Studi Hidrodinamika Absorpsi Co2 Pada Pemurnian Biogas Di Dalam Kolom Gelembung Dengan Cfd (Computational Fluid Dynamic)

Ihsana, Yukh (2019) Studi Hidrodinamika Absorpsi Co2 Pada Pemurnian Biogas Di Dalam Kolom Gelembung Dengan Cfd (Computational Fluid Dynamic). Masters thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Studi tentang overall gas hold up telah dilakukan secara eksperimental dengan metode bed expansion. Kecepatan superfisial gas yang digunakan untuk percobaan adalah 6,369 m/s dan 10,616 m/s. Percobaan dilakukan dalam kolom gelembung dengan diameter dalam 7 cm dan tinggi 100 cm. Gas dialirkan melalui distributor yang terdiri dari perforated plate dan glass beads. Perforated plate memiliki diameter lubang 1 mm dan 0,5 mm. Computational Fluid Dynamic (CFD) menggunakan Eulerian digabungkan dengan model Population Balance dan species transport tanpa reaksi kimia dikembangkan untuk memprediksi overall gas hold up, dan distribusi ukuran gelembung. Pengaruh kecepatan superfisial gas, diameter perforated plate, sifat fisik dan kimia gas, dan ketinggian awal cairan pada overall gas hold up akan dipelajari. Dari hasil simulasi menunjukkan bahwa penggunaan Population Balance Model dapat meningkatkan keakuratan hasil overall gas hold up secara signifikan dibandingkan dengan menggunakan diameter gelembung konstan. Rezim heterogen atau Churn turbulent regime lebih terlihat pada semua kondisi operasi yang ditandai dengan terbentuknya ukuran gelembung yang berbeda beda. Ditemukan bahwa ada beberapa kondisi operasi yang mempengaruhi overall gas hold up, yaitu ketinggian awal cairan, kecepatan superfisial gas, dan sifat fisik dan kimia gas. Sementara pengaruh perbedaan diameter perforated plate terhadap overall gas hold up kecil dibandingkan dengan pengaruh kondisi operasi lainnya.
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The study of overall gas hold up has been carried out experimentally with the bed expansion. The superficial gas velocities used for the experiments are 6.369 m/s and 10.616 m/s. The experiment is carried out in a bubble column with inside diameters of 7 cm and a height of 100 cm. Gas from the gas cylinder is supplied through a distributor consisting of a perforated plate and glass beads. The perforated plate has a hole diameter of 1 mm and 0.5 mm. Computational Fluid Dynamic (CFD) using a Eulerian coupled with Population Balance model is developed to predict overall gas hold up, and bubble size distribution. Heterogeneous regimes or Churn turbulent regimes are more visible in all operating conditions characterized by the formation of different bubble sizes. The effect of superficial gas velocity, perforated plate diameter, gas properties, and initial liquid level on gas hold up will be studied. The used of population balance can improve the overall gas hold up results significantly compared to constant bubble diameter. It is found that there are several operating conditions that affect overall gas hold up, namely initial liquid level, superficial gas velocity, and differences in gas properties. While the influence of the difference in perforated plate diameter to overall gas hold up results is small compared to the influence of other operating conditions.

Item Type:	Thesis (Masters)
Uncontrolled Keywords:	Kolom gelembung, Absorpsi, CO2, Population Balance Model, Computational Fluid Dynamic
Subjects:	T Technology > TP Chemical technology > TP359 Biogas
Divisions:	Faculty of Industrial Technology > Chemical Engineering > 24101-(S2) Master Thesis
Depositing User:	FADLLA YUKH IHSANA ISTIGHFARINA
Date Deposited:	22 Jul 2026 02:32
Last Modified:	22 Jul 2026 02:32
URI:	http://repository.its.ac.id/id/eprint/69459

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