scholarly journals Correction: Syngas production by bi-reforming methane on an Ni–K-promoted catalyst using hydrotalcites and filamentous carbon as a support material

RSC Advances ◽  
2020 ◽  
Vol 10 (41) ◽  
pp. 24492-24492
Author(s):  
Adelino F. Cunha ◽  
Sergio Morales-Torres ◽  
Luisa M. Pastrana-Martínez ◽  
António A. Martins ◽  
Teresa M. Mata ◽  
...  
Keyword(s):  
Support Material ◽  
Syngas Production ◽  
Filamentous Carbon

Correction for ‘Syngas production by bi-reforming methane on an Ni–K-promoted catalyst using hydrotalcites and filamentous carbon as a support material’ by Adelino F. Cunha et al., RSC Adv., 2020, 10, 21158–21173, DOI: 10.1039/D0RA03264F.

scholarly journals Syngas production by bi-reforming methane on an Ni–K-promoted catalyst using hydrotalcites and filamentous carbon as a support material

RSC Advances ◽  
2020 ◽  
Vol 10 (36) ◽  
pp. 21158-21173
Author(s):  
Adelino F. Cunha ◽  
Sergio Morales-Torres ◽  
Luisa M. Pastrana-Martínez ◽  
António A. Martins ◽  
Teresa M. Mata ◽  
...  
Keyword(s):  
High Temperatures ◽  
Support Material ◽  
Support Structure ◽  
Syngas Production ◽  
Filamentous Carbon

A Ni phase dispersed in CO2 is used with a K promoter in the BRM. The LDH support structure collapses at high temperatures, inducing large Ni crystal sizes, and disfavoring activity. The catalyst is compensated by the K promoter, and the formation of an Mg–Al-spinel.

Production of Syngas by Combination of CO2 Reforming and Partial Oxidation of CH4 over Ni/Al2O3 Catalysts in Fixed-bed Reactor

2010 ◽  
Vol 8 (1) ◽  
Author(s):  
Mohammad Zangouei ◽  
Abdolsamad Zarringhalam Moghaddam ◽  
Abdolhosein Razeghi ◽  
Mohammad Reza Omidkhah
Keyword(s):  
Partial Oxidation ◽  
Sol Gel ◽  
Fixed Bed ◽  
Fixed Bed Reactor ◽  
Sem Images ◽  
Co2 Reforming ◽  
Syngas Production ◽  
Oxidation Of Methane ◽  
Filamentous Carbon ◽  
Diffraction Patterns

Ni/Al2O3 catalysts were synthesized by sol-gel method with various nickel loadings. Chemical and physical properties of the catalysts were characterized by XRD and TPR techniques. X-ray diffraction patterns showed no peaks due to NiO species. Temperature-programmed reduction (TPR) indicated that the nickel species mainly presented in NiAl2O4 phase. The effect of nickel loading on the catalytic activity of Ni/Al2O3 catalysts, selectivity of products, yield of hydrogen production and H2/CO ratio was investigated in the combination of dry reforming and partial oxidation of methane (DRPOM) reaction. The results indicated that these parameters are greatly dependent on the amount of nickel loading. The results also revealed that the catalyst with 20 percent nickel loading had the highest activity for syngas production after 270 min reaction on stream. The SEM images of spent catalysts showed the formation of filamentous carbon on the 20Ni/Al and 30Ni/Al catalysts.

Pyrolytic carbon filaments and associated catalytic particles formed in steel tubes

1984 ◽  
Vol 42 ◽  
pp. 662-663
Author(s):  
Y. L. Chen ◽  
J. R. Bradley
Keyword(s):  
Stainless Steel ◽  
Carbon Steel ◽  
Catalyst Particle ◽  
Pyrolytic Carbon ◽  
Plain Carbon Steel ◽  
304 Stainless Steel ◽  
Hydrocarbon Gases ◽  
Steel Tubes ◽  
Filamentous Carbon ◽  
Carbon Filaments

Considerable effort has been directed toward an improved understanding of the production of the strong and stiff ∼ 1-20 μm diameter pyrolytic carbon fibers of the type reported by Koyama and, more recently, by Tibbetts. These macroscopic fibers are produced when pyrolytic carbon filaments (∼ 0.1 μm or less in diameter) are thickened by deposition of carbon during thermal decomposition of hydrocarbon gases. Each such precursor filament normally lengthens in association with an attached catalyst particle. The subject of filamentous carbon formation and much of the work on characterization of the catalyst particles have been reviewed thoroughly by Baker and Harris. However, identification of the catalyst particles remains a problem of continuing interest. The purpose of this work was to characterize the microstructure of the pyrolytic carbon filaments and the catalyst particles formed inside stainless steel and plain carbon steel tubes. For the present study, natural gas (∼; 97 % methane) was passed through type 304 stainless steel and SAE 1020 plain carbon steel tubes at 1240°K.

Employing Exfoliated Graphite as Novel Support Material for Heterogeneous Model Catalysts

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

<p>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 Co<sub>3</sub>O<sub>4</sub> nanoparticles were synthesised separately and supported onto exfoliated graphite powder, that is graphite after solvent-assisted exfoliation <i>via</i> 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.</p>

PEMBENIHAN DAN AKLIMATISASI PADA SISTEM ANAEROBIK

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 of 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

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

1989 ◽  
Vol 21 (4-5) ◽  
pp. 157-165 ◽  
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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