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Abstract
Absorption study of emission gas (SO2, NO2, CO, and CO2) from coal boiler with NaOH absorber waste of textile industry has been done. Acid gasses neutralized and particulate trapped by NaOH solution. NaOH was chosen for efficiency of waste neutralized and obtained from waste absorber and conventional textile finishing process (NaOH) with the concentration of 100 mol/m3. Emitted disposal gas concentration at flow rate 500, 1000, 2500, 5000, and 10,000 L/hour before and after absorption was measured and analyzed using MATLAB and EXCEL software. There was no significant difference between observation and theoretical calculation data (P<0,05). At flow rate 2500 L/hour concentration of emission gas have shown under threshold values. A liquid-gas absorption model that obtained form this study could be used to predict optimum flow rate required for reducing the emission gas concentration to the quality threshold values.
Highlights
PENDAHULUAN Pencemaran udara yang dihasilkan dari emisi boiler berbahan bakar batubara memberikan kontribusi yang besar bagi pencemaran lingkungan
Dengan melihat material yang akan dikontakkan ke dalam absorber yaitu gas asam dan cairan penyerap basa, maka proses ini termasuk dalam absorbsi kimia, di mana gas terlarut dalam larutan penyerap disertai dengan adanya reaksi kimia
Pada laju alir tersebut gas emisi SO2 sudah di bawah baku mutu
Summary
Pengamatan penelitian meliputi emisi boiler batubara, pencatatan dan analisa laboratorium emisi gas buang sebelum dan sesudah absorber, pencatatan laju alir gas dan penyerap, pencatatan spesifikasi dan dimensi absorber gas, evaluasi proses absorbsi, perhitungan efisiensi penyerapan cair-gas, dan perhitungan konsentrasi gas keluar absorber gas. Penelitian dimulai dari pengambilan emisi gas buang boiler yang telah diserap di absorber dengan mengubah laju alir cairan NaOH. Variabel tetap adalah konsentrasi larutan NaOH, laju alir gas masuk absorber, konsentrasi gas masuk absorber, temperatur gas masuk, dimensi absorber, dan waktu pengambilan sampel. Pada Gambar 2 bisa ditampilkan gas masuk ( Gin ) pada bagian bawah absorber, berlawanan arah dengan cairan NaOH penyerap dari atas absorber ( Lin ). Cairan NaOH yang telah kontak dengan gas emisi akan keluar pada bagian bawah absorber ( Lout ). Penjelasan proses absorbsi gas-cair melalui lapisan film akan dijelaskan pada persamaan
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