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Electrochemical method for wet removal of phosphine
Author(s) -
Qu Guangfei,
Zhang Jian,
Lin Yilu,
Li Junyan,
Ning Ping,
Yu Yongtao
Publication year - 2015
Publication title -
environmental progress and sustainable energy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.495
H-Index - 66
eISSN - 1944-7450
pISSN - 1944-7442
DOI - 10.1002/ep.12169
Subject(s) - electrochemistry , electrolyte , chemistry , volumetric flow rate , anode , phosphine , aqueous solution , inorganic chemistry , phosphate , oxygen , supporting electrolyte , analytical chemistry (journal) , electrode , chromatography , catalysis , organic chemistry , physics , quantum mechanics
The removal of phosphine (PH 3 ) was studied with an electrochemical approach using a Ti/SnO 2 anode. The effects of the current density, O 2 content, gas flow rate, temperature, and type of electrolyte on the PH 3 removal were investigated. The liquid phase reaction products were detected by ion chromatography. It was observed that PH 3 was effectively removed in the electrochemical reactor and phosphate (PO 4 3− ) existed in solution after reaction. Increasing current density, oxygen content and reaction temperature can enhance the removal of PH 3 . 0ver 85% PH 3 was removed with an operation condition of current density of 53.05 mA/dm 2 , 65°C, 4.6 vol % O 2 and gas flow rate of 200 mL/min in 0.1 mol/L Na 2 SO 4 aqueous solution. Chosen Na 2 SO 4 as electrolyte, removal efficiency remained stability and it would be conducive to the recovery of phosphate (PO 4 3‐ ). The gas flow rate influence is remarkably clear in the reactor where it was evident that the most efficient gas flow rate toward a 90% PH 3 removal was reached at 50 mL/min. Electrochemical oxidation will be a potential method for the PH 3 removal because of its low cost, long duration removal efficiency and the valuable hydrogen byproduct produced. © 2015 American Institute of Chemical Engineers Environ Prog, 34: 1640–1646, 2015