CHEMISORPTION ANALYZERS: THE AMI CHEMI FAMILY

The AMI-300 is a chemisorption analyzer and is the “flagship” of the AMI Family.  It is the technical basis for all of the remaining models.  All of the AMI instruments feature a stand-alone PC that can be tasked to perform other functions in the laboratory besides controlling the AMI instrument.  Likewise, all of the AMI instruments feature dependable, LabVIEW-based control software.  All of the AMI instruments are designed for performing the traditional catalyst testing experiments on an unattended basis.  However, if your research requires increased throughput with the same degree of automation as the AMI-300, there are two, three, five and eight workstation versions of the AMI-300 available. 

If your needs fall more toward reaction experiments such as steam reforming, water-gas shift, auto thermal reforming, or preferential oxidation reactions, the AMI-300R is available with one or more liquid pumps and vaporizers to efficiently study those kinds of reactions.  If you need to study reactions under pressure, the AMI-300R HP can be operated with pressures up to 100 bar (and higher on a custom instrument).

If your needs fall more toward a less costly line of instruments, the AMI-300Lite, and the three, five, and eight station versions provide all of the traditional catalyst testing capabilities on a budget-conscious basis.

If your interests take you to techniques where it is possible to learn about the nature of the sites, the type of adsorption, or whether there exist multiple types of sites, the AMI-300ir would suit your needs.  

Please review the AMI Family Map to see what instrument meets your needs.  You may view the AMI Family Brochure here.  Below is a technical description of the AMI-300:

The AMI-300 is the latest generation automated chemisorption analysis instrument offered by Altamira Instruments. Developed by and for catalyst researchers, it and its predecessors, the AMI-1 the AMI-100, and the AMI-200, were first in the industry to offer a fully automated system capable of performing the major dynamic techniques required for fully characterizing a catalyst. The AMI-300 utilizes our proven technology for performing the following dynamic procedures:

• Temperature programmed desorption (TPD) .
• Temperature programmed reduction/oxidation (TPR/O)
• Temperature programmed reaction (TPRx)
• Pulse chemisorption
• Catalyst treatment
• Dynamic BET surface area
• Pulse calibration

Up to 99 procedures can be linked together consecutively to provide a complete characterization experiment. All experimental procedures can be designed and stored for easy retrieval.

• High-precision electronic mass flow controllers which ensure a stable baseline with changing temperatures and also ensure quality of data
• Use of 1/16" stainless steel tubing to minimize dead volume and reduce peak spreading.
• A clamshell furnace with adjustable mounting to ease insertion and removal of samples.
• Capability of heating catalyst samples to 1200°C with linear temperature ramps from 1°C to 50°C per minute. (Higher and lower ramp rates are also available).   
• A sub-ambient option which provides the capability to operate linearly, between  -130°C and 1200°C.
• Automatic air-cooling of the furnace which is provided to speed the time between experiments.
• A Universal Temperature Zone which controls the temperature of all valves and lines downstream of the reactor. The temperature of this zone is controlled by the software and serves to prevent both condensation and retention of the adsorbate in valves and lines upstream of the detector.
• A saturator is provided as an option to suffuse the treatment gas with liquid vapors. The temperature of the saturator is controlled by the software. In applications where condensation of liquid vapors in the line between the saturator and the Universal Temperature Zone is a concern, a reflux heater is available to ensure that no condensation takes place.
• A highly linear Thermal Conductivity Detector (TCD) is standard. The resolution of the TCD is operator defined, and is controlled by the software.
• A choice of TCD filaments is offered to maximize sensitivity, and chemical compatibility of the instrument

The AMI-300 comes standard with gas blending capabilities, obviating any need to purchase expensive gas blends to conduct experiments such as TPR or TPO. The AMI-300 includes an auxiliary gas line by means of which a gas can be mixed with the carrier gas to provide custom-blended gases. An in-line static gas mixer assures homogeneity of the resulting blend. The gas blending capability also facilitates the use of the AMI-300 as a gas-phase, atmospheric reactor.

• Standard Catalyst Charge: 0.1 – 1.0 grams (can be increased with custom sample tubes)
• Temperature Range: -130°C to +1200°C with Subambient Option
• 50°C/minute standard (Other Ramp Rates Available)
• Operating Pressure: Atmospheric
• Gas Flow Rates: 5 to 50 sccm (Others Available)
• Reactor Types: Quartz U-tubes, Bubble Tubes, Monolith Tubes (up to 1" diameter)
• Primary Detectors: 4 filament TCD with choice of material (W, Au/W)
• Materials of Construction: Flow path: 316 stainless steel
• Dimensions: 64 cm (W). 64 cm (H), 64 cm (D)
• Weight: approximately 55 kg (120 lbs)
• Power Requirements: 110-120 or 220-240 Volts, single phase, 50 or 60 Hz. ~20 amp service