Special furnaces

Catalyst test furnaces

Catalyst test furnace up to 1000 °C with FeCrAl resistance heater

The basic principle of this furnace has been developed for research in the field of catalysts and DPF (diesel particulate filter). The multi-stage heating system combines an efficient gas pre-heater and the reaction zone in one housing. This furnace provides a lot of technical capabilities for catalysts and PDF research:

  • Heating rates up to 50 K/min
  • Temperature measuring at the samples and in the gas flow
  • High purity because there are no metal parts in the furnace in the high temperature range
  • Possibility to feed highly reactive gases as cold gas directly into the sample compartment
  • Forced cooling to enable short cooling times
  • Proven system of sample holder and positioner
Technical data
Maximum temperature 1000 °C
Maximum continuous working temperature 950 °C
Gas temperature 850 °C
Gas flow up to 100 l/min
Length of the working space up to 1300 mm
Diameter of the working space 55 mm
Working position horizontal, vertical or swivel-mounted
Atmosphere in the working space ambient air; with working tube inert, oxidizing
Atmosphere in the heater ambient air

 

Glovebox Furnaces

Glovebox furnace up to 2000 °C with molybdenum resistance heater

Several types of HTM’s furnace units are suitable for applications in and at glove boxes. All these furnaces have one thing in common – they require water-cooled housings in order to minimize heat emission into the glovebox.
According to your request, we can manufacture furnaces that can be operated in a glove box, flange-mounted to a glove box or operated in locks. In addition we offer sets of vacuum-tight electrical and measuring feedthroughs, customized sample supports made of alumina ceramics (e.g. plates, trays, ampoules) and gas inlet/outlets.

Furnace type Heating element material Material of the heater support Max. temperatur
Glovebox LOBA FeCrAl Al2O3 fiber concrete 1300 °C
Glovebox LORA Mo Al2O3 fiber concrete 1750 °C
Glovebox LORA HT Mo Special ceramic material (HTM) 2000 °C

 

Gas Heaters and Afterburner Units

High performance gas heater for gas temperature up to 800 °C

The gas heater consists of a double-walled tube. The heating element made of FeCrAl resistance wire is fixed in the annular gap between both tube walls and heats the gas passing through the annular gap. The high electrical power (up to 6 kW) and high heat transfer (more than 70 %) can efficiently heat up gases up to a flow rate of
120 Nl/min.

Afterburner

Based on HTM’s tube furnaces, we offer electrically heated afterburners. The exhaust gas passes through ceramic fillers, an inserted meander tube or an annular gap and is heated up to its ignition temperature.
Another variant uses a furnace with glow plug.

 

Crystal growing units

Crystal growing furnacewith molybdenum resistance heater up to 1750 °C

Two usual crystal growing methods determine the customized furnace design: the Tammann-Stöber method
and the Bridgeman method.
Modifications of LORA type tube furnaces with molybdenum resistance wire are used as heater.

The precise temperature control at the transition between zones and the precise and very slow motor drive control enable temperature gradients up to 12 K/mm and movement speeds of 0.1 to
20 mm/h.

Special Furnaces

Catalyst test furnace

Catalyst test furnace

Glovebox furnace

Glovebox furnace

High performance gas heater

High performance gas heater

High performance gas heater

High performance gas heater

Afterburner

Afterburner

Crystal growing units

Crystal growing units

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