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The effect on hydrogen transfer activity of catalytic cracking catalyst by heteropolyacid and hetero

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  • 更新日期:2011-10-29 15:12
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Abstract: To investigate the effect of heteropolyacid and heteropolyacid salt on catalyst cracking catalyst activity, selectivity and hydrogen transfer activity, different types of heteropolyacid and heteropolyacid salt were dispersed on the catalyst surface by dipping. The catalyst acidity was analyzed by in situ IR, the evalua-tion tests were carried out in fixed-fluidized bed and riser reactor, and the cracked gas composition was ana-lyzed by on-line GC. The results showed that catalyst cracking activity and hydrogen transfer activity were improved by heteropolyacid and heteropolyacid salt. When heteropolyacid content is 40μg/g feed, its acidity increased by 3 units, and the yield of light oil and total liquid enhanced by 1.36%(ω) and 2.24%(ω) respec-tively. When the mixture of  heteropolyacid and heteropolyacid salt content content is 40μg/gfeed, the yield of light oil and  total liquid enhanced by 1.90%(ω), 2.40%(ω), and alkene content in gasoline decreased by 5.37%(ψ). Keyword: catalytic cracking, hydrogen transfer, heteropolyacid, crack ability, acidity
 
 
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