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Abstrak :
Gas alam yang memiliki kandungan H2S tinggi dapat menyebabkan masalah lingkungan karena gas H2S merupakan gas berbahaya. Oleh karena itu, penghilangan gas H2S sangat dibutuhkan. Oleh karena itu, dibuatlah rancangan beserta estimasi biaya dari Sulfur Recovery Unit. Rancangan SRU disimulasikan menggunakan software PROMAX serta estimasi biaya mencakup Capital Expenditure dan Operating Expenditure. Produksi sulfur dengan membakar H2S didalam tungku dan juga secara katalitik. Sulfur kemudian dikondensasi untuk mendapatkan sulfur cair. SRU ini memproduksi sulfur sebesar 54,55 ton/hari dan listrik netto sebesar 320 kW dengan nilai Capital Expenditure sebesar USD 11,92 juta serta Operating Expenditure sebesar USD 2,05 juta. ......Natural gas which has large H2S amount can cause many environmental issue because H2S is a harmful toxic gas. Therefore, it is required to reduce H2S amount and it is important to design the Sulfur Recovery Unit and calculate its cost estimation. The SRU design simulated with PROMAX software and the cost estimations are included Capital Expenditure and Operating Expenditure. Sulfur produced by burning H2S in furnace and by catalytic process. Furthermore, sulfur condensed to produce liquid sulfur. This SRU produce sulfur and sellable electricity about 54.55 ton/day and 320 kW respectively. The estimation of Capital Expenditure and Operating Expenditure were about USD 11.92 millions and USD 2.05 millions.

Abstrak :
Dalam industri pengolahan gas bumi, proses penyingkiran gas asam seperti H2S diperlukan untuk memenuhi spesifikasi gas jual pada LPG Recovery. Beberapa unit pengolahan gas bumi di Indonesia memiliki konsentrasi H2S dalam gas asam yaitu > 50-%mol. Gas asam ini kemudian diolah di unit pengubahan gas asam yang disebut Sulfur Recovery Unit. Sudah ada beberapa teknologi SRU yang dikembangkan baik industri di dunia maupun di Indonesia, namun yang sudah terbukti secara komersial diaplikasikan adalah teknologi Claus dan teknologi WSA (Wet Sulfuric Acid). Software Aspen HYSYS V.12 digunakan untuk simulasi kedua teknologi tersebut. Hasil simulasi dengan kapasitas umpan gas asam 250-500 kgmole/hr dengan komposisi H2S >50%-mol didapatkan hasil untuk teknologi Claus Selectox menghasilkan laju alir produk sulfur = 96-115.5 ton/day; komposisi SO2 produk gas buang = 1396 – 1862 mg/Nm3; total konversi keseluruhan reaktor 75%; efisiensi termal dari sistem boiler yaitu 46.2-50.8%; pemanfaatan listrik dari steam yang dihasilkan yaitu 26,064-29,664 MW,sedangkan teknologi WSA menghasilkan laju alir produk asam sulfat = 123.9-133.6 ton/day; SO2 produk gas buang = 1369 – 1396 mg/Nm3; total konversi keseluruhan reaktor 82%; efisiensi termal dari sistem boiler yaitu 78-83%; pemanfaatan listrik dari steam yang dihasilkan yaitu 3,973-4,068 MW. Analisa keekonomian dari Teknologi Claus Selectox IRR = 5.5%; NPV = 12,802 USD juta; POT = 9 tahun, sedangkan Teknologi WSA IRR = 13.7%; NPV = 31,029 USD juta; POT = 8 tahun. Hasil analisa teknis dengan simulasi serta analisis keekonomian, maka teknologi WSA dipilih sebagai teknologi yang lebih baik untuk proses sulfur recovery di LPG unit......In the oil and gas processing industry, acid gas removal processes such as H2S are required to meet the sales gas specifications for LPG Recovery. Several natural gas processing units in Indonesia have a concentration of H2S in acid gas, namely> 50-% mol. This acid gas is then treated in acid gas conversion unit called the Sulfur Recovery Unit. There have been several SRU technologies developed by both industry in the world and in Indonesia, but what has been proven to be commercially applied is Claus technology and WSA technology (Wet Sulfuric Acid). Aspen HYSYS V.12 software is used to simulate the two technologies. The simulation results with acid gas feed capacity of 250-500 kgmole/hr with composition of H2S> 50%-mol obtained results for the Claus Selectox technology resulting in flow rate of sulfur products = 96-115.5 ton/day; composition of exhaust gas product SO2 = 1396-1862 mg/Nm3; the total conversion of the reactor 75%; the thermal efficiency of the boiler is 46.2-50.8%; electricity utilization from steam produced is 26,064-29,664 MW while the WSA technology produces sulfuric acid product flow rate = 123.9-133.6 ton/day; SO2 exhaust gas products = 1369-1396 mg/Nm3; total conversion of the reaktor 82%; the thermal efficiency of the boiler is 78-83%; electricity utilization from steam produced is 3,973-4,068 MW. Economic analysis obtained from Claus Selectox Technology IRR = 5.5%; NPV = 12,802 USD million; POT = 9 years, while WSA Technology IRR = 13.7%; NPV = 31,029 USD million; POT = 8 years. The result of technical analysis with simulation and economic analysis, the WSA technology was chosen as a better technology for the sulfur recovery process at the LPG plant.

Abstrak :
Pemilihan proses Tail Gas Treatment yang tepat dan efisien menjadi permasalahan bagi pabrik pengolahan gas alam. Superclaus, salah satu proses sulfur recovery, menjawab permasalahan tersebut dengan mengeliminasi proses Tail Gas Treatment pada skema SRU konvensional. Input proses Superclaus adalah acid gas 2,54 MMSCFD dengan kandungan hidrogen sulfida mencapai 41% berhasil memperoleh kembali sulfur lebih dari 96% dan kemurnian sulfur mencapai 99,9%. Kadar H2S di gas buang dapat diturunkan hingga 0 ppm. Kapasitas produksi adalah 52,96 ton per hari. Biaya modal untuk SRU Superclaus sebesar 101,5 milyar rupiah dan biaya operasional sebesar 15,6 milyar rupiah per tahun. ......Selection of an appropiate and cost effective Tail Gas Treatment is a challenge for natural gas plant. Superclaus, one of sulfur recovery process, able to solve this problem by eliminating Tail Gas Treatment process at SRU conventional scheme. Feed stream of Superclaus is acid gas 2.54 MMSCFD with hydrogen sulfide 41% mole able to recover sulfur more than 96% and sulfur purity reach 99.9%. Levels of H2S in flue gas can be reduced to 0 ppm. Production capacity is 52.96 tonne per day. Capital expenditure for SRU Superclaus is 101.5 billion IDR and operational expenditure is 15.6 billion IDR per year.