ChemBET PULSAR™ TPR/TPD

Chemisorption - Physisorption Analyzer

The PULSAR combines affordability and automation and offers compact, bench-top catalyst characterization using automated flow methods of analysis.

The PULSAR builds on the reputation of the existing Quantachrome ChemBET - combining its affordability with the automation of the Autosorb-1C/TCD analyzer, and represents the very best value in catalyst characterization using automated flow methods of analysis, including pulse titration.

Fully automated analysis sequences are programmed using the new TPRWin PC software. Titrations for metal area and dispersion determination use a new automatic loop injector and automatic gas switching. Furnace temperature ramping provides for temperature programmed methods (TPR, TPD, TPO, TPSR-known collectively as TPX) and sample preparation, both including rapid furnace cooling using forced air for higher throughput.

New multiple TPX measurements can be automated into a single sequence. The PULSAR retains the ChemBET's proven TCD detector - both oxidation AND ammonia resistant, with stable current control for baseline stability and reproducible signals. Plumbed in stainless-steel for maximum chemical compatibility, the PULSAR is ideal for use with a wide-range of gases. High-temperature quartz sample cells are standard, as is the in-cell thermocouple providing accurate sample temperature measurements.

Options include a Quadrupole Mass Spectrometer, and an external digital gas blender/mass flow controller.

The resulting data are used to:

• Confirm or predict catalyst activity
• Determine optimal catalyst preparation conditions for industrial use
• Measure efficiency of regeneration of used catalysts
• Quickly screen experimental catalysts
• Calculate activation energies for a given reaction
• Determine relative acid strengths

Sub-Ambient accessory

The accessory kit comprises a heat exchanger and special jacketed cell. Dry nitrogen gas passes through the heat exchanger in its own LN2 dewar and goes on to cool the sample cell. This inexpensive device is supplied complete with gas input line, flow regulator valve, stainless steel funnel (for filling LN2), dual thermocouple and furnace cover, in addition to the cell and dewar. Starting temperatures below -100 deg C are possible.

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