Teknik Kimia Universitas Brawijaya Hypochlorite electrolysers www.themegallery.com Teknik Elektrokimia Dosen : Vivi Nurhadianty
Teknik KimiaUniversitas Brawijaya
Hypochlorite electrolysers
www.themegallery.com
Teknik Elektrokimia
Dosen : Vivi Nurhadianty
Teknik Kimia UB
PENDAHULUAN
Kuliah
kePokok Bahasan Sub Pokok Bahasan
Jenis Kegiatan
Pembelajaran
Bentuk
Tugas
Taksonomi
1 2 3 4 5 6
9. Water Purification Hypochlorite on site electrolyser Kuliah, diskusi
10. Water Purification Electrodialysis
Other process
Kuliah, diskusi
11. Metal Finishing Electroplating Kuliah, diskusi
12. Metal Finishing Electrophoretic painting
Other process
Kuliah, diskusi
13. Electrochemical sensor
and monitoring technic
Polarography to anodic stripping
voltammetry
Kuliah, diskusi
14. Electrochemical sensor
and monitoring technic
Portable device
Electrochemical biosensor
Kuliah, diskusi Tugas
mandiri
15. Kuis 2 (materi 8 s/d 14)
UJIAN AKHIR SEMESTER (UAS)
Teknik Kimia UB
Hypochlorite electrolysers
Beberapa proses elektrokimiamenghasilkan oksidan dapat digunakanpada aliran purify water
Agen pengoksidasi yang paling umum dantelah dikenal cukup lama adalahhypochlorite dan chlorine
Aplikasi cukup luas yaitu di effulenttreatment industry, sterilization water for food process and hospital laundries, treatment of cooling water
Teknik Kimia UB
EXPERIMENTAL
A bench scale setup with a length of 250 mm and an outer diameter of 200 mm was fabricated to assess the NaOCl production capability of the prototype cell from seawater (salem, et al. 2012)
Figure 1. Schematic of sodium hypochlorite production electrochemical set-up (not to scale)
Teknik Kimia UB
EXPERIMENTALIn each batch experiment 3,000 ml of seawater was utilized while the temperature was maintained between 25 to 26 C. Each experimental run continued for at least 2.5 h. Seawater samples were collected from the cell every 20 min and transported to the laboratory for NaOCl concentration determination (salem, et al. 2012)
Teknik Kimia UB
Electrolyzed Water
1. Hasil uji menunjukkan bahwa EOW dapat diaplikasikan
sebagai antiseptik yang memiliki kemampuan membunuh
bakteri lebih baik daripada Sodium hypochlorite.
2. Cyclic voltammogram menunjukkan bahwa reaksi pada
produksi EOW adalah irreversibel.
3. Potensial yang digunakan yaitu berkisar 2 V terhadap
elektroda Ag/AgCl, cukup efektif menghasilkan EOW dengan
tidak adanya produk samping.
4. Reaksi pada produksi EOW adalah sebagai berikut,
Cl- teroksidasi menjadi Cl2 pada -0,9 V terhadap elektroda
Ag/AgCl
2 Cl- Cl2 + 2e-
oksidasi Cl2 menjadi HClO pada 1 V terhadap elektroda
Ag/AgCl
Nurhadianty, dkk. 2011
Teknik Kimia UB
Saat ini dikenal sebagai by product chloralkali industry.
Material katoda : stainless stell, nikel, atautitanium
Material anoda : graphite, titanium (Dimensionally Stable Anoda)
Energy konsumsi : 3,7 kWh/kg
Current densitas : 0,1 0,5 A /cm2
Umumnya menggunakan parallel plate geometry
Hypochlorite electrolysers
Teknik Kimia UB
Dimensionally Stable Anodes
Dimensionally stable anodes (DSA) were developed in the mid-1960's for
the chlor-alkali industry. They are called dimensionally stable because
they utilize precious metal containing electrocatalysts, like RuO2,
coated on titanium. The titanium substrate is corrosion resistant in the
chlorine generating environment which allows for the structure to maintain
its dimensional tolerance during its life unlike the graphite anodes they
replaced. Since their introduction into the chlor-alkali industry, DSAs have
found economic application in chlorate generation, water disinfection, pool
chlorinators, organic destruction, electrogalvanizing, electrotinning and
metal plating.
Teknik Kimia UB
Industrial process
Teknik Kimia UB
Hypochlorite electrolysers
Teknik Kimia UB
Hypochlorite electrolysers
Teknik KimiaUniversitas Brawijaya