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ISSN Online: 2377-424X

ISBN Print: 978-1-56700-474-8

ISBN Online: 978-1-56700-473-1

International Heat Transfer Conference 16
August, 10-15, 2018, Beijing, China

CFD SIMULATION OF EXHAUST REFORMING CHARACTERISTICS IN CATALYTIC FIXED BED REACTORS FOR A NATURAL GAS ENGINE

Get access (open in a dialog) DOI: 10.1615/IHTC16.cms.023341
pages 1761-1767

Аннотация

Coupled with detailed catalytic reaction mechanism, the exhaust reforming process in a fixed bed reactor was simulated using a porous media model to investigate the reforming characteristics under different initial conditions. The effects of gas hourly space velocity (GHSV), feed component, steam addition and wall temperature on the methane conversion rate, hydrogen yield and other characteristic parameters were analyzed. The simulation results show that the methane conversion and hydrogen production decreases with the rise of GHSV, while the molar ratio of H2 to CO increases first and then decreases. As the ratio of methane to exhaust increases, a higher molar fraction of hydrogen in the outlet can be achieved owing to a bigger proportion of partial reforming reaction of methane, and methane conversion rate decreases. It also suggests that a modest steam addition is preferable for both the reforming performance and the life span of the fixed bed.