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1CO2 UTILIZATION VALERY 1.5 Valery - Energy efficient synthesis of aliphatic aldehydes from alkanes and carbon dioxide: Valeradlehyde from butane and CO2 BMBF Project FKZ 033RC1011 Project Coordinator: Jennifer Julis, Evonik Creavis GmbH Project Partner: Leibniz-Institut für Katalyse e.V., CVT Chemical Engineering 1.5.1 Introduction The use of CO2 not only enables the return of the climate-relevant gas to the value chain, but offers an access to an alternative carbon source. CO2 is therefore an interesting C1 building block for chemical synthesis, which is available in an almost unlimited and cost-effective form. At the same time, however, CO2 is extremely stable and its conversion to higher-quality prod- ucts is a major challenge. In industry, there are therefore only a few examples of the successful industrial-scale use of CO2, for example the synthesis of urea (approx. 80 million t/a), methanol (approx. 2 million t/a), salicylic acid (approx. 0.025 million t/a) and cyclic carbonates (approx. 0.04 million t/a). Further industrial-scale applications would therefore be desirable. This gap needs to be closed by new industrially relevant processes in which CO2 is used as a source of carbon. The Valery project focused on the development of a new process for the pro- duction of basic chemicals on an industrial scale based on CO2. The basic idea was to combine the photocatalytic dehydrogenation of alkanes to ole- fins with the hydroformylation with CO2 in order to reach aldehyde. Alde- hydes are important intermediates in the petrochemical value chain. They are currently produced on a million ton scale by hydroformylation of olefins with synthesis gas (CO/H2). Substitution of olefins with considerably cheaper alkanes, as well as the use of CO2 instead of CO in synthesis gas, would not only be extremely interest- ing from an economic point of view, but at the same time would also enable greater raw material flexibility and greater independence from fossil raw materials. A few publications describe the hydroformylation of olefins with CO2. Tominaga et al. reported on the hydroformylation of linear alkenes with CO2 on ruthenium catalysts. However, the catalyst systems used so far showed only moderate chemical selectivity and activity, as well as increased 50PDF Image | Chemical Processes and Use of CO2
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