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Sains Malaysiana 45(11)(2016):
1707–1714 Bulk CO2/CH4 Separation
for Offshore Operating Conditions using Membrane Process (Pemisahan Pukal CO2/CH4 untuk Keadaan Operasi Luar Pesisir menggunakan
Proses Membran) NORWAHYU JUSOH,
KOK
KEONG
LAU*,
YIN
FONG
YEONG
& AZMI M. SHARIFF Chemical Engineering
Department, Universiti Teknologi PETRONAS,
32610 Seri Iskandar, Perak Darul Ridzuan, Malaysia Received: 6 April
2015/Accepted: 30 March 2016 ABSTRACT The increasing demands of natural
gas pushes energy industries to explore the reservoirs contain
high CO2 concentration
and impurities including heavy hydrocarbons. High efficiency of
using membrane technology in CO2-natural gas separation
has extended its potential application to offshore environment.
Due to the limited studies related with the separation of CO2 under
offshore conditions, the present work has investigated the separation
performance of a commercial membrane in removing bulk CO2 from
methane at elevated pressure condition. A wide range of offshore
operating conditions including, pressure from 10 to 50 bar, CO2 concentration
from 25 to 70% and temperature of 30oC, 40oC
and 50oC were studied. High relative CO2 permeance
and relative CO2/CH4 selectivity
were observed when the pressure and the CO2 concentration
increased. This work, therefore substantial is to bridge the gap
and facilitates the application of membrane technology for offshore
operating conditions. Keywords: Bulk CO2;
membrane process; natural gas separation ABSTRAK Peningkatan permintaan terhadap
gas asli telah mendorong industri tenaga untuk meneroka takungan
yang mengandungi kepekatan CO2 dan
bendasing yang tinggi termasuk hidrokarbon berat. Kecekapan tinggi
dalam penggunaan teknologi membran dalam pemisahan CO2-gas
asli telah meningkatkan potensi aplikasi kepada persekitaran luar
pesisir. Disebabkan kajian yang berkaitan dengan pemisahan CO2 di
luar pesisir yang terhad, kajian terkini telah mengkaji prestasi
pemisahan membran komersial dalam mengeluarkan CO2 pukal
daripada metana pada keadaan tekanan yang tinggi. Pelbagai keadaan
operasi luar pesisir termasuk tekanan dari 10 kepada 50 bar, kepekatan
CO2 dari
25% ke 70% dan suhu 30°C, 40°C dan 50°C telah dikaji. Ketelapan
relatif CO2 dan
kepemilihan CO2/CH4 relatif
yang tinggi telah diperhatikan apabila tekanan dan kepekatan CO2 meningkat.
Oleh itu, penyelidikan ini penting untuk merapatkan jurang dan
memudahkan penggunaan teknologi membran bagi keadaan operasi luar
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