Analisis Performa Penggunaan Sistem Pendinginan Dual Mixed Refrigerant Pada Cryogenic Distillation COlumn Sebagai Carbon Capture Dalam Acid Gas Removal Unit

Sutrisno, Farhan Fadlurrahman (2024) Analisis Performa Penggunaan Sistem Pendinginan Dual Mixed Refrigerant Pada Cryogenic Distillation COlumn Sebagai Carbon Capture Dalam Acid Gas Removal Unit. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Dalam industri pengolahan gas alam, terdapat produk sampingan berupa berbagai gas asam seperti Hidrogen Sulfida dan Karbon Dioksida yang berdampak negatif terhadap lingkungan sehingga harus dicari solusi untk mereduksinya. Terkait dengan tantangan tersebut, penelitian ini bertujuan untuk menentukan tingkat reduksi gas asam dalam lingkup distilasi kriogenik untuk proses pendinginan Dual Mixed Refrigerant (DMR) dengan pendekatan simulasi dengan basis komposisi model larutan Amine yang digunakan dalam Acid Gas Removal Unit adalah 50% wt MDEA untuk proses 1 (NG A & MDEA A), 2 (NG A & MDEA B), 3 (NG B & MDEA A), dan 4 (NG B & MDEA B). Berdasarkan hasil simulasi, penggunaan teknik cryogenic distillation column dapat menghasilkan pemisahan fraksi mol CO2 dan H2S tertinggi dengan nilai sebesar 28,06% dan 67,15% yang terjadi pada Proses 3. Performa penerapan cryogenic distillation column juga dinilai dari tingkat pemulihan metana, tingkat pemulihan tekanan, tingkat pengurangan CO2, dan tingkat pengurangan H2S. Untuk tingat pemulihan gas Metana memiliki nilai maskimal pada proses 1 sebesar 79,38%. Tingkat pemulihan tekanan memiliki nilai maksimal pada proses 3 sebesar 96,46%. Studi ini juga menunjukkan bahwa penggunaan sistem cryogenic distillation column dengan larutan amine MDEA cukup efektif menghilangkan gas H2S dengan tingkat capaian reduksi tertinggi terjadi pada Proses 3 dengan nilai sebesar 92,91%. Namun demikian, masih diperlukan kajian lebih lanjut untuk mereduksi jumlah gas CO2 mengingat tingkat capaian reduksi tertinggi terjadi pada
Proses 3 dengan nilai sebesar 40,94%. Sistem Dual Mixed Refrigerant berhasil menurunkan suhu dan tekanan gas alam menjadi -163 C dan 110 kPa. Perbedaan signifikan terjadi pada Proses 3, dimana pada proses ini terdapat pengurangan fraksi mol sebesar 0,88%. Selain itu, studi ini juga menunjukkan bahwa nilai total exergy terbesar terdapat pada proses 3 dengan nilai sebesar 3589,87 MW dan nilai exergy destruction equipment paling besar terdapat pada proses
1 dengan nilai sebesar 853,7 MW.
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In the natural gas processing industry, there are by-products in the form of various acid gases such as Hydrogen Sulfide and Carbon Dioxide that have a negative impact on the environment so that solutions must be found to reduce them. Related to these challenges, this study aims to determine the level of acid gas reduction within the scope of cryogenic distillation for the Dual Mixed Refrigerant (DMR) refrigeration process with a simulation approach based
on the composition of the Amine solution model used in the Acid Gas Removal Unit is 50% wt MDEA for processes 1 (NG A & MDEA A), 2 (NG A & MDEA B), 3 (NG B & MDEA A), and 4 (NG B & MDEA B). Based on the simulation results, the use of cryogenic distillation column technique can produce the highest separation of CO2 and H2S mole fractions with values of 28.06% and 67.15% that occur in Process 3. The performance of the cryogenic distillation column application is also assessed from the methane recovery rate, pressure recovery rate, CO2 reduction rate, and H2S reduction rate. Methane recovery rate has a maximum value in process 1 of 79.38%. The pressure recovery rate has a maximum value in process 3 of 96.46%. This study also shows that the use of cryogenic distillation column system with MDEA amine solution is quite effective in removing H2S gas with the highest reduction achievement rate occurring in Process 3 with a value of 92.91%. However, further studies are still needed to reduce the amount of CO2 gas considering that the highest reduction achievement rate occurred in Process 3 with a value of 40.94%. The Dual Mixed Refrigerant system successfully reduced the natural gas temperature and pressure to -163 C and 110 kPa. Significant differences occurred in process 3, where there was a mole fraction reduction of 0.88%. In addition, this study also shows that the largest total exergy value is in process 3 with a value of 3589.87 MW and the largest exergy destruction equipment value is in process 1 with a value of 853.7 MW.

Item Type: Thesis (Other)
Uncontrolled Keywords: Carbon Capture, Cryogenic Distillation Column, Dual Mixed Refrigerant, Exergy, Gas Alam, Carbon Capture, Cryogenic Distillation Column, Dual Mixed Refrigerant, Exergy, Natural Gas
Subjects: T Technology > T Technology (General) > T58.8 Productivity. Efficiency
T Technology > TJ Mechanical engineering and machinery > TJ263 Heat exchangers
T Technology > TJ Mechanical engineering and machinery > TJ265.E23 Thermodynamics.
T Technology > TJ Mechanical engineering and machinery > TJ990 Compressors
T Technology > TP Chemical technology > TP155.7 Chemical processes.
T Technology > TP Chemical technology > TP492.3 Refrigeration and refrigerating machinery
T Technology > TP Chemical technology > TP761.L5 Liquefied natural gas
Divisions: Faculty of Industrial Technology > Mechanical Engineering > 21201-(S1) Undergraduate Thesis
Depositing User: Farhan Fadlurrahman Sutrisno
Date Deposited: 12 Aug 2024 06:04
Last Modified: 12 Aug 2024 06:04
URI: http://repository.its.ac.id/id/eprint/114956

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