Toluene steam reforming using nickel based catalysts made from mining residues

Belbessai, Salma; Achouri, Inès Esma; Benyoussef, El-Hadi; Gitzhofer, F.; Abatzoglou, Nicolas

doi:10.1016/j.cattod.2020.07.087

Cited by 13 publications

(9 citation statements)

References 36 publications

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“… 49 The presence of Mg in the catalyst enhanced the adsorption of steam due to its hydrophilicity, which would lead to a better performance of steam reforming. 50 After the reaction, the atomic percentage of O was decreased while that of Ni was increased, which also confirmed the reduction of NiO by the plasma active species. The enhanced atomic percentage of C on the spent Ni catalyst suggests the carbon-containing species were deposited on the catalyst surface.…”

Section: Results and Discussionsupporting

confidence: 55%

Plasma-Catalytic Reforming of Naphthalene and Toluene as Biomass Tar over Honeycomb Catalysts in a Gliding Arc Reactor

Mei

Liu

Yanık

et al. 2022

ACS Sustainable Chem. Eng.

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Biomass gasification is a promising and sustainable process to produce renewable and CO 2 -neutral syngas (H 2 and CO). However, the contamination of syngas with tar is one of the major challenges to limit the deployment of biomass gasification on a commercial scale. Here, we propose a hybrid plasma-catalytic system for steam reforming of tar compounds over honeycomb-based catalysts in a gliding arc discharge (GAD) reactor. The reaction performances were evaluated using the blank substrate and coated catalytic materials (γ-Al 2 O 3 and Ni/γ-Al 2 O 3 ). Compared with the plasma alone process, introducing the honeycomb materials in GAD prolonged the residence time of reactant molecules for collision with plasma reactive species to promote their conversions. The presence of Ni/γ-Al 2 O 3 gave the best performance with the high conversion of toluene (86.3%) and naphthalene (75.5%) and yield of H 2 (35.0%) and CO (49.1%), while greatly inhibiting the formation of byproducts. The corresponding highest overall energy efficiency of 50.9 g/kWh was achieved, which was 35.4% higher than that in the plasma alone process. Characterization of the used catalyst and long-term running indicated that the honeycomb material coated with Ni/γ-Al 2 O 3 had strong carbon resistance and excellent stability. The superior catalytic performance of Ni/γ-Al 2 O 3 can be mainly ascribed to the large specific surface area and the in situ reduction of nickel oxide species in the reaction process, which promoted the interaction between plasma reactive species and catalysts and generated the plasma-catalysis synergy.

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Section: Results and Discussionsupporting

confidence: 55%

Plasma-Catalytic Reforming of Naphthalene and Toluene as Biomass Tar over Honeycomb Catalysts in a Gliding Arc Reactor

Mei

Liu

Yanık

et al. 2022

ACS Sustainable Chem. Eng.

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show abstract

“…CH 4 is mainly formed from dealkylation of the methyl group in the toluene structure and, to a minor extent, from the methanation of CO [8]. However, steam reforming of CH 4 prevails over these reactions, since the content of CH 4 in the products is very low [12]. The presence of an undesired compound (benzene) is due to incomplete decomposition of toluene [70], which is confirmed in Fig.…”

Section: Role Of Temperature In the Tar Conversion On Olivine Catalystmentioning

confidence: 53%

“…Tar model compounds have been widely used in order to ascertain the catalyst performance and determine suitable operating conditions. In this work, toluene was selected as a tar model compound because it is a stable aromatic structure, especially at relatively low temperatures, apart from being one of the major tar species in the biomass gasification [10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

“…A wide range of materials with significant activity for cracking and reforming of heavy aromatic compounds have been investigated as primary catalysts [12,14]. Natural minerals, such as olivine and calcined dolomite, have been widely used in the steam gasification in fluidized beds, as they are active for tar removal, apart from being inexpensive and abundant [23].…”

Section: Introductionmentioning

confidence: 99%

“…From a catalytic point of view, nickel is known to be the most interesting metal phase for reforming applications [30]. Ni-based catalysts have been widely applied in the steam reforming of biomass tars due to both their high activity for breaking C-C and O-H bonds and performance in terms of H 2 production [7,12,13,[31][32][33][34][35]. However, their main drawbacks are related to their rapid deactivation, mechanical fragility and high cost compared to natural minerals or alumina [36].…”

Section: Introductionmentioning

confidence: 99%

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