remove hf from bf 3 ma chunlei
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Remove HF from BF 3 Ma Chunlei. Reference 1: 柳彤 , 氟化钠吸附氟化氢最佳工艺参数测定 [J]. 舰船科学技术 , 2009, 31(2): 109-111. Content: Qualitative research: performance of HF adsorption on NaF pellets; Quantitative research: inlet concentration; inlet temperature; inlet pressure. Chemical adsorption: - PowerPoint PPT PresentationTRANSCRIPT
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Remove HF from BF3
Ma Chunlei
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Reference 1: 柳彤 , 氟化钠吸附氟化氢最佳工艺参数测定 [J]. 舰船科学技术 , 2009, 31(2): 109-111.
Content:Qualitative research: performance of HF adsorption on NaF pellets;Quantitative research: inlet concentration; inlet temperature; inlet pressure.
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Chemical adsorption: NaF + HF NaHF2
Reversible reaction:T>250 ℃ (280℃-300℃)
NaHF2 NaF + HF
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Fig. 1 Flow chart of adsorbent experiment
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Conclusion:
Fig. 2 Impact of temperature to efficiency
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Conclusion:
Fig. 3 Impact of pressure to efficiency
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Conclusion:
Fig. 4 Impact of flux to efficiency
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Reference 2: Afzal. S. & Rahimi. A. (2010). Experimental study of hydrogen fluoride adsorption on sodium fluoride. Journal of Industrial and Engineering Chemistry. 16, 147-151.
Purpose : Remove HF in F2
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Material :An adsorption column is made from stainless steel;A cylindrical shell is installed around the adsorption column;The outlet HF concentration is measured by a UV-IR analyzer;101-L capsule-Pure and vapor-free HF and N2
Nitrogen gas as inert;Sodium fluoride pellets;
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Tips:A constant flow rate;Water pass through the shell;The outlet concentration recorded continuously;Until the bed completely saturated;The inlet concentration of HF:2~15mol%;The experiments conducted at 22 and 54℃.
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Table 1Experimental conditions and results for column test runs.
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Fig. 2. Hydrogen fluoride isotherms on sodium fluoride at 22 and 54 ℃
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Fig. 3. Breakthrough curve of hydrogen fluoride adsorption on sodium fluoride.
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Fig. 4. Effect of temperature on the breakthrough curves of HF adsorption on NaF pellets.
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The breakthrough curves of HF adsorption on NaF pellets for different inlet concentrations.
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• Reference 3: Afzal. S. & Rahimi. A. (2010). Modeling hydrogen fluoride adsorption by sodium fluoride. Journal of Industrial and Engineering Chemistry. 16, 978-985.
• While the feed gas velocity decreases, the HF adsorption capacity on NaF is significantly enhanced and there is a delay in breakthrough time.
• The adsorption capacity of HF on NaF decreases slightly when inlet HF concentration increases.
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Thank you!