Selective Extraction of Aromatics from Slurry Oil with Subcritical Water.

IF 4.2 2区化学 Q2 BIOCHEMISTRY & MOLECULAR BIOLOGY

Molecules Pub Date : 2025-05-07 DOI:10.3390/molecules30092079

Nuo-Xin Zhou, Zhu-Qi Liu, Meng-Han Zhu, Zi-Bin Huang, Jing-Yi Yang, Li-Tao Wang, Pei-Qing Yuan

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Abstract

The selective separation of aromatics from slurry oil (SLO)-a low-value byproduct of fluid catalytic cracking-remains a major industrial challenge. This study investigates the use of subcritical water (Sub-CW) as a green and tunable solvent to extract aromatics from SLO in a semi-batch system operating at 250-325 °C. At 325 °C and a water-to-oil mass ratio of 6:1, the extract yield reaches 16 wt%, with aromatic hydrocarbons accounting for over 90 wt% of the extract, predominantly composed of 3- to 4-ring polycyclic aromatic hydrocarbons. Comprehensive characterization via simulated distillation, SARA analysis, FT-IR, and ¹H-NMR confirms the selective enrichment of aromatics and effective separation from saturates and asphaltenes. To elucidate the molecular basis of this selectivity, principal component analysis of Hansen solubility parameters was performed. The results revealed a temperature-dependent solubility trend in Sub-CW, whereby the affinity for hydrocarbons follows the order aromatics > cycloalkanes > alkanes. This solubility preference, supported by both experimental data and theoretical analysis, offers new insight into subcritical solvent design and provides a basis for process intensification in SLO valorization.

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亚临界水选择性萃取油浆中的芳烃。

从泥浆油（SLO）中选择性分离芳烃（低价值的流体催化裂化副产物）仍然是一个主要的工业挑战。本研究研究了在250-325°C的半批处理系统中，使用亚临界水（Sub-CW）作为绿色可调溶剂从SLO中提取芳烃。在325℃、水油质量比为6:1的条件下，提取液得率可达16 wt%，其中芳烃占提取液的90%以上，主要为3 ~ 4环多环芳烃。通过模拟蒸馏、SARA分析、FT-IR和1H-NMR进行综合表征，证实了芳烃的选择性富集和饱和烃和沥青质的有效分离。为了阐明这种选择性的分子基础，对汉森溶解度参数进行了主成分分析。结果表明，在亚连续化学中，对烃类的亲和顺序为芳烃b>环烷烃>烷烃。这种溶解度偏好得到了实验数据和理论分析的支持，为亚临界溶剂设计提供了新的见解，并为SLO增值过程的强化提供了基础。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Molecules 化学-有机化学

CiteScore

7.40

自引率

8.70%

发文量

7524

审稿时长

1.4 months

期刊介绍： Molecules (ISSN 1420-3049, CODEN: MOLEFW) is an open access journal of synthetic organic chemistry and natural product chemistry. All articles are peer-reviewed and published continously upon acceptance. Molecules is published by MDPI, Basel, Switzerland. Our aim is to encourage chemists to publish as much as possible their experimental detail, particularly synthetic procedures and characterization information. There is no restriction on the length of the experimental section. In addition, availability of compound samples is published and considered as important information. Authors are encouraged to register or deposit their chemical samples through the non-profit international organization Molecular Diversity Preservation International (MDPI). Molecules has been launched in 1996 to preserve and exploit molecular diversity of both, chemical information and chemical substances.