The hydrogenation of ethylbenzene to ethylcyclohexane over a nickel-mordenite catalyst is zero order in both reactants up to an ethylbenzene conversion of 75% [Ind. Eng. Chem. Res., 28 (3), 260 (1989)]. At 553 K, k = 5.8 mol ethylbenzene/(dm3 of catalyst·h). When a 100-ppm thiophene concentration entered the system, the ethylbenzene conversion began to drop.
The reaction was carried out at 3 MPa and a molar ratio of H2/ETB = 10. Discuss the catalyst decay. Be quantitative where possible.
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