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ITS » Undergraduate Theses » Teknik Kimia Ekstensi S1
Posted by eny at 10/12/2009 13:44:19  •  3417 Views


SINTESA PARTIKEL SILIKA BERPORI DENGAN PENAMBAHAN GELATIN SEBAGAI TEMPLATE DALAM SPRAY DRYER

SYNTHESIS OF POROUS SILICA PARTICLE BY ADDING GELATIN AS TEMPLATE IN SPRAY DRYER

Author :
CHANDRA, ADE ; ANDREAS, YULIUS 




ABSTRAK

Penelitian ini menunjukkan pengaruh kondisi suhu operasi dan penambahan gelatin sebagai template terhadap karakteristik partikel seperti luas permukaan surface area dan volume pori pore volume pada pembuatan partikel silika berpori dengan metode spray drying. Sintesa partikel silika berpori terdiri atas tahap pembuatan precursor yang berupa sol silika dengan mengunakan sodium silikat yang diencerkan sebagai bahan baku yang dilewatkan melalui resin ion H ion exchange selanjutnya ditambahkan dengan glycerol dan gelatin hingga ratio antara SiO2gelatin 331 1651 111 8261. Sol tersebut akan dispraykan melalui sebuah nozzle ke dalam chamber dengan mengunakan gas carrier yang dihasilkan dari compressor dengan laju 4548 Lmin STP. Droplet-droplet yang terbentuk akan masuk hot wall turbular reaktor yang terbuat dari pipa stainless steel dengan diameter 38 cm dan tinggi 150 cm yang dilengkapi dengan temperature controller aerosol generator dan particle collector dimana pada reaktor tersebut akan dibagi menjadi 2 zona temperatur yaitu zona 1 T1 dengan temperatur konstan pada 120 oC dan zona 2 T2 pada 150 180 210 240 270 oC. Partikel yang terbentuk dari reaktor akan ditangkap pada particle collector yang berbentuk silinder dengan diameter 38 cm dan tinggi 20 cm yang dilengkapi dengan baffle-baffle dibagian sisi selimutnya kemudian partikel akan dianalisis dengan mengunakan metode BET-Adsorbsi Nitrogen dan Scanning Electron Microscopy SEM untuk mengetahui karakt Partikel silika yang diperoleh berupa bubuk halus powder berwarna putih. Semakin kecil ratio SiO2gelatin pada berbagai suhu membuat diameter partikel yang dihasilkan surface area dan volume pori juga semakin besar dengan tingkat kecenderungan untuk membentuk agglomerate semakin tinggi. Semakin besar suhu operasi zona 2 evaporasi gelatin pada berbagai ratio SiO2gelatin membuat diameter partikel cenderung semakin kecil surface area dan vulume pori semakin besar. Morfologi partikel yang dihasilkan rata-rata berbentuk spherical dan sedikit berbentuk hollow doughnut. Partikel silika yang dihasilkan mempunyai median diameter partikel rata-rata pada range 4-6 61549m. Surface area yang dihasilkan pada partikel silika rata-rata 10 m2gr dan terbesar pada variable percobaan ratio SiO2gelatin 1651 suhu operasi 270oC yaitu sebesar 1321 m2gr. Volume pori yang dihasilkan pada partikel silika rata-rata 0005 cm3gr molekul dan terbesar pada variable percobaan ratio SiO2 gelatin 1651 suhu operasi 270oC yaitu sebesar 000671 cm3gr molekul. Dengan demikian dapat disimpulkan bahwa proses kalsinasi merupakan alternatif proses untuk memperbesar porositas partikel silika.


ABSTRACT

This research shows the influences of operation temperature condition and adding gelatin as template to particle characteristics including surface area and pore volume in synthesis of porous silica particles by spray drying method. The synthesis of porous silica particles is made by several treatment. The precursor i.e silica sol was prepared by passing sodium silicate through H ion exchanger then added gelatin solution until the SiO2 gelatin ratios are 331 1651 111 8261. The silica sol was atomized to form droplets using twin-fluid noozle. The droplets were carried by air with velocity of 4548 Lmin STP into the heated reactor. The experiment was carried out in hot wall tubular reactor made of stainless steel. The reactor has 38 cm in diameter and 150 cm in height equipped with temperature controller aerosol generator and particle collector. There was 2 zones at the reactor zone 1 was constant temperature at 120oC to evaporate water zone 2 was varied from 150 to 270 oC to evaporate gelatin. The particles formed were collected in a particle collector that consist of many baffles to deposit them. The particles formed were analyzed by BET Nitrogen Adsorbtion and Scanning Electron Microscopy SEM. Particles were in fine powder formed with white color. The results are showed that particles diameter surface area and pore volume progressively increases by decreasing of SiO2gelatin ratio in various of temperature and also increase the state of agglomeration. Surface area and pore volume rogressively increases by increasing temperature of zone 2 and diameter particles will decreased. The average morphology is spherical and some of in hollow doughnut. The range of average particles diameter median were 46 61549m. The average surface area was gotten in 10 m2gr with the highest surface area was from SiO2gelatin ratio 1651 operating temperature of 270oC was 1321 m2gr. The range of average particles diameter median were 46 61549m. The average pore volume was gotten in 0005 m3g.molecule with the highest pore volume was from SiO2gelatin ratio 1651 operating temperature of 270oC was 000671 cm3g.molecule. Calcination was the alternative process to increased the porosity of silica particle.



KeywordsAerosol ; Spray drying ; Surface area ; Volume pori
 
Subject:  Silika
Contributor
  1. Dr.Ir. Heru Setyawan, M.Eng.
    Prof.Dr. Sugeng Winardi, M.Eng.
Date Create: 10/12/2009
Type: Text
Format: pdf
Language: Indonesian
Identifier: ITS-Undergraduate-3100007029177
Collection ID: 3100007029177
Call Number: RSK 661.068 3 Cha s


Source
Undergraduate Theses, Department of Chemical Engineering, RSK 661.068 3 Cha s, 2007

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