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- W1993411495 abstract "Skeletal isomerization of n-butane to isobutane has been studied with a flow reactor, mainly at 573 K, over caesium hydrogen salts of 12-tungstophosphoric acid (trihydrogen phosphododecatungstate), CsxH3–xPW12O40. The activity was highly dependent on the caesium content, being a maximum for x= 2.5 where the number of acid sites on the surface was greatest. The initial rate was first order with respect to the butane pressure (ca. 0.05–0.5 atm) at both 423 and 573 K on Cs2.5H0.5PW12O40. Cs2.5H0.5PW12O40 was found to be much more active and selective (83%cf. 60%) than SO42–/ZrO2 at the steady state at 573 K. H-ZSM-5 showed a higher activity than Cs2.5H0.5PW12O40 and SO42–/ZrO2 but the selectivity was only 14%. Cs2.5H0.5PW12O40 is a promising catalyst for this reaction and the low deactivation of Cs2.5H0.5PW12O40 is probably responsible for the high catalytic activity." @default.
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- W1993411495 title "Skeletal isomerization of n-butane over caesium hydrogen salts of 12-tungstophosphoric acid" @default.
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- W1993411495 doi "https://doi.org/10.1039/ft9959100367" @default.
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