MEMBRAN MATRIKS TERCAMPUR ZEOLIT/Na-ALGINAT/Na-TARTRAT SEBAGAI MEMBRAN SELEKTIVITAS PEMISAH GAS CO2/CH4

ERNAWATI, Dr. Adhitasari Suratman, M.Si;Dr. Agus Kuncaka, DEA

2017 | Skripsi | S1 KIMIA

Telah dilakukan penelitian mengenai membran matriks tercampur (Mixed Matrix Membranes (MMMs)) zeolit/Na-alginat/Na-tartrat sebagai membran selektivitas pemisah gas CO2/CH4. Penelitian ini bertujuan untuk mempelajari pengaruh penambahan Na-tartrat terhadap sifat mekanik membran, permeabilitas dan selektivitas MMMs serta mempelajari pengaruh tekanan terhadap permeabilitas dan selektivitas MMMs. Penelitian dilakukan dengan membuat MMMs zeolit/Na-alginat/Na-tartrat dengan variasi rasio massa Na-alginat:Na-tartrat 1:0; 1:0,2; 1:0,5; 1:0,7 dan 1:1,0 (%b/v). Ketiga campuran bahan diaduk selama 36 jam dan dikeringkan selama 96 jam pada suhu ruang. MMMs yang terbentuk diuji menggunakan Texture Analyzer dan Sel Uji Permeasi, kemudian dikarakterisasi menggunakan instrumen Fourier Transform Infrared Spectroscopy (FT-IR)dan Scanning Electron Microscopy (SEM). Hasil penelitian menunjukkan bahwa penambahan Na-tartrat menaikkan elastisitas dan fleksibilitas membran yang ditunjukkan dengan meningkatnya nilai persen perpanjangan hingga komposisi rasio massa Na-alginat:Na-tartrat 1:0,7 sebesar 29%. Penambahan Na-tartrat menyebabkan laju permeasi gas CO2 dan CH4 mengalami kenaikan hingga komposisi rasio massa Na-alginat:Na-tartrat 1:0,7 dengan laju permeasi CO2 dan CH4 sebesar 4,170 x 10-6 dan 0,363 x 10-6 cm3 (STP)/cm2 s cmHg dengan selektivitas CO2/CH4 sebesar 12,993. Permeabilitas dan selektivitas MMMs terhadap gas CO2 dan CH4 terus meningkat seiring dengan kenaikan tekanan. Tekanan maksimum didapat pada tekanan 15 Psi dengan laju permeasi gas CO2 dan CH4 sebesar 6,590 x 10-6 dan 0,330 x 10-6 cm3 (STP)/cm2 s cmHg dan selektivitas CO2/CH4 sebesar 19,970.

Research on the mixed matrix membranes (MMMs) zeolite/Na-alginate/Na-tartrate as selective membrane of CO2/CH4 gas separation had been done. The purposes of this research were to study the effect of sodium tartrate to the mechanical properties of the membrane, the permeability and the selectivity of MMMs, and the effect of pressure on permeability and selectivity of MMMs as separation membrane CO2/CH4. The research was started by making the MMMs zeolite/Na-alginate crosslinked by sodium tartrate with mass ratio of Na-alginate/sodium tartrate 1:0, 1:0.2, 1:0.5, 1:0.7 and 1:1.0 (%b/v). The third mixture had been stirred for 36 hours and dried for 96 hours at room temperature. The MMMs were tested using Texture Analyzer dan Cell Permeation Testing, then the MMMs physical properties was characterized by Fourier Transform Infrared Spectroscopy (FT-IR) and Scanning Electron Microscopy (SEM). The results showed that the addition of sodium tartrate increased the elasticity and the flexibility of the membrane, it was reflected in the increasing value elongation percentage of MMMs in the composition of the mass ratio of Na-alginate/sodium alginate 1:0.7 by 29%. The effect of sodium tartrate addition against gas permeation rate of CO2 and CH4 showed an increase to the composition of the mass ratio of Na-alginate/sodium tartrate 1:0.7 by CO2 and CH4 permeation rate of 4.710 x 10-6 and 0.363 x 10-6 cm3(STP )/cm2 s cmHg with the selectivity of CO2/CH4 at 12.993. The permeation and the selectivity of MMMs showed a linear relation to the increase of pressure. Maximum pressure obtained at the pressure of 15 psi at the permeation rate of CO2 and CH4 of 6.590 x 10-6 and 0.330 x 10-6 cm3(STP)/cm2 s cmHg and the selectivity of CO2/CH4 at 19.970.

Kata Kunci : MMMs, pemisahan gas, Na-tartrat, Na-alginat, zeolit