Removal of dissolved oxygen from water using a Pd-resin based catalytic reactor

Frontiers of Chemical Engineering in China - 2009
Wenxin Shi1, Chongwei Cui1, Liye Zhao2, Shuili Yu1, Xia Yun1
1State Key Laboratory of Urban Water Resources and Environment, School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin, China
2Heilongjiang Urban Planning and Surveying Design and Research Institute, Harbin, China

Tóm tắt

The removal of dissolved oxygen (DO) from water was studied experimentally in a Pd-resin base catalyst reactor using purified hydrogen gas as a reducing agent. The effects of various operating conditions, such as hydrogen and water flow rates, height of the catalytic resin bed, temperature, pH value and run time, on the removal of DO, had been studied extensively. The results shows that DO could be removed by the reactor from ppm to ppb levels at ambient temperature. Increases of temperature, H2 gas rate and the height of the catalytic resin were helpful to improve the DO removal rate. The change of pH value from 4 to 12 resulted in no effect on DO removal. Reaction time was the key factor to control the DO removal efficiency. Only when the reaction time was longer than 2.3 minutes under the experimental conditions, could a very low DO level be achieved.

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Frontiers of Chemical Engineering in China

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