APLIKASI SPRAY DRYER UNTUK PENGERINGAN LARUTAN GARAM AMONIUM PERKLORAT SEBAGAI BAHAN PROPELAN
ABSTRACT: Ammonium perchlorate
( AP ) is an inorganic oxidizer that is
widely used as a component of rocket propellants. In this research, spray
drying was used to produce crystalline AP from
its saturated solution. A method of spray dryer is viscous liquid or
paste contacted with thot air co-currently. Fluid is passed at a nozzle and
came out into the form of fine granules ( droplet . Drying method was conducted
to run4 variables change, such as the inlet temperature (80, 90, 100, 110,
120oC), flow rate air dryer (9,1 and 16.3 m/s), the material flow rate (5.5 and
5.8 ml/s) and material concentration (5, 10, 15, 20, 25% salt). The drying
process lasts for 13 minutes and divided into 3 minutes of time spraying and 10
minutes for residence time in a spray dryer column.At a temperature of80° C,
the concentration of20%, materialflow rateof 5.5ml/sand aair flow rate of9.1m
/sobtainedsaltparticle diameterof67.144µmthen calculatesimilarityusingWebernumber,
obtainedAPdiameter of42.79µm.While ata temperature of 100° C, the concentration
of20%, with asame material and air flow rate,obtaineddriedsaltparticle
diameterof23.433µm.Afterwards, similaritycal culationusing theWebernumberobtainedAP diameter 13.877µm.
It can be seenthatthe result ofAPdiametersmaller than thediameter of
theparticlesinLAPAN (National Aeronautics and Space Institute),
rangedbetween100-170µm. We can conclude that the higher concentration of salt
solution, then the diameter of products are also getting bigger. The higher
temperature then the diameter of products are getting smaller. Calculation of
similarity both ammonium perchlorate and salt with the weber number has the
same graph trends.
Penulis: Cynthia Anggi
Maulina, Ahdayani Rosarrah, Mohammad Djaeni
Kode Jurnal: jpkimiadd130327
