Study of Catalytic Cracking of Asphaltene in Near-Critical Water

Abstract:

The method of solvent division is adopted to separate asphaltene from Shengli heavy oil by n-heptane. ¹HNMR and ¹³CNMR spectrum of asphaltene were determined with a Bruker Avance 400 NMR spectrometer. Combining with the elemental analysis results, the aromatic-ring structure is main structural composition in the asphaltene. Asphaltene was catalyzed and cracked with naphthenate nickel as catalytic cracking catalyst in near-critical water. The suitable reactional condition was obtained by orthogonal experiment method, reaction temperature 300°C, the mass fraction of catalyst used 0.6%, reaction time 24h. By testing element content of cracked asphaltene, carbon element content had reduced 0.06%~0.80%; hydrogen element content had reduced by 0.74%~3.41%; oxygen element content had reduced by 3.12%~27.1%; nitrogen element content had reduced by 0.40%~13.47%; sulfur element content had reduced by 9.85%~31.26%.

• Periodical: Advanced Materials Research (Volumes 860-863)
• Pages: 1021-1025
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.860-863.1021
• Online since: December 2013
• Authors: Jian Ping Yang
• Keywords: Asphaltene, Catalytic Cracking, Naphthenate Nickel, Near-Critical Water, n-Heptane

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