Metal-catalyzed cross-coupling reactions with supported nanoparticles: Recent developments and future directions

Barros, Suellen D. T. de; Senra, Jaqueline D.; Lachter, Elizabeth R.; Malta, Luiz Fernando B.

doi:10.1080/01614940.2016.1202640

Cited by 21 publications

(7 citation statements)

References 162 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The critical process parameters for the isomerization of the LSRN are temperature, pressure, liquid hourly space velocity (LHSV), feedstock composition, H 2 /hydrocarbon ratio and catalyst promoter [1]. The temperature of the process should be kept low as isomerization is an exothermic reaction and rate of isomerate formation will increase the temperature of the process, but it should not be kept too low that the activity of the catalyst would decrease to a greater extent [2][3][4]. There should be an optimum value of pressure that is 45 psig.…”

Section: Process Variables For Isomerizationmentioning

confidence: 99%

“…As a result, restrictions are imposed on gasoline to reduce its benzene, cyclic compounds, heavy aromatics, and olefin concentrations along with the removal of tetramethyl lead [2]. However, the octane number of aromatics and olefins is relatively high, so reducing their concentration in gasoline causes a decrease in octane number and, consequently, fuel quality [3,4]. Therefore, the process of isomerization is gaining significant attention in the petroleum refineries to increase the fuel octane number [5].…”

Section: Introductionmentioning

confidence: 99%

“…The process of light naphtha isomerization mainly bases on the chlorinated platinum promoted alumina catalysts [3]. These active catalysts function even at a low temperature, which is a favorable condition for the process of isomerization.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

New trends in improving gasoline quality and octane through naphtha isomerization: a short review

et al. 2018

View full text Add to dashboard Cite

The octane enhancement of light straight run naphtha is one of the significant solid acid catalyzed processes in the modern oil refineries due to limitations of benzene, aromatics, and olefin content in gasoline. This paper aims to examine the role of various catalysts that are being utilized for the isomerization of light naphtha with an ambition to give an insight into the reaction mechanism at the active catalyst sites, and the effect of various contaminants on catalyst activity. In addition, different technologies used for isomerization process are evaluated and compared by different process parameters.

show abstract

Section: Process Variables For Isomerizationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

New trends in improving gasoline quality and octane through naphtha isomerization: a short review

et al. 2018

View full text Add to dashboard Cite

show abstract

“…There have been many types of modifications to achieve an acid catalyst site, one of which is the Gheit et al, 2014;Ejtemaei et al, 2017), and hexane (Bikmetova et al, 2016). High selectivity of light paraffin isomerization was obtained at low temperatures (de Barros et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

A Review on the Hydroisomerisasion of n-Parafins over Supported Metal Catalysts

Safaat

Adilina²,

Tursiloadi³

2021

J. Rek. Pros.

View full text Add to dashboard Cite

Catalytic hydroisomerization of n-paraffin aims to produce branched paraffin isomers and suppress cracking reactions in the production of the low cloud point of biodiesel. The development of the type of metal and catalyst support, amount of metal loading, and reaction conditions are important to increase the catalyst activity. A high performace catalyst for hydroisomerization bears bifunctional characteristics with a high level of hydrogenation active sites and low acidity, maximizing the progress of hydroisomerization compared to the competitive cracking reaction. In addition, a catalyst support with smaller pore size can hinder large molecular structure isoparaffins to react on the acid site in the pore thus providing good selectivity for converting n-paraffin. Catalysts loaded with noble metals (Pt or Pd) showed significantly higher selectivity for hydroisomerization than non-noble transition metals such as Ni, Co, Mo and W. The reaction temperature and contact time are also important parameters in hydroisomerization of long chain paraffin, because long contact times and high temperatures tend to produce undesired byproducts of cracking. This review reports several examples of supported metal catalyst used in the hydroisomerization of long chain hydrocarbon n-paraffins under optimized reaction conditions, providing the best isomerization selectivity results with the lowest amount of byproducts. The role of various metals and their supports will be explained mainly for bifunctional catalysts.

show abstract

“…Especially noteworthy are reactions furnishing carbon-carbon bonds, regarded as one of the most challenging tasks in organic synthesis. C–C Cross-coupling protocols developed by Suzuki [ 1 ], Heck [ 2 ], and Sonogashira [ 3 ], among others, changed the way in which organic synthesis is conceptualized, endowing a practical synthetic route for the direct formation of C–C bonds [ 4 , 5 , 6 ].…”

Section: Introductionmentioning

confidence: 99%

New Trends in C–C Cross-Coupling Reactions: The Use of Unconventional Conditions

Andrade

Martins

2020

Molecules

View full text Add to dashboard Cite

The ever-growing interest in the cross-coupling reaction and its applications has increased exponentially in the last decade, owing to its efficiency and effectiveness. Transition metal-mediated cross-couplings reactions, such as Suzuki–Miyaura, Sonogashira, Heck, and others, are powerful tools for carbon–carbon bond formations and have become truly fundamental routes in catalysis, among other fields. Various greener strategies have emerged in recent years, given the widespread popularity of these important reactions. The present review comprises literature from 2015 onward covering the implementation of unconventional methodologies in carbon–carbon (C–C) cross-coupling reactions that embodies a variety of strategies, from the use of alternative energy sources to solvent- free and green media protocols.

show abstract

Metal-catalyzed cross-coupling reactions with supported nanoparticles: Recent developments and future directions

Cited by 21 publications

References 162 publications

New trends in improving gasoline quality and octane through naphtha isomerization: a short review

New trends in improving gasoline quality and octane through naphtha isomerization: a short review

A Review on the Hydroisomerisasion of n-Parafins over Supported Metal Catalysts

New Trends in C–C Cross-Coupling Reactions: The Use of Unconventional Conditions

Contact Info

Product

Resources

About