Determination of nitrogen-containing polycyclic aromatic compounds in diesel and gas oil by reverse-phase high performance liquid chromatography using introduction of sample as detergentless microemulsion

Cunha, Alessandra L. M. C. da; Sá, Anastácia; Mello, Selma Cunha; Vásquez-Castro, Yaneth E.; Luna, Aderval S.; Aucélio, Ricardo Q.

doi:10.1016/j.fuel.2016.02.035

Cited by 14 publications

(5 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…S3; Liu et al 2016), a tricyclic carbazole and a potent procarcinogenic component of tobacco smoke particulate matter, diesel fuel, domestic and industrial wastewater, and other sources of pollutant emissions (e.g. da Cunha et al 2016). Carbazoles are characterized by an indole moiety annulated with a benzene ring, but originate from the anthranilic acid pathway via a 3-prenylquinolon and a 2-prenylindole to 3-methylcarbazole.…”

Section: Monoterpene-indole Alkaloids From Psychotria Pilifera?mentioning

confidence: 99%

A revised classification of the sister tribes Palicoureeae and Psychotrieae (Rubiaceae) indicates genus-specific alkaloid accumulation

et al. 2021

View full text Add to dashboard Cite

Tribes Palicoureeae and Psychotrieae (Rubiaceae, Gentianales) are complex and speciose sister groups with a pantropical distribution. Since the initial studies on ipecacuanha more than two centuries ago, species of the group have been subject to numerous phytochemical studies yielding diverse specialized ("secondary") metabolites, most of them alkaloids. However, the generic limits within the tribes have long been unclear and only recently, monophyletic genera have been delimited and segregated from a once broadly circumscribed Psychotria. Thus, a phylogeny-based and taxonomically updated review of phytochemical literature was performed which allowed assigning the bulk of phytochemical data previously reported for Psychotria to various segregate genera such as Carapichea, Eumachia and Palicourea. This review not only challenges the common perception of Psychotria as a monoterpene-indole alkaloid-rich genus. It also highlights that each of its relatives differs by accumulating specific groups of alkaloids, which is of major importance for understanding animal-plant interactions such as herbivory, as well as for drug discovery. The alkaloid complement of each of these genera is here enumerated and discussed, which should provide a framework for future studies addressing the biosynthesis, evolution, ecological and pharmacological significance of specialized metabolite differentiation in this abundant, ecologically and ethnopharmacologically important group.

show abstract

Section: Monoterpene-indole Alkaloids From Psychotria Pilifera?mentioning

confidence: 99%

A revised classification of the sister tribes Palicoureeae and Psychotrieae (Rubiaceae) indicates genus-specific alkaloid accumulation

et al. 2021

View full text Add to dashboard Cite

show abstract

“…The previously discussed examples in this section used normal phase chromatography, but a 2016 study used a reversed phase method to measure nitrogen PAHs in gas oils and diesel . Using reversed phase mode can be advantageous, as the separation mechanism relies more on the solubility of analytes in the stationary phase, rather than a surface adsorption effect .…”

Section: Separations By Target Analytementioning

confidence: 99%

“…32 The previously discussed examples in this section used normal phase chromatography, but a 2016 study used a reversed phase method to measure nitrogen PAHs in gas oils and diesel. 65 Using reversed phase mode can be advantageous, as the separation mechanism relies more on the solubility of analytes in the stationary phase, rather than a surface adsorption effect. 29 In this case, nitrogen-containing compounds are extracted from the samples into a detergentless microemulsion, and a C18 column with fluorescence detection was used to separate and quantify 10 nitrogen-containing species.…”

Section: Separation Sciencementioning

confidence: 99%

Applications of High Performance Liquid Chromatography in the Petroleomic Analysis of Crude Oil: A Mini-Review

Heshka

2021

Energy Fuels

View full text Add to dashboard Cite

High performance liquid chromatography (HPLC) is a well established analytical technique in the study of crude oil, and it has recently become more integrated within the field of petroleomics as a first step before high-resolution mass spectrometric analysis. This mini-review summarizes and discusses the applications of HPLC for the analyses of crude oil and its related products that have been published over the last 10 years. A brief introduction to separation science is provided, and applications are divided by compound class (group-type separations, heteroatoms, and other specialty analytes). Special attention is paid to applications that specifically couple to Fourier Transform ion cyclotron resonance mass spectrometry, and these are discussed in a separate section.

show abstract

“…The hydrodenitrogenation (HDN) process of nonheterocyclic nitrides (such as aliphatic amines) is very fast and does not affect the desulfurization process. Among heterocyclic nitrides, six-membered ring nitrides (such as quinoline, acridine) are basic, and five-membered ring nitrides, such as carbazole and indole, are nonbasic. ,, Tao et al investigated the HDS rate of Kuwait Straight run gas oil with a total sulfur content of 12 406 ppm on a Ni–Mo catalyst in the presence of quinoline and indole. Under 350 °C, when the nitride content is 100 ppm, the desulfurization rate of diesel under the action of quinoline is 78%, and when indole is present, the desulfurization rate of diesel reaches 92%.…”

Section: Hydrodesulfurization Reactionsmentioning

confidence: 99%

Ultradeep Hydrodesulfurization of Diesel: Mechanisms, Catalyst Design Strategies, and Challenges

Weng

Cao

Zhang

et al. 2020

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

With the increasingly strict diesel standards in the countries of the world, deep processing of diesel oil to ultralow sulfur levels is receiving more and more attention. This paper mainly reviews the reaction mechanism, catalysts, and process conditions of diesel hydrodesulfurization, and it provides new research directions for producing ultralow sulfur diesel (ULSD). In terms of mechanism, the sterically hindered sulfides, nitrides, aromatic compounds, and hydrogen sulfide affect the direct desulfurization and hydrogenate pathways of the hydrodesulfurization reaction to varying degrees. In order to eliminate these effects, the properties of high-dispersion active metals, large pore size, high specific surface area, high content of medium-weak acid, and a certain amount of Bronsted acid support are beneficial to further improve the activity of the catalyst, to produce ULSD that meets market demand. This article also reviews the influences of process conditions (for instance, temperature, hydrogen pressure, liquid hourly space velocity, and hydrogen consumption) on the diesel ultradeep hydrodesulfurization reaction, and it finds those moderately high temperatures and high hydrogen partial pressures, as well as low space velocity, to be beneficial. In short, the development of new catalysts is the current research hotspot in the field of ultradeep hydrodesulfurization of diesel, and further research is still needed.

show abstract

Determination of nitrogen-containing polycyclic aromatic compounds in diesel and gas oil by reverse-phase high performance liquid chromatography using introduction of sample as detergentless microemulsion

Cited by 14 publications

References 27 publications

A revised classification of the sister tribes Palicoureeae and Psychotrieae (Rubiaceae) indicates genus-specific alkaloid accumulation

A revised classification of the sister tribes Palicoureeae and Psychotrieae (Rubiaceae) indicates genus-specific alkaloid accumulation

Applications of High Performance Liquid Chromatography in the Petroleomic Analysis of Crude Oil: A Mini-Review

Ultradeep Hydrodesulfurization of Diesel: Mechanisms, Catalyst Design Strategies, and Challenges

Contact Info

Product

Resources

About