Combined steam and dry reforming of methane for syngas production from biogas using bimodal pore catalysts

Dan, Monica; Miheţ, Maria; Borodi, Gheorghe; Lazăr, Mihaela D.

doi:10.1016/j.cattod.2020.09.014

Cited by 38 publications

(20 citation statements)

References 31 publications

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“…According to other published works, the addition of H 2 O to the feed of DRM inhibits carbon formation (more stability), which is favored in the dry reforming operating conditions, and might produce syngas with desired compositions (H 2 /CO ratio) [ 23 , 48 ]. Figure 11 compares CH 4 and CO 2 conversions and H 2 and CO yields in the low-temperature DRM with and without co-feeding H 2 O (2 vol.%) in the CR.…”

Section: Resultsmentioning

confidence: 99%

Preparation, Characterization, and Activity of Pd/PSS-Modified Membranes in the Low Temperature Dry Reforming of Methane with and without Addition of Extra Steam

et al. 2021

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The external surface of a commercial porous stainless steel (PSS) was modified by either oxidation in air at varying temperatures (600, 700, and 800 °C) or coating with different oxides (SiO2, Al2O3, and ZrO2). Among them, PSS-ZrO2 appears as the most suitable carrier for the synthesis of the Pd membrane. A composite Pd membrane supported on the PSS-ZrO2 substrate was prepared by the electroless plating deposition method. Supported Ru catalysts were first evaluated for the low-temperature methane dry reforming (DRM) reaction in a continuous flow reactor (CR). Ru/ZrO2-La2O3 catalyst was found to be active and stable, so it was used in a membrane reactor (MR), which enhances the methane conversions above the equilibrium values. The influence of adding H2O to the feed of DRM was investigated over a Ru/ZrO2-La2O3 catalyst in the MR. Activity results are compared with those measured in a CR. The addition of H2O into the feed favors other reactions such as Water-Gas Shift (RWGS) and Steam Reforming (SR), which occur together with DRM, resulting in a dramatic decrease of CO2 conversion and CO production, but a marked increase of H2 yield.

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Section: Resultsmentioning

confidence: 99%

Preparation, Characterization, and Activity of Pd/PSS-Modified Membranes in the Low Temperature Dry Reforming of Methane with and without Addition of Extra Steam

et al. 2021

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“…Ni/Al 2 O 3 catalysts showed good performances in terms of CH 4 conversion (98% when H 2 O/CH 4 is 6.1), also at 600 • C cofeeding a large amount of water; CO 2 in these conditions showed very low conversion (23% when H 2 O/CH 4 = 1.2) [74]. Other authors investigated alumina as support in steam and dry reforming of biogas finding high methane and CO 2 conversions and syngas produced with interesting H 2 /CO values with temperatures ranging from 600 to 900 • C [66,73,[75][76][77][78][79][80][81][82][83]. It has been demonstrated that 5 wt.% Ni supported on microporous alumina is more active and resistant compared to the 5 wt.% Ni supported over nonporous alumina.…”

Section: Monometallic Ni-based Catalystsmentioning

confidence: 96%

“…A more efficient synthesis allowing the formation of highly dispersed and reducible Ni particles that increase the activity of samples [73]. It is noteworthy that the reoxidation of Ni 0 may take place in steam reforming conditions, while a strong deactivation caused by a massive coke formation is observed during dry reforming (Figure 4) [70,[74][75][76]83].…”

Section: Monometallic Ni-based Catalystsmentioning

confidence: 99%

“…Catalysts 2022, 12, x FOR PEER REVIEW 6 of 29 [73]. It is noteworthy that the reoxidation of Ni 0 may take place in steam reforming conditions, while a strong deactivation caused by a massive coke formation is observed during dry reforming (Figure 4) [70,[74][75][76]83]. The addition of Mg to the catalytic formulation leads to the formation of mixed splinel phases and basic sites that have been proven to improve the CO2 conversion and the overall stability [75,76,83].…”

Section: Monometallic Ni-based Catalystsmentioning

confidence: 99%

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Catalytic Upgrading of Clean Biogas to Synthesis Gas

et al. 2022

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Clean biogas, produced by anaerobic digestion of biomasses or organic wastes, is one of the most promising substitutes for natural gas. After its purification, it can be valorized through different reforming processes that convert CH4 and CO2 into synthesis gas (a mixture of CO and H2). However, these processes have many issues related to the harsh conditions of reaction used, the high carbon formation rate and the remarkable endothermicity of the reforming reactions. In this context, the use of the appropriate catalyst is of paramount importance to avoid deactivation, to deal with heat issues and mild reaction conditions and to attain an exploitable syngas composition. The development of a catalyst with high activity and stability can be achieved using different active phases, catalytic supports, promoters, preparation methods and catalyst configurations. In this paper, a review of the recent findings in biogas reforming is presented. The different elements that compose the catalytic system are systematically reviewed with particular attention on the new findings that allow to obtain catalysts with high activity, stability, and resistance towards carbon formation.

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“…The combined steam/dry reforming process is also possible via use of the established industrial technologies, avoiding huge investments. Different classes of catalysts have been investigated for this reaction, but Ni-based materials are still the most used in industrial applications, due to the good compromise between the activity and price [33][34][35][36][37][38]. Noble and transition metals have been investigated for reforming reactions, but the high activity and the resistance to the deactivation of noble metals does not justify their application on a large scale, due to the production costs [39][40][41][42].…”

Section: Introductionmentioning

confidence: 99%

Combined Reforming of Clean Biogas over Nanosized Ni–Rh Bimetallic Clusters

et al. 2020

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The combined steam/dry reforming of clean biogas (CH4/CO2 = 50/50 v/v) represents an innovative way to produce synthesis gas (CO + H2) using renewable feeds, avoiding to deplete the fossil resources and increase CO2 pollution. The reaction was carried out to optimize the reaction conditions for the production of a syngas with a H2/CO ratio suitable for the production of methanol or fuels without any further upgrading. Ni-Rh/Mg/Al/O catalysts obtained from hydrotalcite-type precursors showed high performances in terms of clean biogas conversion due to the formation of very active and resistant Ni-Rh bimetallic nanoparticles. Through the utilization of a {Ni10Rh(CO)19}{(CH3CH2)4N}3 cluster as a precursor of the active particles, it was possible to promote the Ni-Rh interaction and thus obtain low metal loading catalysts composed by highly dispersed bimetallic nanoparticles supported on the MgO, MgAl2O4 matrix. The optimization of the catalytic formulation improved the size and the distribution of the active sites, leading to a better catalyst activity and stability, with low carbon deposition with time-on-stream.

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Combined steam and dry reforming of methane for syngas production from biogas using bimodal pore catalysts

Cited by 38 publications

References 31 publications

Preparation, Characterization, and Activity of Pd/PSS-Modified Membranes in the Low Temperature Dry Reforming of Methane with and without Addition of Extra Steam

Preparation, Characterization, and Activity of Pd/PSS-Modified Membranes in the Low Temperature Dry Reforming of Methane with and without Addition of Extra Steam

Catalytic Upgrading of Clean Biogas to Synthesis Gas

Combined Reforming of Clean Biogas over Nanosized Ni–Rh Bimetallic Clusters

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