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Arsenic removal from natural gas condensate using a pulsed sieve plate column and mass transfer efficiency
Author(s)
Chaturabul, Srestha
Wannachod, Pharannalak
Rojanasiraprapa, Bongkotch
Summakasipong, Supat
Lothongkum, Anchaleeporn W.
Pancharoen, Ura
Date Issued
February 1, 2012
Type
Article
Abstract
This work applied a pulsed sieve plate column in conjunction with liquid-liquid extraction technique to remove arsenic from natural gas condensate. The relevant parameters, that is the type and concentration of the extractant, pulse velocity, volumetric-flow rate ratio of the condensate to the extractant, operating time, and extraction cycle were investigated. Mass transfer efficiency in terms of the overall height of transfer unit (HTU oycm) and the interfacial area (m 2/m 3) were calculated. The highest percentage of arsenic removal in this study was 94% corresponding to the calculated HTU oy of 26 cm and the calculated interfacial area of 118 m 2/m 3 at the optimum conditions: the mixture of the extractant (1 M hydrochloric acid and 20% (v/v) methanol), pulse velocity of 20 mm/s, and volumetric-flow rate ratio of the condensate to the extractant of 1:4. By using continuous operation in the cycle mode, the percentages of arsenic removal were observed at 94, 85, and 80 from the respective 1st, 2nd, and 3rd cycles. The operation was based on the condition that fresh feed was introduced in each cycle while the extractant was reused. © Taylor and Francis Group, LLC.
Citation
Separation Science and Technology, 47(3), 432-439, 2012