Ratnasari, Maya Aulia and Muiz, Burhanudin (2016) Pabrik Dimethyl Ether (DME) Dari Gas Alam Dengan Proses Direct Contact. Diploma thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Dimethyl ether (DME) merupakan ether sederhana dengan mono
struktur kimia CH3-O-CH3 dalam bentuk gas pada kondisi ambient dan
dapat digunakan sebagai substitusi LPG dengan merubah hanya
beberapa infrastruktur yang tersedia. Pabrik DME ini didirikan di
Cilegon, Jawa Barat dengan kapasitas sebesar 22500 ton/tahun (2,841
ton/hari).
Pabrik ini menggunakan teknologi proses Direct Contact dari
JFE (Jeifui). Tahap pertama yaitu proses pre-treatment untuk
menghilangkan kandungan H2S dalam Gas Alam. Tahap kedua yaitu
proses reforming untuk mengkonversi gas alam menjadi gas sintesa
(syngas) pada temperatur 800oC dan tekanan 30 bar dan menghasilkan
gas sisa yaitu flue gas yang digunakan sebagi suplai panas pada heater
dan steam reforming. Tahap ketiga yaitu proses direct contact untuk
mengkonversi gas CO dan H2 menjadi produk DME dari syngas pada
temperatur 260oC dan tekanan 50 bar. Tahap keempat yaitu proses
pemisahan syngas dari produk DME cairan dengan Flash Separator.
Kemudian, proses purifikasi dilakukan dengan distilasi pada tekanan 11
bar untuk menghasilkan kualitas 99% DME dengan impuritis berupa air
dan methanol 1%.
Untuk mencapai kapasitas produksi DME, pabrik ini
membutuhkan bahan baku utama gas alam sebanyak 2,841 ton/hari.
Kebutuhan utilitas Pabrik, yaitu 2,03 m3/hari air sanitasi; 463,47
m3/hari air pendingin, dan 90 m3/hari air umpan boiler.
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Dimethyl ether (DME) is a simple monoether chemical
structure CH3-O-CH3 as gas at ambient conditions and can be used to
substitute LPG by changing only some of the existing infrastructure.
DME plant is established in Cilegon, West Java, with a capacity of
22500 tonnes / year (2,841 tons / day).
The plant uses a process technology from JFE Direct Contact(Jeifui).
The first stage is pre-treatment process to remove H2S content in
Natural Gas. The second stage is the reforming process for converting
natural gas into synthesis gas (syngas) at a temperature of 800oC and a
pressure of 30 bar and produce a residual gas that is named a flue gas
used for supply heat to the heaters and steam reforming. The third stage
is the main direct process to convert synthesis gas (syngas) of CO and
H2 into the DME product at a temperature of 260oC and a pressure of
50 bar. The fourth stage is the process of syngas separation from the
product of DME in Flash Separator. Then, the purification process is
carried out by distillation at a pressure of 11 bar to produce quality
99% DME with water and methanol 1% as impurities.
To achieve the DME production capacity, this plant requires a
major raw material of natural gas as much as 2,841 tons / day. Factory
utility requirements, ie 2,03 m3/days sanitation water; 463,47 m3/days
cooling water, and 90 m3/days boiler feed water
| Item Type: | Thesis (Diploma) |
|---|---|
| Additional Information: | RSK 661.84 Rat p |
| Uncontrolled Keywords: | DME, Direct contact, Gas alam, Kapasitas |
| Subjects: | T Technology > TP Chemical technology > TP350 Natural gas--Drying. |
| Divisions: | Faculty of Industrial Technology > Chemical Engineering > 24401-(D3) Diploma 3 |
| Depositing User: | ansi aflacha |
| Date Deposited: | 24 Jun 2020 02:55 |
| Last Modified: | 24 Jun 2020 02:55 |
| URI: | http://repository.its.ac.id/id/eprint/76221 |
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