CATEGORY: ETHANE
Ind. Eng. Chem. Res., 2014, 53 (15), pp 6358–6371, DOI: 10.1021/ie500391b
Influence of the Reactor Material Composition on Coke Formation
during Ethane Steam Cracking
Andrés E. Muñoz Gandarillas , Kevin M. Van Geem
, Marie-Françoise Reyniers *, and Guy B. Marin
Laboratory for Chemical Technology, Ghent University, Technologiepark 914,
B-9052 Gent, Belgium
MarieFrancoise.Reyniers@UGent.be
Abstract
Researchers studied the coking tendency of nine distinct
materials in a quartz electrobalance setup with a jet stirred reactor (JSR)
under industrially relevant ethane steam cracking conditions: Tmaterial
= 1159 K, Ptot = 0.1 MPa, χethane = 73%, dilution
δ = 0.33 kgH2O/kgHC.
They observed a strong influence of the
composition of the materials on the coking rate as a function of time
on-stream. The initial coking rate varied from 5 × 10–4 g·m–2·s–1
to 27 × 10–4 g·m–2·s–1, while the asymptotic
coking rate changed in the range of 2 × 10–4 g·m–2·s–1
to 6 × 10–4 g·m–2·s–1. SEM and EDX analyses of
coked and uncoked coupons revealed that the composition of the oxide layer in
contact with the cracked gas, formed after the initial preoxidation or
decoking, has an important influence on the amount of coke deposited. Materials
that formed a thin Al2O3 layer on the coupon surface exhibited
a higher coking resistance.
Full Text Source (Subscription or Fee): http://pubs.acs.org/doi/abs/10.1021/ie500391b
No comments:
Post a Comment