Activity and stability of NiCe@SiO multi–yolk–shell nanotube catalyst for tri-reforming of methane

Review on the catalytic tri-reforming of methane - Part I: Impact of operating conditions, catalyst deactivation and regeneration

“…In the investigation of metal-support interaction of Ni-based catalysts for TRM (reaction conditions: tubular reactor, at 800 • C, 1 bar, GHSV = 17,220 mL h − 1 g − 1 , molar ratio of CH 4 :CO 2 :H 2 O:O 2 : N 2 = 1:0.23:0.46:0.07:0.28, TOS = 10 h), Kumar et al [51,52] reported that the Ni/SBA-15 possessed excellent resistance towards carbon deposition and great confinement governing the TRM performance with time-on-stream but re-oxidation of partial metallic Ni to NiO was unavoidable, as evidenced by XRD analyses. Such observation is in accordance with the findings of Kim et al in their study of TRM over NiCe@SiO 2 catalysts [77]. The TRM reaction was carried out in a fixed bed reactor at atmospheric pressure, using 75 mg catalyst, GHSV of 60, 000 mL g − 1 h − 1 at different O/M feed molar ratios, TOS of 20 h. They assigned the deactivation of NiCe@SiO 2 to re-oxidation of the metallic Ni form deteriorating the multi-yolk-shell nanotube configuration under high feed ratio of oxidizing agents.…”

Review on the catalytic tri-reforming of methane - Part II: Catalyst development

“…However, this approach is seldom the one subsequently applied to TRM. Kim et al [48] synthesized a multi-yolk-shell nanotube structured NiCe@SiO 2 catalyst via a reverse microemulsion method. The Ni-Ce-yolk of the prepared catalyst was confined inside a SiO 2 shell, leading to a remarkable metal-support interaction.…”

“…Furthermore, yolks larger than 30 nm exhibited stable activity at high oxidizer-methane feed ratio. Overall, the major advantage of the microemulsion method over conventional synthesis approaches is the convenient control of catalyst morphology and appropriate MSI [48].…”

An Overview of Economic Analysis and Environmental Impacts of Natural Gas Conversion Technologies

“…These methods include methane reforming using steam, carbon dioxide, and oxygen. Recently, research focus is shifting to the advanced form of reforming such as tri-reforming of methane, chemical looping reforming, and photocatalytic reforming [23][24][25][26][27][28]. Amongst the thermochemical processes, the steam methane reforming is the most established and presently being employed for a large proportion of global hydrogen production [17,29,30].…”