化学工业与工程
Home  |   |  About Journal  |  Editorial Board  |  Instruction  |  Subscriptions  |  Download  |  Publication Ethics  |  Contacts Us  |  Chinese
Chemcial Industry and Engineering 2015, Vol. 32 Issue (2) :43-49,79    DOI: 10.13353/j.issn.1004.9533.2015.02.008
Article Current Issue | Next Issue | Archive | Adv Search << | >>
Supported Gas Membrane Process for Removal/Recovery of Ammonia from Wastewater by Using Dilute Nitric Acid as Absorbent
Hao Xingge1, Wang Yuanxi1, Li Haiqing1, Qin Yingjie1,2, Liu Liqiang2, Cui Dongsheng2
1. School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China;
2. Chembrane Engineering & Technology, Inc., Tianjin 300308, China

Abstract
Reference
Related Articles
Download: PDF (2166KB)   HTML 1KB   Export: BibTeX or EndNote (RIS)      Supporting Info
Abstract In this study, the feasibility and long-term operational stability of PTFE hydrophobic microporous hollow fiber-based supported gas membrane process is demonstrated by using dilute nitric acid as absorbent solution to remove/recover ammonia from a wastewater stream. Under similar operation conditions, the separation performance of three kinds of membrane contactors made from PTFE, PP and PVDF were compared; the influence of inlet feed concentration, velocity and temperature on the mass transfer performance of PP, PVDF and PTFE contactors was also studied. Experimental results showed that the lumen-side diameter and wall thickness of the hollow fibers were the most dominant factor influencing the mass transfer process, and that, the overall mass transfer coefficient K, membrane mass transfer coefficient kM, lumen-side mass transfer coefficient kL increased significantly with the increase of temperature. The long-term experimental results showed that the PVDF membrane contactor had a leakage problem after 7 days, the mass transfer coefficient of the PP membrane contactor had dropped notably after 20 days, while the PTFE membrane contactor still had a stable performance after running for 30 days. This study indicates that PTFE membrane has good resistance to nitric acid oxidation, it provides basic guarantee to remove/recover ammonia from wastewater (or chemical feed solution) streams as a by-product of ammonium nitrate by using gas supported membrane separation process.
Service
Email this article
Add to my bookshelf
Add to citation manager
Email Alert
RSS
Articles by authors
Keywords�� supported gas membrane��   PTFE��   nitric acid��   oxidation��   operational stability     
Received 2013-05-02;
About author:
Cite this article:   
Hao Xingge, Wang Yuanxi, Li Haiqing, Qin Yingjie, Liu Liqiang, Cui Dongsheng.Supported Gas Membrane Process for Removal/Recovery of Ammonia from Wastewater by Using Dilute Nitric Acid as Absorbent[J]  Chemcial Industry and Engineering, 2015,V32(2): 43-49,79
Copyright 2010 by Chemcial Industry and Engineering