Pengembangan Proses Regenerasi Absorben NaOH di dalam Unit Acid Gas Removal Menggunakan Membrane Electrolysis Sistem Kontinu

Rinanda, Zalza Lola and Romdhoni, Muhammad Fattah (2017) Pengembangan Proses Regenerasi Absorben NaOH di dalam Unit Acid Gas Removal Menggunakan Membrane Electrolysis Sistem Kontinu. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Salah satu proses untuk meregenerasi unit absorben yang menggunakan NaOH dapat dilakukan dengan membrane electrolysis. Namun, proses tersebut masih menggunakan sistem batch dengan voltase yang besar. Oleh sebab itu diperlukan sebuah inovasi penggunaan membrane elektrolisa menggunakan sistem seri kontinu dengan mengurangi jarak elektroda sehingga didapatkan regenerasi NaOH yang efisien. Metode penelitian ini menggunakan membrane elektrolysis dengan jumlah sel sebanyak 4 buah dimana feed anolit berupa larutan Na2CO3 0.2 M dan NaOH 0.1 M dan feed katolit berupa DM Water dengan laju aliran bersifat counter current. Variabel kondisi operasi berupa penambahan larutan elektrolit pada katolit berupa NaOH dengan konsentrasi 0.05M, 0.1M dan 0.3M serta larutan elektrolit pada anolit berupa HCl. jarak elektroda 1 cm dan 3 cm. laju alir 20 ml/menit, 40 ml/menit, dan 60 ml/menit. Hasil dari penelitian ini menunjukan bahwa jarak elektroda mempengaruhi kenaikan current density dan % konversi dari proses yang ada sedangkan kenaikan flowrate menurunkan % konversi namun penurunan current density lebih rendah. Kemudian elektrolit pada katoda mempengaruhi proses awal dengan mempercepat kenaikan arus sedangkan elektrolit HCl pada anoda menghasilkan % konversi lebih baik namun mengakibatkan pitting break pada elektroda. Hasil optimal didapatkan pada jarak 1 cm dengan laju alir 60 ml/menit dan tanpa larutan elektrolit dengan kebutuhan energi 0.75 M/kw serta biaya produksi NaOH sebesar Rp 13.590/kg. =================================================================================================== There are many ways to regenerate absorbant using Sodium Hydroxide (NaOH), and one of them is using membrane electrolysis. However, those process that had already done was using batch system and high amount of voltage. Because of that, an innovation is needed, which is using series continuous system and reducing each electrode spaces, so NaOH regeneration’s result will be optimum. This experiment uses 4 cells of membrane electrolysis which is arranged in series continuous system, using Na2CO3 0.2 M and NaOH 0.1 M solutions as anolyte feed and DM water as chatolyte feed, which ais arranged in counter current flow. Operating condition variables such as NaOH electrolyte 0.05M, 0.1M and 0.3M solution addition in chatolyte, and HCl addition in anolyte; electrode spaces for 1 cm and 3 cm; and last, flowrate variables in 20 ml/minute, 40 ml/minute, dan 60 ml/minute. The results from this experiment show that electrode spaces affect the increasing in current density and conversion percentage from the process, while the rising in flowrate amount lower the conversion percentage, however the decreasing in current density will be lower. Then the electrolyte addition in chatode affects the initial process by fasten the increasing of electrical current, in the other hand the addition of electrolyte (HCl) in anode generates better coversion percentage,unfortunately this can cause pitting break in electrode. The optimum result is obtained by 1cm space, using flowrate variable 60ml/minute and without adding electrolyte solution. This process requires energy in the amount of 0.75 M/kW and NaOH production cost for Rp 13.590/kg.

Item Type: Thesis (Undergraduate)
Uncontrolled Keywords: Acid Gas Removal, Regenerasi NaOH, Membran Electrolysis Sistem Kontinu
Subjects: T Technology > TP Chemical technology > TP255 Electrochemistry, Industrial.
T Technology > TP Chemical technology > TP359 Biogas
Divisions: Faculty of Industrial Technology > Chemical Engineering > (S1) Undergraduate Theses
Depositing User: Muhammad Fattah Romdhoni
Date Deposited: 30 Nov 2017 01:42
Last Modified: 06 Mar 2019 04:34
URI: http://repository.its.ac.id/id/eprint/44202

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