English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

A novel process in which hydrogen and catalyst (in this study, NiMo supported nonacidic catalyst) coexisted and cooperated was developed. It was named hydrothermal cracking process. It was employed to perform liquid-phase cracking of vacuum gas oil (VGO) under 713K and 8.0MPa in a batch reactor. The results obtained were compared with those by simple thermal cracking under the same reaction conditions. The new process suppressed the naphtha yield (from 22.4 to 13.5wt%) but promoted the middle distillate yield (from 44.3 to 49.3wt%) while keeping similar conversion level (-65%). At the same conversion level, the yield ratio of middle distillates to naphtha for the new process was two times higher than that for the acid-catalyzed hydrocracking process. The hydrocracking of VGO over USYsupported NiMo proceeded at much lower temperatures but gave higher naphtha yields. Both the thermal cracking and hydrothermal cracking of n-dodecylbenzene (C6H5(CH2)11CH3) yielded toluene as the major aromatic product, whereas the hydrocracking of n-dodecylbenzene with NiMo/USY yielded benzene as the major aromatic product. The reaction mechanism of this process was assumed to consist of thermal cracking of hydrocarbon molecules via the free radical chain mechanism and catalytic hydroquenching of free radicals.

Hydrothermal Cracking of Vacuum Gas Oil for Producing Middle Distillates.