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PARR Instr. Moline

High Pressure Reactors - Multiple Reactor System (series 5000)

Series 5000 Multiple Reactor System The Parr Series 5000 Multiple Reactor System has been designed to provide an integrated system for running applying the principles of high throughput experimentation
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Series 5000 Multiple Reactor System

The Parr Series 5000 Multiple Reactor System has been designed to provide an integrated system for running applying the principles of high throughput experimentation to reactions conducted at elevated temperatures and pressures.

The principle features of the instrument include :

  • Six reactors with internal stirring.
  • Operating pressures to 3000 psi.
  • Operating temperatures to 300 °C.
  • Individual temperature control.
  • Continuous pressure monitoring.
  • Computer control and data logging
  • Manifold systems for rapid turn around and to allow two different input gases.
  • Volumes and reactor geometry designed for three phase reactions.
  • Flexible Control Software.
  • Data Reduction Software.

Stirred Batch Reaction Vessel

This multiple reaction system has been designed around a vessel with 75mL total volume. This will accommodate between 15 and 40mL of liquid reactants which is close to the minimum volume appropriate for heterogeneous catalytic reactions. The reactors have been designed with the ideal reactor length to diameter ratio of 1.5.

The vessel valves and accessories are designed for maximum operating pressures up to 3000 psi at operating temperatures up to 300 °C.

Stirring System

All six vessels are stirred with a single magnetic stirrer assembly specifically designed and built for this application. The magnetic drives and fields are focused on the stirrer bars within each vessel. High strength compact magnets are used to provide coupling forces which will operate through the heaters and vessels used. The stirring speed of the stir bar is variable from 0-1200 rpm. All vessels will have the same stirring speed during a single run of the apparatus. A digital tachometer is optional to display stirring speeds. An optional computer controlled stirrer speed and display is also available.


Vessels are heated through the vessel walls and bottom of the vessel for rapid and uniform heating and temperature control. Each vessel is individually controlled. The 250 watt heaters used on each vessel produce heating rates of 15 °C per minute.

The heater assembly also includes all of the solid state relays and fuses necessary to handle the switching loads of the heaters.

Operating Modes

++ The Series 5000 Multiple Reaction System provides an apparatus for running up to six reactions in parallel to build a database for comparing and optimizing operating conditions.

++ The user can design experiments to:

Run all reactions at the same temperature and pressure while varying catalyst loading or reactant concentrations to optimize these parameters.

++ Run all reactors with identical loads varying pressures and a common temperature to study the effect of pressure on reactor rates.

Run individual reactors with individual loading and temperature and pressure to screen multiple options for activity.

++ We expect a comparison of the plots of pressure drop versus time within the reactors running under parallel conditions to be the most useful means of measuring reaction rates and comparing operating conditions. The internal thermocouple also provides a means of detecting parameters of exothermic reactions

Reactor Options

As Parr customers have come to expect with our line of laboratory sealed pressure reactor equipment, these reactors are offered with a number of options which permit the user to configure the system to their reactions and intended operating conditions, these options include:

1. O-Ring or Teflon® flat gasket seals.

Vessels are closed by simply tightening the screw cap down hand tight when using O-rings. The maximum operating temperature will depend upon the material of construction of the O-ring. A fluoroelastomer such as Viton ® is a widely used O-ring material which improves operating temperatures up to 225°C.

Temperatures up to 300°C are available with more expensive perfluoroelastomers such as Kalrez® material in addition to the temperature limits, careful consideration of chemical capability must also be given when selecting O-ring materials.

PTFE gaskets such as Dupont's Teflon® can be used temperatures in the 300°C range and offers virtually universal chemical compatability. Six cap screws are used to develop the sealing forces on the Teflon® gaskets used in this design.

2. Head Configuration

Each reaction vessel is equipped with an inlet valve, exhaust valve, safety rupture disc, and pressure transducer in addition to an internal thermocouple. The user can choose to have the valves, transducer and rupture disc mounted on gage block connected directly to the vessel head, or remotely mounted on the back panel and connected to the valve with a single quick coupling flexible high pressure hose. The head mounted design makes it possible to remove pressurized vessels from the heater/stirrer assembly or to prefill the vessels in a remote location. The remote panel mounted arrangement connects all of the pressure inlets/outlets to each vessel with a single flexible connection for the greatest ease of handling.

3. Materials of Construction

Type 316 stainless steel is the standard material of construction for both the vessel with its wetted parts and the gage block assemblies exposed to vapors. For investigators working with systems containing strong mineral acids or other more corrosive systems these vessels can be made of alloys, C-276, B-3, 400, 600 and 20Cb3 as well as titanium and zirconium.

4. Stirrer Configuration

Three choices are offered for the internal magnetic stir bar arrangement. The simplest is a loose stirring bar. The internal magnetic stirring bar can also be suspended from the cover of the vessel if there is a reason such as the form of the catalyst to avoid the bar spinning on the bottom of the vessel. The third option incorporates the stir bar into a bladed propeller for enhanced gas entrainment in the liquid phase.

5. Thermocouple Configuration

Thermocouples are mounted inside the vessel for the best temperature monitoring and control. These thermocouples are protected by stainless steel sheaths which can be mounted in the head of the vessel with a Swagelok® fitting or installed in a protective thermowell. The direct mounted thermocouples are permanently attached to the vessel head and provide the best temperature response for kinetic studies. Thermowells make it easy to install and remove thermocouples from the vessels, plus provide additional chemical and mechanical protection to the thermocouple and are the only option for vessels constructed of materials other than stainless steel.

6. Inlet Valve Type

Two input valves to these vessels are connected through an automatic check valve which permits the operator to fill all six vessels from either valve. Manual needle valves on each vessel are also available to users with unique operating requirements.

The 4870 Process Controller

The Series 5000 multiple reaction system is controlled by a dedicated Parr 4870 process controller. This controller is set up to provide

  • Temperature monitoring of all six reaction vessels.
  • PID Temperature control of each individual reactor.
  • Pressure monitoring of all six reaction vessels.
  • Data logging of temperature and pressure in each vessel.
  • Digital stirrer speed readout and manual control.
  • Optional computer control-stirrer speed and digital display.

In addition to its standard configuration, the controller can provide Ramp & Soak programming for individual reaction vessels, digital inputs and outputs for interlocks, alarms or other safety features, and additional analog and digital inputs and outputs to control flow meters or other accessories which might be added at some future date.

The users control station is a PC running any current Windows operating system. A simplified graphical users interface has been designed for the control and monitoring of the Series 5000 Multiple Reaction System. The PC is used strictly as the user interface and data logging module. All control actions are generated in the 4870 Process Controller (not the PC).

Details : please see attached pdf-file

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