Separation of solvent and deasphalted oil for solvent deasphalting process

Jung Moo Lee, Sangcheol Shin, Seonju Ahn, Jeong Hwan Chun, Ki Bong Lee, Sungyong Mun, Sang Goo Jeon, Jeong Geol Na, Nam Sun Nho

Research output: Contribution to journalArticlepeer-review

27 Citations (Scopus)

Abstract

Due to the depletion of conventional oil resources and increasing prices, various technologies for utilizing unconventional oil and low-value crude residues, which have not been fully exploited, are currently being explored. The exploitation of unconventional oil and low-value crude residues requires upgrading processes such as carbon rejection and hydrogen addition. Among many existing upgrading processes, solvent deasphalting (SDA), a technology for removing asphaltene-rich pitch and producing higher-value deasphalted oil (DAO) by using paraffinic solvents, is promising because it offers the advantages of low installation cost and flexibility in terms of the control of the quality of pitch and DAO. The SDA process requires a considerable amount of expensive solvent. Thus, solvent recovery, an energy-intensive process, is required for improved efficiency. In this paper, DAO/solvent separation experiments were carried out using two solvents, pentane and hexane, to investigate the effect of operating conditions such as temperature, pressure, and DAO/solvent ratio on the process. The DAO/pentane separation was superior to the DAO/hexane separation under similar conditions. Regardless of the solvent type, solvent recovery was increased as the DAO/solvent ratio in the feed was decreased. Solvent recovery was strongly influenced by variations in temperature but was relatively insensitive to changes in pressure.

Original languageEnglish
Pages (from-to)204-210
Number of pages7
JournalFuel Processing Technology
Volume119
DOIs
Publication statusPublished - 2014 Mar

Keywords

  • Deasphalted oil
  • Hexane
  • Pentane
  • Separation
  • Solvent deasphalting

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Fuel Technology
  • Energy Engineering and Power Technology

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