Carbon covered alumina prepared by the pyrolysis of sucrose: A promising support material for the supported Pt–Sn bimetallic dehydrogenation catalysts

Employing Exfoliated Graphite as Novel Support Material for Heterogeneous Model Catalysts

10.26434/chemrxiv.8079620 ◽

2019 ◽

Author(s):

Moritz Wolf ◽

Nico Fischer ◽

Michael Claeys

Keyword(s):

Surface Area ◽

Graphite Powder ◽

Model Catalysts ◽

Model Systems ◽

Exfoliated Graphite ◽

Support Material ◽

Heterogeneous Model ◽

Support Materials ◽

Metal Support Interaction ◽

Catalyst Systems

The inert nature of graphitic samples allows for characterisation of rather isolated supported nanoparticles in model catalysts, as long as sufficiently large inter-particle distances are obtained. However, the low surface area of graphite and the little interaction with nanoparticles result in a challenging application of conventional preparation routes in practice. In the present study, a set of graphitic carbon materials was characterised in order to identify potential support materials for the preparation of model catalyst systems. Various sizes of well-defined Co3O4 nanoparticles were synthesised separately and supported onto exfoliated graphite powder, that is graphite after solvent-assisted exfoliation via ultrasonication resulting in thinner flakes with increased specific surface area. The developed model catalysts are ideally suited for sintering studies of isolated nano-sized cobaltous particles as the graphitic support material does not provide distinct metal-support interaction. Furthermore, the differently sized cobaltous particles in the various model systems render possible studies on structural dependencies of activity, selectivity, and deactivation in cobalt oxide or cobalt catalysed reactions.

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PEMBENIHAN DAN AKLIMATISASI PADA SISTEM ANAEROBIK

Jurnal Rekayasa Lingkungan ◽

10.29122/jrl.v6i2.1927 ◽

2018 ◽

Vol 6 (2) ◽

Author(s):

Indriyati Indriyati

Keyword(s):

Growth Rate ◽

Total Population ◽

Fixed Bed ◽

Support Material ◽

Anaerobic Process ◽

Anaerobic Reactor

Seeding in Fixed Bed anaerobic reactor are infl uenced by several condition such as the growth rate total population of microbial, bacterial adaption to infl uent and the retention ofÂ biomass in reactor. The aim of this observation is to fi nd out the seeding and acclimation process in anaerobic process by using plastic as support material. Seeding and acclimatization process run smoothly can be seen from the increasing of infl uent or substrate and following by the increasing degradation of soluble COD, beside that the decreasing of VSS concentration indicates that microorganism are all ready fi x in support material, therefore reactor can be operated continuously and the acclimatization process can be stopped.Keywords : anaerobic seeding, acclimation anaerobic process

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MICROBIAL CELLULOSE AS SUPPORT MATERIAL FOR THE IMMOBILIZATION OF DENITRIFYING BACTERIA

Environmental Engineering and Management Journal ◽

10.30638/eemj.2008.082 ◽

2008 ◽

Vol 7 (5) ◽

pp. 589-594 ◽

Cited By ~ 34

Author(s):

Abbas Rezaee ◽

Hatam Godini ◽

Hossein Bakhtou

Keyword(s):

Denitrifying Bacteria ◽

Support Material ◽

Microbial Cellulose

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Influence of Seeding Conditions on Initial Biofilm Development during the Startup of Anaerobic Fluidized Bed Reactors

Water Science & Technology ◽

10.2166/wst.1989.0219 ◽

1989 ◽

Vol 21 (4-5) ◽

pp. 157-165 ◽

Cited By ~ 2

Author(s):

F. Ehlinger ◽

J. M. Audic ◽

G. M. Faup

Keyword(s):

Fluidized Bed ◽

Future Development ◽

Protein Concentration ◽

Specific Activity ◽

Fluidized Bed Reactor ◽

Fluidized Bed Reactors ◽

Support Material ◽

Biofilm Development ◽

Initial Biofilm

The characterization of the biofilm of an anaerobic fluidized-bed reactor was completed under standard conditions. The distribution of the fixed protein concentration depended on the level in the reactor. The protein concentration reached 1520 µg.g−1 of support at the top of the reactor and only 1200 µg.g−1 at the bottom after 504 hours of operation but the specific activity of the biofilm was 33×10−4 µM acetate.h−1.mg−1 proteins at the bottom and only 26×10−4 µM.h−1.mg−1 at the top. The efficiency of a fluidized bed reactor and the composition of the biofilm changed with an increase of the pH from 7 to 8.5 during the seeding of the support material. Future development of the biofilm and the specific activity of the support were affected.

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