Kontaktor Membran Menyilang Ganda untuk Absorpsi-Desorpsi CO2 Dalam Biogas Menggunakan Pelarut Dietanolamina dengan Teknologi Regenerasi Vakum

Pambudi, Alfian Wisnu (2025) Kontaktor Membran Menyilang Ganda untuk Absorpsi-Desorpsi CO2 Dalam Biogas Menggunakan Pelarut Dietanolamina dengan Teknologi Regenerasi Vakum. Masters thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Pemisahan CO2 dari biogas melalui integrasi proses absorpsi dan desorpsi dalam satu sistem kontaktor membran merupakan pendekatan efisien untuk meningkatkan kualitas biogas sekaligus mengatasi keterbatasan sistem konvensional yang menggunakan modul terpisah. Penelitian ini bertujuan untuk mengkaji kinerja kontaktor membran menyilang ganda dalam proses simultan absorpsi dan desorpsi CO2 dari biogas menggunakan pelarut Dietanolamina (DEA) dengan teknologi regenerasi vakum. Modul yang digunakan memiliki luas area absorpsi sebesar 1,96×10^(-2) m2 dan luas area desorpsi sebesar 5,89×10^(-2) m2. Pelarut DEA 30% berat disirkulasikan secara kontinyu dengan laju alir 100 mL/menit, sementara feed gas dialirkan pada rentang 40–120 mL/menit melalui sisi tube. Proses desorpsi berlangsung pada tekanan vakum 10–30 cmHg (vacuum) dengan suhu pelarut 30°C dan 50°C. Kinerja sistem dianalisis dari fluks dan efisiensi absorpsi-desorpsi yang dihitung dari hasil Gas Chromatography dan Titrasi Chittick. Efisiensi absorpsi tertinggi 85,42 % didapat pada laju alir biogas 40 mL/menit suhu pelarut 30 ℃ , sedangkan efisiensi desorpsi maksimum mencapai 63,09 % didapat pada laju alir biogas 40 mL/menit suhu pelarut 50 ℃. Fluks absorpsi dan desorpsi tertinggi masing-masing 34,99 ×10^(-4) mol/m2.s didapat pada laju alir biogas 120 mL/menit suhu pelarut 30 ℃ dan 3,752×10^(-4) mol/m2.s didapat pada laju alir biogas 120 mL/menit suhu pelarut 50 ℃. Analisis optimasi menunjukkan kondisi operasi optimum pada laju alir biogas 75,97 mL/menit, suhu pelarut 50 °C, tekanan vakum 30 cmHg, dan pelarut yang disirkulasikan 100 mL/menit yang menghasilkan efisiensi dan fluks absorpsi-desorpsi CO2 optimal secara simultan. Konfigurasi membran menyilang ganda yang terintegrasi dengan teknologi regenerasi vakum menawarkan efisiensi energi dan konsumsi pelarut yang lebih baik.
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The separation of CO2 from biogas through the integration of absorption and desorption processes within a single membrane contactor system presents an efficient approach to improving biogas quality while addressing the limitations of conventional systems that utilize separate modules. This study aims to evaluate the performance of a double crossflow membrane contactor for the simultaneous absorption and desorption of CO2 from biogas using diethanolamine (DEA) solvent with vacuum regeneration technology. The membrane module employed has an absorption area of 1,96 × 10-2 m2 and a desorption area of 5,89 × 10-2 m2. A 30 wt% DEA solvent continuously circulated at a flow rate of 100 mL/min, while the feed gas was introduced through tube side at a flow rate from 40 to 120 mL/min. The desorption process was carried out under vacuum conditions at 10-30 cmHg with solvent temperatures of 30 °C and 50 °C. System performance was evaluated based on CO2 flux and absorption–desorption efficiency, calculated from Gas Chromatography and Chittick Titration results. The highest absorption efficiency of 85,42% was achieved at a biogas flow rate of 40 mL/min and a solvent temperature of 30 °C, while the maximum desorption efficiency of 63,09% was obtained at the same flow rate with a solvent temperature of 50 °C. The highest absorption and desorption fluxes were 34,99 × 10-4 mol/m2.s and 3,752 × 10-4 mol/m2.s, respectively, both achieved at a biogas flow rate of 120 mL/min, with solvent temperatures of 30 °C and 50 °C. Optimization analysis indicated that the optimal operating conditions were a biogas flow rate of 75,97 mL/min, solvent temperature of 50 °C, vacuum pressure of 30 cmHg, and solvent circulation rate of 100 mL/min, resulting in the highest simultaneous CO2 absorption-desorption flux and efficiency. The dual membrane crossflow configuration integrated with vacuum regeneration technology offers improved energy efficiency and reduced solvent consumption.

Item Type:	Thesis (Masters)
Uncontrolled Keywords:	Absorpsi, Biogas, Desorpsi, Dietanolamina, Membran, Absorption, Biogas, Desorption, Dietanolamine, Membrane
Subjects:	Q Science > QD Chemistry > QD117 Absorption Q Science > QD Chemistry > QD63.S4 Separation (Technology) T Technology > TP Chemical technology > TP155.7 Chemical processes. T Technology > TP Chemical technology > TP159.M4 Membranes (Technology) T Technology > TP Chemical technology > TP248.25.M46 Membrane separation T Technology > TP Chemical technology > TP359 Biogas
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Chemical Engineering > 24101-(S2) Master Thesis
Depositing User:	Alfian Wisnu Pambudi
Date Deposited:	01 Aug 2025 03:43
Last Modified:	01 Aug 2025 03:43
URI:	http://repository.its.ac.id/id/eprint/125332

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