CLEANING OF THE HEAT EXCHANGER FROM NaX ZEOLITE
Authors
Jalolidinov Zukhridin, Rayimjonov Burhonjon, Yusupov Shaxzod, Yusupov Farkhod
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In this study, the dissolution of NaX-type zeolite deposits from the surface of a heat exchanger was investigated using nitric acid solutions of varying concentrations. The main objective was to remove the zeolite layer without damaging the aluminum-based structure of the exchanger. Experimental results showed that a 42% nitric acid solution achieved complete dissolution of the zeolite within 30 minutes, without causing corrosion or damage to the metallic surface. In contrast, concentrations above 50% led to significant degradation of the aluminum surface. Post-dissolution analysis by Inductively Coupled Plasma Optical Emission Spectroscopy (ICPE-OES) confirmed the presence of aluminum (95.72%), sodium (2.44%), magnesium (1.17%), and calcium (0.67%) in the residual material, indicating effective removal of the zeolite phase and preservation of the heat exchanger material. These findings demonstrate that a controlled 42% nitric acid treatment provides an effective and safe method for restoring the operational capacity of aluminum-based heat exchangers fouled with NaX zeolite deposits.
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Authors
Jalolidinov Zukhridin, Rayimjonov Burhonjon, Yusupov Shaxzod, Yusupov Farkhod
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References:
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