Syngas production from reforming of methane with CO2 and O2 over Ni/SrO?SiO2 catalysts in a fluidized bed reactor

Non-Catalytic Reforming of Biogas in Porous Media Combustion

“…The convective heat transfer coefficient (h v ) was taken from [19] as h v ¼ 6ε=d 2 ÀÁ Nu k g , whereas the correlation for Nu was considered as Nu ¼ 2 þ 1:1Re 0:6 Pr 1=3 g as presented by Wakao and Kaguei [31]. A radiant conductivity model taken from [29] was used to include the effect of radiation, where k R ¼ 4FσT 3 s with F being the radiation exchange factor. This has to be modelled for each material since it is dependent upon its thermal conductivity and emissivity.…”

“…Accordingly, research has been focused on improving the syngas production from biogas process efficiency, being the use of fluidized bed reactors a promising real alternative to effectively increase efficiency. However, they have presented a major drawback related to catalytic wearing mainly associated to the elevated temperatures (over 1000 K and up to 1300 K) required for the efficient and cost-effective conversion of biogas into syngas [1][2][3][4].…”

Biogas as a source of renewable syngas production: advances and challenges

“…In the literature, different critical particle sizes have been reported: 7 nm [57] or 10 nm [58] for methane reforming with CO 2 , below which carbon deposition can be avoided. However, the addition of noble metals [59], Co [60], Ag [61], Sr [62] or the sulfur passivation of the nickel catalyst [63] leads to the formation of smaller ensembles, which suppress carbon formation. Several investigations of supported Rh [64], Pt [65] and Ni [66] catalysts have shown that carbon deposition can be largely suppressed when TiO 2 is used as a catalyst support.…”

Syngas Production From the Reforming of Typical Biogas Compositions in an Inert Porous Media Reactor

“…Available methods for biogas reforming consider the use of continuous beds, fluidized beds, supercritical H 2 O, and membrane catalytic reactors (Gao et al, 2018;Remón et al, 2018). However, the major drawbacks of these approaches are associated to the decrease in efficiency as consequence of catalytic wearing caused by the elevated temperatures needed for cost-effective biogas reforming into syngas (Jing et al, 2004;Chen et al, 2005;Hou et al, 2007;Gao et al, 2008). Commercial development has also been limited because of the effects of sintering and coking, widely reported by other researchers to occur over 1,100 K, being both phenomena responsible for the precipitation of solid materials driving to catalytic deactivation (Boullosa-Eiras et al, 2011;Moral et al, 2018).…”