Abstract
The paper compares conceptual designs of a microstructured reactor/heat-exchanger for the small-scale production of C8+ range hydrocarbons from methanol over H-ZSM-5 catalytic coatings. In these designs, air was used as a cooling fluid in the adjacent cooling channels. The heat transfer characteristics of a single-zone reactor (with channels 500 μm in diameter) and a two-zone reactor (with an additional coolant inlet) have been compared. A single reaction zone was not able to reduce the temperature gradient below 15 K, while a two-zone configuration, with a counter-current fluid flow in the upstream section and co-current flow in the downstream section, demonstrated a near-isothermal behaviour, with a mean temperature of 653 K.
Highlights
The implementation of large-scale infrastructure projects in the Arctic is impossible without a constant supply of fuels and lubricants, including special types of diesel fuels
Design and Reaction Kinetics microreactor/heat-exchanger (MRHE) device is constructed from individual microstructured plates
A microstructured device was designed for the conversion of methanol to C8 hydrocarbons, consisting of two sections of reactors/heat-exchangers, connected in series
Summary
The implementation of large-scale infrastructure projects in the Arctic is impossible without a constant supply of fuels and lubricants, including special types of diesel fuels. It becomes increasingly important to develop a technology capable of producing these fuels locally, as their transportation from refineries to remote areas substantially increases fuel costs. Many suppliers of natural gas operating in remote areas have significant supply of hydrocarbon feedstock (such as stable natural gas condensate) that cannot be used as commercial fuels without further processing. There is no commercial process to convert gas condensate directly to diesel fuels. A steam reforming process can be employed on a small scale [1] to convert the gas condensate to a mixture of hydrogen, CO, and CO2. The syngas produced is adjusted, sent for methanol synthesis, and further to the gasoline production step [2]
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