Chemical vapor infiltration of activated carbon with tetramethylsilane

Pflitsch, Christian; Curdts, Benjamin; Helmich, Martin; Pasel, Christoph; Notthoff, Christian; Bathen, Dieter; Atakan, Burak

doi:10.1016/j.carbon.2014.07.018

Cited by 4 publications

(5 citation statements)

References 11 publications

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“…At a coating temperature of 973.15 K, a coating with silicon dioxide (SiO2), while at 1098.15 K, a coating with silicon carbide (SiC) was proved [28,29], both after contact with air.…”

Section: Resultsmentioning

confidence: 99%

“…Presumably there is both, film growth and particle agglomeration. A more detailed discussion of surface morphology of uncoated and coated materials can be found in Pflitsch et al [28]. In addition, this publication contains a detailed energy dispersive X-ray spectroscopy (EDX) study to investigate the composition of coated and uncoated materials.…”

Section: Resultsmentioning

confidence: 99%

“…After the infiltration experiments, the samples were taken out of the furnace and cooled down in an inert gas atmosphere. They were subsequently analyzed after getting into contact with the laboratory atmosphere, as detailed described elsewhere [28][29][30].…”

Section: Coatingmentioning

confidence: 99%

“…The advantages of TMS are a simple handling, moderate costs, and high availability. It was shown that it is possible to modify the properties of activated carbon by SiC coating without significantly altering the adsorption capacity [28]. Furthermore, the high temperatures resistance in an oxygen atmosphere is increased when compared to uncoated activated carbon [29].…”

Section: Introductionmentioning

confidence: 99%

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Investigation of Mechanical, Chemical and Adsorptive Properties of Novel Silicon-Based Adsorbents with Activated Carbon Structure

Bläker

Heib

Pasel

et al. 2017

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Abstract:In this article, for the first time the chemical and mechanical properties of novel adsorbents based on the coating of activated carbons with silicon carbide are reported. The adsorbents are prepared by chemical vapor infiltration (CVI) of activated carbons with tetramethylsilane (TMS) as a precursor. A comparison of two different modified types of activated carbon, C40/4 Extra and A35/4 Extra, each infiltrated with 25%-mass at infiltration temperatures of 973.15 and 1098.15 K, respectively, is presented. Adsorption properties were characterized by measuring nitrogen isotherms and volatile organic compounds (VOC) isotherms in gas phase and excess isotherms in liquid phase. In addition, the physico-chemical properties including the bulk density, ash content, particle hardness, abrasion, conductivity, water-soluble components, and pH value were determined. Furthermore, the first experiments in a fluidized bed adsorber are presented. The results show that the adsorption properties of the modified adsorbents are mainly maintained. The particle hardness and the abrasion resistance increases with increasing infiltration temperature, which leads to an overall increasing of mechanical stability. A modification of the chemical stability as a result of the infiltration experiments is not observed.

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“…At a coating temperature of 973.15 K, a coating with silicon dioxide (SiO2), while at 1098.15 K, a coating with silicon carbide (SiC) was proved [28,29], both after contact with air.…”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Coatingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Investigation of Mechanical, Chemical and Adsorptive Properties of Novel Silicon-Based Adsorbents with Activated Carbon Structure

Bläker

Heib

Pasel

et al. 2017

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“…A number of works on rapid densification processes have been undertaken recently on CVI processes. − The performance of C/C composites is superior as compared to other high-temperature materials; they exhibit excellent mechanical and physical properties such as increased ablation resistance and mechanical strength and lower density …”

Section: C/c Ablative Compositesmentioning

confidence: 99%

Advances in Ablative Composites of Carbon Based Materials: A Review

Kumar

Kandasubramanian

2019

Ind. Eng. Chem. Res.

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Ablative composites are highly endothermic sacrificial thermal protection materials that are indispensable to the aerospace industry. Polymeric ablatives are the most versatile and the largest class of thermal protection materials due to their capability to be to varied hyperthermal environments. Carbon/carbon composites have outstanding mechanical properties at higher temperatures but they are susceptible to oxidation. The oxidation is addressed by matrix modification, application of a coat of ultrahigh temperature ceramics (UHTC), or also by the use of nanostructure-toughened UHTC coatings as discussed in this article. The article presents a comprehensive review of the science and technology of four distinct groups of ablative composites (carbon/carbon, carbon/phenolic, carbon/elastomeric and carbon/ceramic). The selection of the best material formulations for a given environment is ratified by the testing techniques, which have also been reviewed along with a brief discussion on the composites recycling technologies and their environmental and economic impacts.

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