@article { author = {Alimohammadi, Nemat and Fatthi, Sohrab}, title = {Comparing the Performance of Heterogeneous Pd-Supported Catalysts: Pd/ZSM-5, Pd/13X and Pd/Al2O3 for the Hydrogenation of Benzene in a Mixture of Normal Heptane and Benzene}, journal = {Iranian Journal of Chemical Engineering(IJChE)}, volume = {18}, number = {4}, pages = {3-19}, year = {2021}, publisher = {Iranian Association of Chemical Engineers(IAChE)}, issn = {1735-5397}, eissn = {2008-2355}, doi = {10.22034/ijche.2022.318553.1418}, abstract = {In the presented research, the selective hydrogenation of benzene in a mixture of benzene and normal heptane (5 vol % of benzene) over different kinds of heterogeneous catalysts was investigated. For this purpose, a series of catalysts with various supports such as Pd/ZSM-5, Pd/13X and Pd/  was developed. To prepare Pd supported catalysts, the modification of supports was conducted by a specified amount of palladium nitrate in the aqueous solution. Experimental catalyst evaluation tests were performed in the catalyst assessment set-up. The characterizations of the physicochemical properties of the prepared catalysts were performed by XRD, NH₃-TPD and BET. It can be found that the conversion of benzene was promoted under the optimized reaction conditions of 200 °C, 1 MPa, H2/HC = 1.3 (molar ratio) and the weight hourly space velocity (WHSV) = 25 hr-1. Among these catalysts, Pd/13X exhibited the maximum conversion of benzene (90 %) and the minimum light-cut production under the optimum conditions. The study on the stability of catalysts shows that, the decline activity of Pd/13X catalyst is more than that of the other catalysts (from 90 % to 81 %) in the specified 20 h time on stream, but so far the activity of this catalyst is the highest in comparison with that of other catalysts at the end of the defined time (20 h).}, keywords = {Benzene hydrogenation,Heterogeneous catalyst,Catalytic Performance,Catalyst stability,Conversionof Benzene}, url = {https://www.ijche.com/article_147890.html}, eprint = {https://www.ijche.com/article_147890_9bea1d4e9617bb996150526344de1e34.pdf} }