Popis: |
Supercritical water assisted aromatization (SCWA) using ZSM-5 was examined for conversion of dodecane and an atmospheric distillate into benzene, toluene, ethyl benzene, and xylene (BTEX) products. When compared with observations made in the absence of water, addition of 15 wt% or less water resulted in several benefits, including enhanced dodecane conversion rate, decreased formation of coke and coke precursors, and increased BTEX yields, retention of crystallinity (>90%), and retention of Bronsted acid site (BAS) density (60%). In contrast, addition of ≥ 25 wt% water resulted in reduced dodecane cracking rate, reduced aromatic production, decreased crystallinity ( |