • Four gas inlets each for the preparation, carrier, and loop gases permit four-gas sequential experiments, such as TPR/TPO cycles.
  • Mass spectrometer port and software integration allows virtually simultaneous detection on both the thermal conductivity detector and mass spectrometer.
  • Optional Vapor Generator permits analysis using vaporized liquids in an inert carrier stream.
  • Optional CryoCooler enables the start of an analysis at sub-ambient temperature

 

Hardware Advantages

The AutoChem II features stainless-steel construction, fully automated flow and pressure control, an embedded microprocessor with real-time control, and an intuitive graphical user interface for reactor control. A temperature-controlled, stainless-steel flow path provides an inert and stable operating environment, and reduces the potential for condensation in the flow path. The embedded microprocessor allows the AutoChem II to operate with real-time control; this provides enhanced stability by separating the AutoChem control from a PC or workstation.

 

  • Twelve gas inlets (4 each for prep, carrier, and analysis) provide the capability to perform sequential experiments such as TPR/TPO cycle experiments.
  • Equipped with four high-precision, independently calibrated mass flow controllers providing extremely accurate, programmable gas control. The ability to control gas flow with accuracy assures a stable baseline and accurate determination of gas volumes.
  • Analysis gas may be introduced to the carrier stream by a precision automated loop. A calibrated, conveniently located septum is also provided through which analysis gas can be injected by means of a calibrated syringe.
  • Thermal conductivity detector (TCD) is capable of detecting minute differences in the concentration of gases flowing into and out of the sample reactor. Its corrosion-resistant filaments are operated at constant temperature to prevent thermal runaway, which can destroy filaments in other systems.
  • A clamshell furnace can heat the quartz sample reactor up to 1100 °C. The AutoChem II 2920 permits any number of ramp rates and sequences to facilitate customized experiments. The included KwikCool feature permits cooling the furnace temperature rapidly down to near ambient, reducing analysis time and increasing throughput. With the CryoCooler option, analysis temperatures can be ramped over the range of -100 °C to 1100 °C.
  • Four internal temperature-controlled zones can be heated independently of each other to as much as 150 °C. This prevents condensation in the flow path and allows studies to be performed with vapors.
  • The extremely low volume of the internal plumbing minimizes peak spreading and significantly enhances peak resolution. Furthermore, it reduces the time lag between the sample reactions and the corresponding detector response.

Option 

 

Cirrus 2 Quadrupole Mass Spectrometer

Atmospheric Pressure Gas Monitoring

Cirrus 2 offers the versatility of state-of-the-art Microvision 2 quadrupole mass spectrometry in a convenient bench-top configuration. Incorporating an Ethernet interface, Cirrus 2 systems may be operated from a local PC or connected directly into an Ethernet network hub or switch for remote operation.

Cirrus 2 systems are ideal for the on-line monitoring and analysis of gases and gas mixtures including trace contaminants in process gases; solvent vapors; hydrocarbons; atmospheric and inorganic gas species (including corrosives); freons and noble gases.

Gas compositions can be tracked over a wide dynamic range (ppb to percentage levels) with a speed of up to 250 data points per second. The heated silica capillary inlet ensures a rapid response to changes in gas composition.

Cirrus 2 systems are manufactured from quality, field proven materials, which maximize reliability and uptime. The systems are easy to install and operate and feature automatic start-up and shut-down routines as well as built-in vacuum and heater interlocking for system protection.

Particular consideration has been paid to ease of service and maintenance. Cirrus 2 has been designed to allow easy access to the vacuum system, pump and inlet components for preventative maintenance and the replacement of consumable items (ion source filaments, capillary etc.).

The Cirrus 2 system enables the AutoChem II 2920 and AutoChem 2950 HP to function as multi-component microreactors. Cirrus 2 software includes Process Eye™ Professional which controls analyzer data collection and monitors real-time data and analyzer status. A Recipe wizard helps create and configure analysis conditions. The Micromeritics/Cirrus interface software runs inside Process Eye Professional and is accessed via its own menu. This interface enables the user to control the analyzer via recipes which can also be saved for future use. Micromeritics has included preset parameters in the software, enabling you to create Peak Jump recipes with just a few keystrokes. The interface allows the user to collect data automatically from the AutoChem, customize Peak Jump recipes, access standard operations, calibrate detectors, and scale the AutoChem sample thermocouple signal.

 

Data integration with AutoChem II 2920 and AutoChem 2950 HP

MS data may be analyzed using the MIcromeritics Peak Editor that allows signal deconvoution (peak fitting), signal integration, and smoothing.
The AutoChem software may be used to create MS calibrations and convert raw signals to quantitative analyses.
Data may be used directly in AutoChem characterization reports: dispersion, active area, kinetics, crystallite size.

Features & Benefits
  • Monitors multiple gas species over a wide dynamic range of composition at atmospheric pressure
  • Compact, modular design for ease of serviceability and maintenance
  • Direct Ethernet interface - fully network compatible
  • Recipe driven Process Eye™ Professional software for automated operation and calibration
  • Fast response, silica capillary inlet heated to 150° C

For sampling different gas conditions, inlet options available are:

  • Stainless steel capillary
  • Low flow capillaries
  • Multi-stream inlets
  • Automated variable pressure inlet