תיאור
Series 5400 5mL-1000mL Continuous Flow Tubular
Tubular reactors are used in a continuous flow
mode with reagents flowing in and products being
removed. They can be the simplest of all reactor
designs. Tubular reactors are often referred to by
a variety of names:
Tubular reactors can have a single wall and be
heated with an external electric furnace or they can
be jacketed for heating or cooling with a circulating
heat transfer fluid. External furnaces are typically
rigid, split-tube heaters. Tubular reactors are used
in a variety of industries:
– Petroleum
– Petrochemical
– Polymer
– Pharmaceutical
– Waste Treatment
– Specialty Chemical
– Alternative Energy
Care must be taken to size these controllers for
the specific gas, flow rate range, and maximum
pressure of operation. A mass flow controller needs
a power supply and read-out device, as well as a
means of introducing the desired set point.
When ordering mass flow controllers, you will need
to specify:
1. Type of gas to be metered
(e.g. N2, H2, CH4)
2. Maximum operating pressure
of the gas (100 or 300 bar)
3. Maximum flow rate range
in standard cc’s per minute
(sccm)
4. Pressure for calibration of the
instrument
Mass flow controllers are
available for use to 1500 psi and
to 4500 psi. Considerable savings
can be obtained if the mass flow
controller is to be used only to 1500 psi.
The schematic at right depicts the installation of a
mass flow controller for the introduction of gas to a
continuous-flow reaction system. Such installations
are enhanced with the addition of a by-pass valve
for rapid filling or flushing.
A purge line can also be added. It is typically
used for feeding nitrogen or helium to remove air
before reaction or to remove reactive gases before
opening the reactor at the end of a run. The purge
line includes a shut-off valve, filter, metering valve,
and a reverse-flow check valve.
Shut-off valves can be automated when using a
4871 Control system.
