SO3H-bearing mesoporous carbon with highly selective catalysis

Suganuma, Satoshi; Nakajima, Kiyotaka; Kitano, Masaaki; Kato, Hideki; Tamura, Asako; Kondo, Hidesato; Yanagawa, Shinichiro; Hayashi, Shigenobu; Hara, Michikazu

doi:10.1016/j.micromeso.2011.03.028

Cited by 81 publications

(50 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Over 15 million tons of sulfuric acid is consumed annually as an unrecyclable catalyst, resulting in great environmental pollution. Preparation of environmentally friendly acid catalysts is highly demanded, and various solid acids have been developed for replacement of unrecyclable sulfonic acids [3][4][5]. Sulfonated carbonaceous materials are used in some of the most widely used methods to synthesize solid acids via carbonization and sulfonation [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Polyacrylonitrile fiber mat supported solid acid catalyst for acetalization

Shao

Xing

et al. 2012

Monatsh Chem

View full text Add to dashboard Cite

A novel polyacrylonitrile hybrid fiber mat supported solid acid catalyst was prepared by electrospinning, and its catalytic activities were carefully investigated through acetalization reactions. The results showed that this hybrid fiber mat exhibits high activity for the reactions, with average yields over 95%. Besides having catalytic activities similar to the solid acid, the heterogeneous solid acid/polyacrylonitrile mat can be reused in six runs without significant loss of catalytic activities. The large size of the hybrid fiber mat greatly facilitates recovery of the catalyst from the reaction mixture. The high and stable catalytic activities of the hybrid fiber mat hold great potential for green chemical processes and preparation of membrane reactors in the future.

show abstract

Section: Introductionmentioning

confidence: 99%

Polyacrylonitrile fiber mat supported solid acid catalyst for acetalization

Shao

Xing

et al. 2012

Monatsh Chem

View full text Add to dashboard Cite

show abstract

“…Carbonization of the resin precursors at 773 K, followed by sulfonation, resulted in an amorphous carbon with sulfonic acid groups and phenolic acid groups, but without COOH groups. Although the acid sites of the mesoporous carbon acid were somewhat weaker than bulk carbon-based acids from TMPO-adsorbed 31 P MAS NMR results, the mesoporous carbon acid showed good performance for α-methylstyrene dimerization as well as sulfonated carbon/mesoporous silica composite [74].…”

Section: Carbon-based Materialsmentioning

confidence: 91%

“…The carbon solid acids with micro-and mesopores were effective for Friedel-Crafts alkylation. Mesoporous carbon solid acids with uniform mesopores (10 nm) were synthesized using a resorcinol-formaldehyde resin [74]. Carbonization of the resin precursors at 773 K, followed by sulfonation, resulted in an amorphous carbon with sulfonic acid groups and phenolic acid groups, but without COOH groups.…”

Section: Carbon-based Materialsmentioning

confidence: 99%

Mechanistic Studies of Solid Acids and Base‐Catalyzed Clean Technologies

Takagaki

Nishimura

Ebitani

2013

Heterogeneous Catalysts for Clean Technology

View full text Add to dashboard Cite

IntroductionThe importance of solid acid and base catalysts in clean technologies has been recognized for a long time, and many books and reviews have been published since the text by Tanabe [1]. Tanabe et al.[2] revised their book in 1989, reviewing the definition and classification of solid acids and bases, determination of acidic and basic properties, and catalysis for isomerization, acylation, hydration of alkenes, methanol conversion, dehydration, dehydrogenation, esterification, hydrolysis, hydrocraking (hydrogenolysis), and oxidation reactions. The development of solid acid catalysts has been surveyed in several reviews [3][4][5][6][7][8][9][10]. Catalysis by solid bases and the mechanism of base-catalyzed reactions such as isomerization of alkenes and alkynes, aldol addition and aldol condensation, Henry reaction (nitro-aldol reaction), Knoevenagel condensation, Michael addition, the Tishchenko reaction, alkylation reactions, and addition reactions such as addition of amines to epoxides, transfer hydrogenation (Meerwein-Ponndorf-Verley (MPV) reaction), esterification and transesterification, and liquid-phase oxidations including Baeyer-Villiger oxidation and alkene epoxidation have been recently emphasized by Ono and Hattori [11], encompassing many splendid reviews and papers [12][13][14][15][16][17][18][19][20].The first part of this chapter is intended to survey recent literature on new catalytic materials because the development of new types of metal oxides and layered-and carbon-based materials with different morphologies opens up novel acid-base catalysis that enables new type of clean reaction technologies. Mechanistic considerations of acid-and base-catalyzed reactions should result in new clean catalytic processes for Green and Sustainable Chemistry, for example, transformations of biorenewable feedstock into value-added chemicals and fuels [21][22][23][24][25][26][27][28][29][30][31][32][33][34][35]. The latter part of this chapter, therefore, focuses on biomass conversion using solid acid and base catalysts, which covers recent developments on acid-base, one-pot reaction systems for carbon-carbon bond formations, and biomass conversion including synthesis of furfurals from sugars, biodiesel production, and glycerol utilization.

show abstract

“…The ceramic support has highest acidity among the three catalysts samples. However, the acidity of the synthesis catalysts which deposited on glass, ceramic and aluminum supports were lower than the powder form of sugar catalyst which has 2.5 mmol.g -1 total acidity and 1.2 mmol.g -1 -SO3H density [4,6]. The low acidity of synthesis catalysts may be due to small amount of the carbon attached on the supports during the pyrolysis process as the acidity of the catalyst depends on the amount of surface functional groups (-COOH, -SO3H and phenolic -OH group).…”

Section: Total Aciditymentioning

confidence: 93%

“…Besides, the bending mode of -OH……O= linked by a strong hydrogen bond, enables the catalyst to incorporate a large amount of hydrophilic molecules, including water into the vacancies among the domains of catalyst. It enhances their accessibility to Brönsted acid sites in the carbon material, resulting higher catalytic activity than other solid acid catalysts [4,6]. However, due to the fine powder form of sugar catalyst, which is non-porous and has low specific surface area (<1 m 2 g -1 ) causes agglomeration and difficulty of filtration for slurry phase operation.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Sugar Based Catalyst on Various Supports

Janaun¹,

Mey²,

Bono³

et al. 2016

Bull. Chem. React. Eng. Catal.

View full text Add to dashboard Cite

A novel structured carbon-based acid catalyst was prepared by depositing the carbon precursor onto glass, ceramic and aluminum supports via dip-coating method, followed by carbonization process for converting the d-glucose layer into black carbon char in an inert nitrogen environment at 400 °C. Then, the -SO3H group was introduced into the framework of the carbon char by multiple vapor phase sulfonation. Four different carbonization methods were carried out (dry pyrolysis and hydrothermal carbonization with or without pressurized) in the catalyst preparation while among the carbonization methods, the samples which prepared from dry pyrolysis without pressurized process showed the strong acidity due to highest adsorption of acid group in the catalyst surface although the catalyst attached onto the support was the least compared to other preparation methods. Among the catalysts, the sulfonated carbon-base catalyst that is attached on the ceramic support exhibited the highest acidity (1.327 mmol/g) followed by the catalyst deposited on the glass (0.917 mmol/g) and aluminum (0.321 mmol/g) supports. The porous structure of ceramic surface, allowed a better interaction between reactants and -SO3H site in the carbon. Through the FT-IR analysis, it was observed that the functional groups -COOH, -OH, and -SO3H were present in the active sites of the catalysts. The surface areas of glass (Si-SC), ceramic (Ce-SC) and aluminum (Al-SC) catalysts were larger than 1 m 2 /g, whereas the pore size belongs to macroporous as the average pore size is more than 50 nm. It is also stable within the temperature of 400 °C as there was less than 10% weight loss revealed from the TGA analysis.

show abstract

SO3H-bearing mesoporous carbon with highly selective catalysis

Cited by 81 publications

References 42 publications

Polyacrylonitrile fiber mat supported solid acid catalyst for acetalization

Polyacrylonitrile fiber mat supported solid acid catalyst for acetalization

Mechanistic Studies of Solid Acids and Base‐Catalyzed Clean Technologies

Preparation and Characterization of Sugar Based Catalyst on Various Supports

Contact Info

Product

Resources

About