KESETIMBANGAN DAN PROSES KECEPATAN PADA MEKANISME PENJERAPAN GAS KARBONDIOKSIDA MENGGUNAKAN STRONG BASE ANION EXCHANGE RESIN UNTUK PURIFIKASI BIOGAS

• Main Authors: , ANIES MUTIARI, , Dr. Ir. Aswati Mindaryani, M.Sc
• Format: Theses and Dissertations NonPeerReviewed
• Published: [Yogyakarta] : Universitas Gadjah Mada 2013
• Subjects: ETD
• Online Access: https://repository.ugm.ac.id/118614/; http://etd.ugm.ac.id/index.php?mod=penelitian_detail&sub=PenelitianDetail&act=view&typ=html&buku_id=58589
• Institution: Universitas Gadjah Mada

Biogas is one of renewable energy resources produced from an anaerobic digestion of biological wastes. It has been utilized to provide energy and electricity. The presence of non combustible gas such as CO2 in biogas affect engine performance adversely. Moreover, it is corrosive, toxic and reduces the combustion efficiency. Reducing CO2 content will significantly improve the quality of biogas as an energy source. In this research, a method for CO2 removal and CH4 enrichment by adsorption process is tested. The strong base anion exchange resin as adsorbent in this work is the commercial resin with Cl- attached in quartenary ammonium functional group. Water addition is required to ionize CO2 from gas phase into the bicarbonate form so that the bicarbonate ion is exchanged with corresponding ion on the resin. CO2 adsorption capacity was tested in batch processes. The variation of initial concentration of gas mixture was conducted in this experiment. Dissolved CO2 concentration in the liquid was analyzed by titration. Rate processes experiment in chemical adsorption of CO2 by ion exchange mechanism in a packed column was experimentally investigated. The water and resin were in the stationary phase in 5 cm diameter of column. Biogas was fed from the bottom of the column. Factors investigated in this research were gas flow rate and water resin ratio. Variations in gas flow rate used were 1 lpm, 0.8 lpm and 0.5 lpm. Variations in water-resin ratio used were 1:2 and 1:3. The CO2 concentration in the outlet gas stream was recorded as a function of time. CO2 samples taken in the gas outlet stream was analyzed using Gas Chromatography. The batch processes revealed that the data collected match the Langmuir model. The results for Cμmax and b were 0.0068 gr HCO3-/gr resin and 243.36 m3/mol respectively. The packed column experiment revealed that the adsorbent used was effective in reacting with CO2 in the mixed gas. The highest performance was 0.8 lpm gas flow rate and water-resin ratio 1:3. The value of rate processes parameters kGa, kla, k1 and k2 were 0.0432 mol/s/m3/atm