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Oxidative Dehydrogenation of Light Alkanes to Olefins

From a theoretical point of view, the most interesting catalytic process to obtain olefins from their corresponding alkanes would be catal3hic dehydrogenation (CDH), since in this process hydrogen (with a high value as an energy source) is also produced Alkane Olefin -I- H2. [Pg.789]

Currently, this process is employed to produce propylene (lower than 2% of world production), butenes, butadiene, isobutene, and styrene, operating at high temperatures (550-600°C). Nevertheless, this reaction carries the drawback of being an endothermic process (positive formation enthalpy, AG, of 132,119, and 116 kJ/mol, for ethane, propane, and -butane, respectively). Moreover, undesired reactions occur such as cracking of both paraffins and olefins and especially coke formation which blocks the catalyst s active sites, causing deactivation. [Pg.789]

An alternative to the catalytic dehydrogenation process is the ODH of the alkane in order to produce the corresponding olefin Alkane -h O2 Olefin - - H2O. [Pg.789]

Therefore, ODH processes offer the possibility of reducing costs due to energy savings, as the operation takes place at lower temperatures, and also due to the absence of the expensive separation steps of by-products. In fact, the main studies of alkane oxidation in the open literature have been focused on ODH reactions, especially for propane ODH (Fig. 24.1). [Pg.790]

Unfortunately, some doubts have been raised regarding the competitiveness of the ODH processes as the yields to olefin obtained to date are not high enough to replace the conventional processes. Moreover, it has been suggested that yields to olefin of around 65% could be competitive and would be interesting for the establishment of an industrial ODH process. However, we must emphasize that not all the hydrocarbons studied behave in the same way. Thus, as will be commented on in the following section, the reported yields to ethylene have nothing to do with the yields to propylene and isobutene. [Pg.790]


See other pages where Oxidative Dehydrogenation of Light Alkanes to Olefins is mentioned: [Pg.113]    [Pg.789]   


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Alkane, dehydrogenation

Alkanes light

Alkanes olefins

Alkanes, light, oxidative dehydrogenation

Dehydrogenation of alkanes

Light olefins

Olefin oxide

Olefinations oxidative

Olefines, oxidation

Olefins dehydrogenation

Olefins, oxidation

Oxidation of alkanes

Oxidation of light alkanes

Oxidative alkanes

Oxidative dehydrogenation

Oxidative dehydrogenation of alkane

Oxidative dehydrogenations

Oxidative olefin

Oxidative olefination

To light

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