Abstract:
:Deposition of carbonaceous compounds was used to improve the propylene selectivity of ZSM-5 by deactivating some acid sites meanwhile maintaining the high activity for methanol conversion. The carbonaceous species of pre-coked samples before and after MTP reactions were investigated by elementary analysis and thermogravimetric analysis (TGA). The results showed that pre-coke formed at low temperature (250°C) was unstable and easy to transform into polyaromatics species at the high reacting temperature, while combining 5% pre-coking process with 95% steam treatment at high temperature (480°C) was effective in inhibiting the formation of coke deposits and presented a significant improvement in the propylene selectivity.
journal_name
R Soc Open Scijournal_title
Royal Society open scienceauthors
Wang L,Qi J,Jiao H,An L,Guan C,Yong X,Jin Z,Zhang A,Liu Ddoi
10.1098/rsos.190218subject
Has Abstractpub_date
2019-09-04 00:00:00pages
190218issue
9issn
2054-5703pii
rsos190218journal_volume
6pub_type
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