Evgeny Belopukhov | The University of Manchester (original) (raw)

Papers by Evgeny Belopukhov

Согласно техническому регламенту Таможенного союза [1] с 1 января 2015 г. в России вступают в дей... more Согласно техническому регламенту Таможенного союза [1] с 1 января 2015 г. в России вступают в действие требования к автобензину класса 4, а через год -класса 5. Одним из основных требований является ограничение по содержанию в автобензинах ароматических углеводородов, в том числе бензола, в количестве 35,0 и 1,0 об.% соответственно. Следует отметить, что базовым компонентом автобензина является продукт процесса каталитического риформинга -риформат, который в зависимости от качества исходного сырья и жесткости процесса содержит 65-70 мас.% ароматических углеводородов, в том числе 2-6 мас.% бензола. Средняя доля риформата на НПЗ России составляет 50 % и достигает 70-75 % в случае отсутствия на заводе процесса каталитического крекинга, то есть на каждом втором предприятии [2, 3]. Таким образом, содержание ароматических углеводородов и бензола в риформате определяет их уровень и в товарном автобензине.

Pt/MOR/Al 2 O 3 catalysts with mordenite zeolite contents of 10 to 50 wt % are prepared. Solution... more Pt/MOR/Al 2 O 3 catalysts with mordenite zeolite contents of 10 to 50 wt % are prepared. Solutions of H 2 PtCl 6 and [Pt(NH 3 ) 4 ]Cl 2 are used as precursors of Pt. It is shown by means of transmission electron microscopy (TEM) that the localization of platinum on a MOR/Al 2 O 3 mixed support depends directly on the nature of the metal's precursor. The catalysts are tested in the isomerization of n heptane. It is shown that the best samples of catalysts provide yields of the target products (dimethyl and trimethyl substituted isomers of heptanes) on the level of 21 wt % at a temperature of 280°C, while those of a C 5+ stable catalyzate are on the level of 79-82 wt %. The catalysts can be used to improve the environmental friendliness of gasolines by employing them in the isomerization of the 70-105°C fraction of directly distilled gasoline.

Benzene hydroisomerization is among the promising processes converting benzene into methyl cyclop... more Benzene hydroisomerization is among the promising processes converting benzene into methyl cyclopentane (MCP), which is an environmentally friendlier, octane boosting component of motor fuels. Benzene hydroisomerization into MCP over the Pt/MOR/Al 2 O 3 (MOR = mordenite) catalytic system is reported here. The dependence of the yield of the target product on the acidic properties of the support and platinum precursor ([Pt(NH 3 ) 4 ]Cl 2 or H 2 PtCl 6 ) have been investigated in order to optimize the catalyst com position. The acidic properties of the surface have been altered by introducing 30-95 wt % alumina into the sup port. Catalytic activity has been measured in the hydroisomerization of cyclohexane and a benzene (20 wt %) + n heptane (80 wt %) mixture in a flow reactor at 250-350°C, 1.5 MPa, H 2 : CH = 3 : 1, a cyclohexane LHSV of 6 h -1 , a mixed feedstock LHSV of 2 h -1 , a catalyst bed volume of 2 cm 3 , and catalyst pellet sizes of 0.25-0.75 mm. The most efficient catalyst for cyclohexane and n heptane isomerization and benzene hydroisomer ization is the platinum containing catalyst (0.3 wt % Pt) whose support consists of 30 wt % MOR and 70 wt % Al 2 O 3 . The highest yield of the target products of isomerization in the presence of this catalyst is attained in the temperature range from 280 to 310°C, which is thermodynamically favorable for MCP formation from benzene. This indicates that this catalyst is promising for the hydroisomerization of benzene containing gas oline fractions. Use of H 2 PtCl 6 , a readily available chemical, as the platinum precursor is favorable for com mercialization of the catalyst and ensures price attractiveness in its industrial scale manufacturing.