Adsorptive Desulfurization and Denitrogenation of Refinery Fuels Using Mesoporous Silica Adsorbents

Kwon, Jun Mi; Moon, Jong Ho; Bae, Yang‐Seop; Lee, Dong Geun; Sohn, Hyunchul; Lee, Chang Ha

doi:10.1002/cssc.200700011

Cited by 109 publications

(59 citation statements)

References 11 publications

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“…We have previously reported on the desulfurization and denitrogenation of light gas oil (LGO) using a silica-zirconia (Si-Zr) cogel [4]. In addition, zirconium-mesoporous silica (YSP-II) [7] and magnetite-mesoporous silica [16] were introduced for the denitrogenation of LGO and for the desulfurization of natural gas.…”

Section: Introductionmentioning

confidence: 99%

“…During catalytic hydrotreating (an integral step in the refinement of oil), denitrogenation (HDN) and desulfurization (HDS) are performed simultaneously. The ability to adsorb nitrogen compounds is generally higher when compared to aromatic thiophene derivatives, which have to compete with nitrogen compounds for active sites on catalysts during HDS processes [1,6,7]. In addition, the denitrogenation reaction (HDN) is the most difficult hydrotreatment reaction and slower than the desulfurization reaction (HDS).…”

Section: Introductionmentioning

confidence: 99%

“…Due to increasingly stringent environmental regulations for transportation fuels, the desulfurization and denitrogenation of fuels have become very important research topics in the production of clean automotive fuels with ultra-low sulfur levels [1][2][3][4][5][6][7]. According to the new environmental protection agency (EPA) Tier II regulations, the maximum allowable sulfur content in US diesel fuel is less than 15 ppmw (parts per million by weight).…”

Section: Introductionmentioning

confidence: 99%

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Denitrogenation of raw diesel fuel by lithium-modified mesoporous silica

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2010

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Section: Introductionmentioning

confidence: 99%

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Denitrogenation of raw diesel fuel by lithium-modified mesoporous silica

Koriakin

Ponvel

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2010

Chemical Engineering Journal

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“…[1][2][3] Nitrides contained in fuel may debase the properties and stability of oil products. 4 In addition, nitrides can lead to equipment damage and catalyst poisoning during further processing.…”

Section: Introduction Nmentioning

confidence: 99%

Core–Shell Magnetic Molecularly Imprinted Polymer Prepared for Selectively Removed Indole from Fuel Oil

Niu

Ni²,

Zhou

et al. 2015

Adv Polym Technol

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Magnetic molecularly imprinted polymers (MMIPs) were synthesized for selective recognition and rapid enrichment of indole from a model fuel. The MMIPs were synthesized by precipitation polymerization and a surface molecular imprinting technique, using indole as the template molecule, Fe 3 O 4 nanoparticles as magnetically susceptible components, methylacrylic acid as the functional monomer, and ethylene glycol dimethacrylate as a cross-linker. The properties of the MMIPs were characterized by Fourier-transform infrared spectroscopy, scanning electron microscopy, transmission electron microscopy, vibrating sample magnetometry, and thermogravimetric analysis. The adsorption capacity of indole-molecularly imprinted polymers (MIPs) was 50.25 mg g −1 at 303 K and reached adsorption equilibrium in a short time. Experimental data were modeled with a pseudo-second-order, Langmuir isotherm model. The selective adsorption performance of MIPs was favorable. C 2015 Wiley Periodicals, Inc. Adv Polym Technol 2015, 0, 21596; View this article online at wileyonlinelibrary.com.

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“…Silica has been studied in the denitrogenation by adsorption of a raw diesel 24 , and light gas oil (LGO) 25 , among other adsorption studies [26][27] , so, it will be interesting to study which of the three support possess a better adsorption performance, to impregnate it with nickel at 2, 4, 6% w/w and evaluate the π-complexation mechanism, using pyridine as a model molecule.…”

Section: +mentioning

confidence: 99%

Denitrogenation by Adsorption of Pyridine on Ni/Support Adsorbents

Peralta

Camu

Bassi

et al. 2016

J. Chil. Chem. Soc.

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In this work we have carried out the adsorption of pyridine using three different supports (activated carbon, SiO 2 and γ-Al 2 O 3 ). After choosing the best support, due to its higher adsorption capacity, we have impregnated the support with nickel at three different concentrations (2, 4 and 6% w/w) by wet impregnation to study the adsorption of pyridine by π-complexation. All the samples (supports and adsorbents) were characterized by N 2 adsorption-desorption by the BET method and electrophoretic migration. The experimental results, for the three different supports, show that the adsorption capacity is better for γ-Al 2 O 3, due to its higher isoelectric point. With the incorporation of nickel, no better adsorption capacities are observed, due that the nickel incorporation diminish the zero point charges of the adsorbents. Adsorption, denitrogenation, nickel, pyridine. e-mail: patricio.baeza@pucv.cl Keywords: INTRODUCTIONCrude oil is the largest and most widely used source of energy in the world and projections assure that this will continue until at least 2050. Overexploitation of existing fields, has led to crude oils known as "Barrel Fund", composed of high molecular weight hydrocarbons which are of lower quality, as they are much heavier and therefore difficult to purify in the petroleum refining industry. The combustion of petroleum containing nitrogen compounds emits NOx into the atmosphere, which directly contributes to the production of acid rain and Photochemical Smog. Therefore, environmental regulations are becoming more stringent with regard to the maximum level of nitrogen molecules that petroleum may contain; this has caused refiners to seek new methods that allow them to eliminate nitrogenous molecules. These nitrogen containing molecules are more resistant to the existing process used in the refining industry to remove them. This hydrotreating process is called hydrodenitrogenation (HDN) and it operates at elevated temperatures and pressures, which are efficient in removing simple nitrogen molecules, but not for the removal of "refractory molecules". Nitrogenous compounds present in the petroleum may vary depending on the origin of the oil field. Despite this, the predominant compounds consist of substituted pyrrole and pyridine, which containing aromatic rings of 5 and 6 members, respectively 1 . At present, petroleum is composed of alkylated nitrogenous organic molecules, on some part of the aromatic ring, which are refractory to the HDN process 2,3 .It should be noted that the catalysts used in petroleum refining for the HDN reaction are Ni-Mo/γ-Al 2 O 3 or Co-Mo/γ-Al 2 O 3 catalysts, where Co and Ni promote the activity of MoS 2 , but an important point is that these catalysts are also active in the hydrodesulfurization (HDS) reaction, and furthermore, both reactions are carried out in the same reactor with an unique catalyst, and in the case of nitrogen containing compounds, their removal is highly recommended to ensure successful HDS. It is these nitrogen compounds that inhibi...

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Adsorptive Desulfurization and Denitrogenation of Refinery Fuels Using Mesoporous Silica Adsorbents

Cited by 109 publications

References 11 publications

Denitrogenation of raw diesel fuel by lithium-modified mesoporous silica

Denitrogenation of raw diesel fuel by lithium-modified mesoporous silica

Core–Shell Magnetic Molecularly Imprinted Polymer Prepared for Selectively Removed Indole from Fuel Oil

Denitrogenation by Adsorption of Pyridine on Ni/Support Adsorbents

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