TY - JOUR AU - Jandosov, J. M. AU - Mansurov, Z. A. AU - Biisenbayev, M. A. AU - Ismagilov, Z. R. AU - Shikina, N. V. AU - Ismagilov, I. Z. AU - Konuspayeva, S. R. AU - Shaymardan, M. PY - 2012/02/15 Y2 - 2024/03/28 TI - Mesoporous Carbon-Based Rhodium Catalysts for Benzene Hydrogenation JF - Eurasian Chemico-Technological Journal JA - Eurasian Chem.-Technol. J. VL - 14 IS - 1 SE - Articles DO - 10.18321/ectj97 UR - https://ect-journal.kz/index.php/ectj/article/view/368 SP - 37-40 AB - <p>Two different carbons, namely CAS-P-500 and CRH-P-500, were prepared from apricot stones and rice husk by H<sub>3</sub>PO<sub>4</sub>-activation at 500 ºC and H<sub>3</sub>PO<sub>4</sub>/precursor (wt/wt) impregnation ratio of 2:1 followed by water washing and desilication by NaOH solution respectively. Elemental analyses of both samples using X-ray fluorescence spectroscopy and VARIO ELEMENTAR III elemental analyzer detected up to 1% of remained phosphorus and about 88% of carbon. SEM characterization and nitrogen adsorption data revealed that highly mesoporous materials were obtained. According to BJH scheme calculations, N<sub>2</sub> BET-surface area and pore volume for CAS-P-500 reached the values of 2030 m<sup>2</sup>/g and 1.64 cm<sup>3</sup>/g, while for CRH-P-500: 1690 m<sup>2</sup>/g and 1.95 cm<sup>3</sup>/g respectively. Activated carbons CAS-P-500 and CRH-P-500 were used as catalyst supports for the conversion of small amounts of benzene into cyclohexane to obtain cleaner gasoline. According to Euro-3 standards, gasoline should contain less than 1% of benzene, since the incomplete combustion of gasoline, which contains benzene, leads to formation of benzopyrene- a powerful carcinogen in exhaust gases. The activity of rhodium catalysts based on the CAS-P-500 and CRH-P-500 allow complete conversion of benzene into cyclohexane at 40 atm and 80oC temperature and is comparable to those of based on conventional carbons: “Sibunit”, etc.</p> ER -