Дегидрогенизация пропана молекулами СО[2]. Экспериментальное и термодинамическое рассмотрение
Полученные результаты согласуются с термодинамическими расчетами, которые дают такую же тенденцию изменения соотношения H[2]/CO для двухстадийного процесса дегидрогенезации пропана молекулами СО[2].
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DEHYDROGENATION OF PROPANE WITH CO2 - EXPERIMENTAL AND THERMODYNAMIC
CONSIDERATIONS
ДЕГИДРОГЕНИЗАЦИЯ ПРОПАНА МОЛЕКУЛАМИ СО2. <...> ЭКСПЕРИМЕНТАЛЬНОЕ И
ТЕРМОДИНАМИЧЕСКОЕ РАССМОТРЕНИЕ
(Institute of Organic Chemistry and Technology, Cracow University of Technology)
e-mail: pmichor@usk.pk.edu.pl
The dehydrogenation of propane with CO2 over Cr-containing SBA-1 mesoporous material
(Cr5/SBA-1) has been investigated. <...> The effect of temperature and feed gas composition on the conversion
of propane and carbon dioxide as well as on the ratio of H2/CO has been carefully study. <...> It
has been found that over the Cr5/SBA-1 catalyst the ratio of H2/CO rises with temperature and drops
with the increase of CO2/C3H8 ratio in the feed gas. <...> The catalytic results are in agreement with the
thermodynamic calculations that shows similar trend of the H2/CO ratio change for two-step pathway
of propane dehydrogenation with CO2. <...> Влияние температуры и состава питающего газа
на конверсию пропана и диоксида углерода, также как и на соотношение H2/CO было тщательно
исследовано. <...> Key words: Dehydrogenation of propane; Thermodynamic considerations; Chromium oxide catalysts;
Propene; Carbon dioxide
Ключевые слова: дегидрогенизация пропана, термодинамическое рассмотрение, катализатор
на основе оксида хрома, двуокись углерода
INTRODUCTION
Dehydrogenation of propane with CO2 has
been recently considerate as an alternative technology
for non-oxidative dehydrogenation of propane. <...> In
the new process with CO2, propene is obtained with
higher yield than in the traditional one. <...> Chromium oxide based materials are considered
as ones of the most promising catalysts for dehydrogenation
of light alkanes with CO2 [4-10]. <...> It could therefore be concluded that in order
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to obtain more active chromium oxide-based catalyst
for the dehydrogenation of propane dispersion of the
chromium oxide species at Cr loadings as high as
possible should be achieved. <...> For this reason, more
attention has been dedicated recently toward mesoporous
materials, which are characterized by high
surface areas (2-3 times higher than traditional silica
supports) as well as uniform pore size. <...> Up to now
chromium oxide catalysts supported on different mesoporous
materials, such as: MCM-41 [6-8], SBA-15
[9], MSU-x [10] have been investigated in the dehydrogenation
of propane to propene in the presence of
CO2. <...> In this paper we discussed the effect of feed
gas composition <...>
** - вычисляется автоматически, возможны погрешности
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