Inova, Lifthya Asyfi and Nathania, Callista Aninda (2026) Desain Pabrik Cluster LNG (Liquefied Natural Gas) di Gresik dengan Kapasitas 0,3486 MTPA sebagai Suplai Pembangkit Listrik Wilayah Bali dan Nusa Tenggara. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Gas alam merupakan salah satu sumber energi utama yang memiliki prospek tinggi di Indonesia karena ketersediaannya melimpah dan karakteristiknya yang lebih ramah lingkungan dibandingkan bahan bakar fosil lainnya. Gas alam banyak dimanfaatkan sebagai bahan bakar industri maupun pembangkit listrik karena menghasilkan emisi yang rendah serta memiliki nilai kalor pembakaran yang tinggi. Peningkatan permintaan energi nasional mendorong perlunya pengelolaan dan distribusi gas alam yang lebih efisien. Salah satu solusi yang efektif adalah melalui pencairan gas alam menjadi Liquefied Natural Gas (LNG), yang mampu mengurangi volumenya hingga sekitar 1/600 dari kondisi gas normal sehingga lebih mudah disimpan dan diangkut. Dalam perancangan ini, direncanakan pembangunan pabrik LNG di Gresik, Jawa Timur, dengan kapasitas produksi sebesar 0,3486 MTPA atau 50 MMSCFD. Sebelum proses likuefaksi, gas alam terlebih dahulu dimurnikan menggunakan kolom adsorber menggunakan adsorben molecular sieve 3A untuk menghilangkan kandungan air, kemudian dilakukan pemisahan komponen ringan dan berat melalui kolom distilasi deethanizer dan debutanizer. Selanjutnya, proses pencairan gas alam dilakukan menggunakan teknologi Single Mixed Refrigerant (SMR) sebagai sistem pendingin utama. Penerapan konfigurasi proses ini diharapkan dapat menghasilkan LNG dengan kemurnian tinggi, efisiensi energi optimal, serta mendukung peningkatan keandalan pasokan energi nasional. Produk LNG yang dihasilkan memiliki komposisi metana yang mendominasi yaitu sebesar 82,51%, diikut dengan etana sebesar 14,32%. Kemudian produk LPG didominasi oleh propana dan butana sebesar 99,7% volume. Berdasarkan analisis ekonomi, dihasilkan internal rate of return (IRR) sebesar 26,91%, dengan break even point (BEP) sebesar 56,88%, serta pay out time selama 5 tahun. Maka, dapat disimpulkan bahwa pabrik ini layak didirikan.
Kata Kunci: Cluster LNG, LPG, Molecular Sieve 3A, Deethanizer, SMR, IRR, BEP
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Natural gas is one of the main energy sources with strong prospects in Indonesia due to its abundant availability and its more environmentally friendly characteristics compared to other fossil fuels. Natural gas is widely utilized as fuel for industrial applications and power generation because it produces low emissions and has a high heating value. The increasing national energy demand highlights the need for more efficient management and distribution of natural gas. One effective solution is the liquefaction of natural gas into Liquefied Natural Gas (LNG), which can reduce its volume to approximately 1/600 of its gaseous state, making it easier to store and transport. In this design, the construction of an LNG plant in Gresik, East Java, is proposed, with a production capacity of 0,3486 MTPA or 50 MMSCFD. Prior to the liquefaction process, the natural gas is first purified using an adsorber column with molecular sieve 3A as the adsorbent to remove water content. Subsequently, light and heavy components are separated through deethanizer and debutanizer distillation columns. The natural gas liquefaction process is then carried out using Single Mixed Refrigerant (SMR) technology as the main refrigeration system. The application of this process configuration is expected to produce high-purity LNG, achieve optimal energy efficiency, and support the improvement of national energy supply reliability. The resulting LNG product is dominated by methane at 82,51%, followed by ethane at 14,32%. Meanwhile, the LPG product is dominated by propane and butane, accounting for 99,7% by volume. Based on the economic analysis, the internal rate of return (IRR) is 26,91%, with a break-even point (BEP) of 56,88% and a payback period of 5 years. Therefore, it can be concluded that the plant is economically feasible to be established.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Liquefied Natural Gas, Deethanizer, Debutanizer |
| Subjects: | T Technology > TP Chemical technology > TP155.5 Chemical plants--Design and construction |
| Divisions: | Faculty of Industrial Technology and Systems Engineering (INDSYS) > Chemical Engineering > 24201-(S1) Undergraduate Thesis |
| Depositing User: | Lifthya Asyfi Inova |
| Date Deposited: | 21 Jul 2026 06:27 |
| Last Modified: | 21 Jul 2026 06:27 |
| URI: | http://repository.its.ac.id/id/eprint/135949 |
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