Effective Lifetime Study of Commercial Reverse Osmosis Membranes for Optimal Hydrogen Peroxide Ultrapurification Processes

Abstract

The present work is focused on the effective lifetime of reverse osmosis membranes when they are applied to the ultrapurification of aqueous hydrogen peroxide solutions, considering the very exigent purity requirements in such an oxidant medium. The comparison of commercial polyamide and cellulose acetate membranes was performed from experimental data of permeate flows and solute rejections. The obtained experimental results were adjusted to the Kedem−Katchalsky membrane transport model. The analysis of the time behavior of the membranes and the effective lifetime determination are essential in the evaluation of the economic aspects of the industrial scale installation as these properties determine the replacement rate of the membrane modules, especially for resulting extremely short effective lifetimes (only a few days). A logistic decay model was proposed for the description of the rejection coefficients of solutes as functions of the operating time. Lastly, an optimization routine was carried out to obtain optimum values for operation variables to maximize the economics of the hydrogen peroxide ultrapurification process.

Effect of Pretreatment of Nanocomposite PES‐Fe3O4 Separator on Microbial Fuel Cells Performance

“…PES displays excellent mechanical properties and a good thermal stability , but its resistance to powerful oxidants, such as hydrogen peroxide, can reduce the required membrane physicochemical properties due to a chemical degradation. The H 2 O 2 attack is supposed to result in loss of the SO bonds, with the conversion of the SO 2 group to charged SO 3 (sulfonate) groups , and related radicals attack on the PES . Similar cracks on PES membranes were also reported after exposure to NaOCl .…”

Hydrogen peroxide obtained via direct synthesis as alternative raw material for ultrapurification process to produce electronic grade chemical

“…The applied pressure was the only remaining operating variable and it was decided to simulate the process under 40 bar, the maximum pressure recommended by the manufacturer of the BE membranes. The Kedem–Katchalsky model parameters for BE membrane in hydrogen peroxide were taken from a previous study …”

“…Reverse osmosis membrane processes have demonstrated their technical and economic viability for hydrogen peroxide ultrapurification from technical grade chemical to semiconductor requirements . Both polyamide (PA) and cellulose acetate (CA) reverse osmosis membranes have been tested for this purpose . These types of membranes show very different characteristics, specifically when they are applied to separation processes in such an oxidant medium as concentrated hydrogen peroxide.…”

How Do Chemical Cleaning Agents Act on Polyamide Nanofiltration Membrane and Fouling Layer?

“…The free radicals produced from hydrogen peroxide not only degrade organic foulants but also attack the PA polymer segments, deteriorating the separation performance of the NF membrane (Reaction ). Abejón et al claimed that the PA NF membrane could only keep stable for 72 h in a high concentration (35% (w/w)) hydrogen peroxide solution, and prolonging immersion time would cause damage of the separation layer, resulting in a sharp increase of water permeability . Yu et al elucidated that some hydrogen peroxide would generate hydroxyl radicals through the Fenton reaction and react with the membrane or biofilm, and the residual hydrogen peroxide was degraded by peroxidase in bacteria or directly passed through the NF membrane, as shown in Figure …”