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Method and characterisation energy transferred to the powder from the grinding media during the process. The energy transfer is directed by many parameters such as the type of material, milling speed (rpm), time of ball milling process, and the size of the milling media. The ball (125.0 ml) to powder (62.5 ml) volume ratio was (2:1). Mordenite was ball-milled using the following steps: 62.5 ml of mordenite was measured by graduate cylinder. 62.5 ml of DI H2O was added to mordenite and placed in ball-milled bottle. 125 ml of metallic grinding media was used during the process. Ball-milling speed and time were 140 rpm 24 hr respectively Mixture was centrifuged for 12 minutes at 10500 rpm Filtered and washed with DI water and ethanol Mordenite was dried for 24hr at drying cabinet (40°C) Sieved through mesh, and stored for future treatment. 3.5.3 Protonation of Mordenite The purchased mordenite of this work was in the sodium (Na+ MOR) form. After ball-milling process, the mordenite was mixed with an acid to exchange the sodium ions with H+ to form H-MOR. Exchanging the Na+ ions with H+ may provide an ionic path for the protons (at anode surface) to transport from the anode to the cathode in through the mordenite channels in the modified layer. The protonation of mordenite was carried through ion exchange with sulfuric acid. The following steps were made to mordenite to exchange the sodium ion in mordenite with hydrogen proton: Mordenite (2 g) and 1.0 M of H2SO4 (100 ml) was placed in conical flask The flask was placed on magnetic stirrer and mixed for 24 hr at room temperature Mixture was filtered and washed by DI water and ethanol several time The protonated mordenite was then placed in drying cabinet for 24hr at 40°C Sample was ground via mortar and sieved through screen mesh Sample was labeled as H-MOR and kept ready for further treatment. Sirhan AL-Batty Page 107PDF Image | Membrane Electrode Assembly Modification by Zeolite and Graphene Oxide
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