Oxidative Desulfurization of Diesel Fuel Using Three Kinds of Carboxylic Acids Supported by Iron(III) Chloride
Aqueous carboxylic acids (CA) are generally used as attractive catalytic extractants in the field of desulfurization of petroleum products. In the present study, a triple system consisting of CA-ferric chloride-hydrogen peroxide has been used for the removal of aromatic S-compounds from partially hy...
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| Format: | Article |
| Language: | English |
| Published: |
Erbil Polytechnic University
2021-06-01
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| Series: | Polytechnic Journal |
| Subjects: | |
| Online Access: | https://polytechnic-journal.epu.edu.iq/home/vol11/iss1/19 |
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| Summary: | Aqueous carboxylic acids (CA) are generally used as attractive catalytic extractants in the field of
desulfurization of petroleum products. In the present study, a triple system consisting of CA-ferric
chloride-hydrogen peroxide has been used for the removal of aromatic S-compounds from partially
hydrotreated diesel by liquid−liquid oxidative-extraction. The influence of various operating parameters
affecting the oxidative desulfurization was experimentally investigated. Formic acid (HCOOH), acetic
acid (CH3COOH), and propanoic acid (CH3CH2COOH) as aqueous solutions with hydrogen peroxide and
iron(III) chloride (FeCl3) as oxidant and catalytic agent, respectively, were used. All experiments were
carried out at 55°C with different oxidant to sulfur mole ratios (nH2O2/nS) (15–36), CA to sulfur mole
ratios (nCA/nS) (2–26), and oxidation reaction times (5–25 min). Within 25 min of the treatment, a
maximum elimination of aromatic S-compounds of 65.1% was obtained when molar ratio of oxidant to
sulfur (nH2O2/nS) was 36 and molar ratio of CA to sulfur (nCA/nS) was 26. Surface tension calculations
for the CAs demonstrated that the average void radius of the acids has a pronounced effect on the
fitting of S-compounds from diesel fuel into acids and is important to sulfur removal. Further, increasing
the desulfurization efficiency was also energetically affected in the presence of ferric halide. The
obtention of the sulfur removal ability value was noticeably higher than was achieved by employing
similar reaction conditions in the absence of FeCl3. |
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| ISSN: | 2707-7799 |