A process for the recovery of C.sub.4 hydrocarbons from a C.sub.5/C.sub.6 isomerization zone. A portion of the effluent stream from the C.sub.5/C.sub.6 isomerization zone comprising C.sub.4 hydrocarbons is combined in a stabilizer section with an effluent from a C.sub.4 isomerization zone. In order to increase the C.sub.4 hydrocarbons in the effluent stream from the C.sub.5/C.sub.6 isomerization zone, a chilling zone may be used.

A process for the recovery of C.sub.4 hydrocarbons from a C.sub.5/C.sub.6 isomerization zone. A portion of the effluent stream from the C.sub.5/C.sub.6 isomerization zone comprising C.sub.4 hydrocarbons is combined in a stabilizer section with an effluent from a C.sub.4 isomerization zone. In order to increase the C.sub.4 hydrocarbons in the effluent stream from the C.sub.5/C.sub.6 isomerization zone, a chilling zone may be used.

A process for producing aviation fuel and diesel from renewable feedstock is described. This process involves introducing the renewable feedstock into a hydrogenation and deoxygenation zone, and separating the hydrocarbon effluent from the hydrogenation and deoxygenation zone into an aviation boiling range fraction and a diesel boiling range fraction. The aviation boiling range fraction and diesel boiling range fraction are alternately sent to the isomerization and selective hydrocracking zone. This allows for lower severity isomerization and selective hydrocracking zone operating conditions when processing oils that naturally contain medium and long carbon chains (C.sub.8-C.sub.18), such as coconut or palm kernel oil. The lower severity operation results in decreased cracking, increasing the yield of aviation fuel product.

The disclosed invention relates to a process for converting ethylbenzene to styrene, comprising: flowing a feed composition comprising ethylbenzene in at least one process microchannel in contact with at least one catalyst to dehydrogenate the ethylbenzene and form a product comprising styrene; exchanging heat between the process microchannel and at least one heat exchange channel in thermal contact with the process microchannel; and removing product from the process microchannel. Also disclosed is an apparatus comprising a process microchannel, a heat exchange channel, and a heat transfer wall positioned between the process microchannel and heat exchange channel wherein the heat transfer wall comprises a thermal resistance layer.

A metal organic framework Fe.sub.2(bdp).sub.3 (BDP.sup.2=1,4-benzenedipyrazolate) with triangular channels is particularly suited for C5-C7 separations of alkanes according to the number of branches in the molecule rather than by carbon number. The metal-organic framework can offer pore geometries that is unavailable in zeolites or other porous media, facilitating distinct types of shape-based molecular separations.

Methods for utilizing carbon dioxide to produce multi-carbon products are disclosed. The systems and methods of the present disclosure involve: reducing CO.sub.2 to produce a first product mixture comprising an alcohol product mixture comprising one or more alcohols and a paraffin product mixture comprising one or more paraffins; dehydrating the alcohol product mixture to form an olefin product mixture comprising one or more olefins; oligomerizing the olefin product mixture to form a higher olefin product mixture comprising unsaturated paraffins and optionally aromatics; and reducing the higher olefin product mixture to form a higher hydrocarbon product mixture comprising unsaturated paraffins and optionally aromatics. Catalyst materials and reaction conditions for individual steps are disclosed to optimize yield for ethanol or jet fuel range hydrocarbons.