| Summary: | 碩士 === 國立成功大學 === 航空太空工程學系 === 84 === The purpose of this thesis research is to study the
effects of cat- alytic bed dimensions on the hydrazine
decomposition in contact with shell 405 catalyst.
The hydrazine flow rate was kept constant (4.54xE-3 kg/sec). Two
ca- talytic bed loads were studied (7.5g and 11g)with 3
different cylindrical shapes. Temperature and pressure at
various positions in the reactor were monitored and the
products of the action were on-line analyzed by gas chr-
omatograph. The extent of ammonia dissociation (X) were
determined with the N2 and NH3 concentrations contained in
the reaction products. Propul- sive parameters were
calculated by assuming ideal nozzle design with the
temperature, pressure, and X values measured during experiments.
The res- ults show:
(1) With a constant catalytic bed load, increasing of the length
of the bed increases the extent of ammonia dissociation.
(2) Although pressures of the reactor are not affected by
changing the cyl- indrical shape of the catalytic bed with
constant bed loads, temperature is decreased for longer
bed-length shapes. (3)
Keeping constant catalyst, pressure suppresses reactions at
relative low pressure (chemical reaction controlled).
However, pressure accelerates reactions at relative high
pressure (physical controlled).
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