Production of activated carbon materials from kenaf biomass to be used as catalyst support in aqueous-phase reforming process

The preparation of activated carbon materials is discussed along selected examples of precursor materials, of available production and modification methods and possible characterization techniques. We evaluate the preparation methods for activated carbon materials with respect to its use as catalyst support and identify important parameters for metal loading. The considered carbon sources include coal, wood, agricultural wastes or biomass as well as ionic liquids, deep eutectic solvents or precursor solutions. The preparation of the activated carbon usually involves pre-treatment steps followed by physical or chemical activation and application dependent modification. In addition, highly porous materials can also be produced by salt templating or ultrasonic spray pyrolysis as well as by microwave irradiation. The resulting activated carbon materials are characterized by a variety of techniques such as SEM, FTIR, nitrogen adsorption, Boehm titrations, adsorption of phenol, methylene blue and iodine, TPD, CHNS/O elemental analysis, EDX, XPS, XRD and TGA.

Download Full-text

Activated Carbon, Carbon Nanofibers and Carbon-Covered Alumina as Support for W2C in Stearic Acid Hydrodeoxygenation

ChemEngineering ◽

10.3390/chemengineering3010024 ◽

2019 ◽

Vol 3 (1) ◽

pp. 24

Author(s):

Luana Souza Macedo ◽

Victor Teixeira da Silva ◽

Johannes Bitter

Keyword(s):

Activated Carbon ◽

Stearic Acid ◽

Carbon Nanofibers ◽

Carbon Materials ◽

Catalyst Support ◽

Carbon Support ◽

Product Distribution ◽

Mesopore Volume ◽

Catalytic Activities ◽

Carbon Covered Alumina

Carbon materials play a crucial role in sorbents and heterogeneous catalysis and are widely used as catalyst support for several reactions. This paper reports on an investigation of tungsten carbide (W2C) catalyst on three types of carbon support, namely activated carbon (AC), carbon nanofibers (CNF) and carbon-covered alumina (CCA). We evaluated their activity and selectivity in stearic acid hydrodeoxygenation at 350 °C and 30 bar H2. Although all three W2C catalysts displayed similar intrinsic catalytic activities, the support did influence product distribution. At low conversions (<5%), W2C/AC yielded the highest amount of oxygenates relative to W2C/CNF and W2C/CCA. This suggests that the conversion of oxygenates into hydrocarbons is more difficult over W2C/AC than over W2C/CNF and W2C/CCA, which we relate to the lower acidity and smaller pore size of W2C/AC. The support also had an influence on the C18-unsaturated/C18-saturated ratio. At conversions below 30%, W2C/CNF presented the highest C18-unsaturated/C18-saturated ratio in product distribution, which we attribute to the higher mesopore volume of CNF. However, at higher conversions (>50%), W2C/CCA presented the highest C18-unsaturated/C18-saturated ratio in product distribution, which appears to be linked to W2C/CCA having the highest ratio of acid/metallic sites.

Download Full-text

Evaluation of various carbon materials supported Pt catalyts for aqueous-phase reforming of lignocellulosic biomass hydrolysate

International Journal of Hydrogen Energy ◽

10.1016/j.ijhydene.2014.04.180 ◽

2014 ◽

Vol 39 (19) ◽

pp. 10135-10140 ◽

Cited By ~ 12

Author(s):

Burçak Kaya ◽

Sibel Irmak ◽

Arif Hasanoglu ◽

Oktay Erbatur

Keyword(s):

Lignocellulosic Biomass ◽

Aqueous Phase ◽

Carbon Materials ◽

Aqueous Phase Reforming ◽

Biomass Hydrolysate

Download Full-text

A synthesis of porous activated carbon materials derived from vitamin B9 base for CO2 capture and conversion

Materials Today Chemistry ◽

10.1016/j.mtchem.2021.100468 ◽

2021 ◽

Vol 20 ◽

pp. 100468

Author(s):

X. Wang ◽

W. Hui ◽

A. Hu ◽

X. Li ◽

Y. Li ◽

...

Keyword(s):

Activated Carbon ◽

Co2 Capture ◽

Carbon Materials ◽

Vitamin B9 ◽

Porous Activated Carbon

Download Full-text

Control of hydrogen release during borohydride electrooxidation with porous carbon materials

RSC Advances ◽

10.1039/d1ra01444g ◽

2021 ◽

Vol 11 (26) ◽

pp. 15639-15655

Author(s):

Małgorzata Graś ◽

Grzegorz Lota

Keyword(s):

Porous Carbon ◽

Carbon Materials ◽

Catalyst Support ◽

Hydrogen Release ◽

Technological Application ◽

Porous Carbon Materials ◽

Borohydride Electrooxidation

The borohydride electrooxidation process is complex. Technological application of carbon materials is manifested not only in their use as a catalyst support, but also as a physical trap for hydrogen generated during the parasitic hydrolysis.

Download Full-text