Investigation of nickel-impregnated zeolite catalysts for hydrogen/syngas production from the catalytic reforming of waste polyethylene

Coke formation and deactivation during catalytic reforming of biomass and waste pyrolysis products: A review

“…Another system consists on the anchoring of metal particles (mostly Fe, Co and Ni) inside and/or outside well-defined channels of nanotubes ( Figure 3d-f), among which CNTs are the most commonly employed [80][81][82]. Metal crystallites have also been embedded inside highly porous structures, such as zeolites, thus limiting the space for carbon growth [83], but zeolite requires its acidity to be lowered (for instance, by means of dealumination) for submitting it to reforming [84]. Compared to the other encapsulating methods in Figure 3, this method allows tuning the thick of the support layer by sequential molecular or atomic layers, which allows the confinement of metal particles with an acceptable support porosity [89][90][91][92].…”

Hydrogen and Carbon Nanotubes from Pyrolysis-Catalysis of Waste Plastics: A Review

“…A two-stage fixed bed batch reactor system incorporating, pyrolysis followed by catalytic steam reforming for the production of hydrogen has been used in several studies to investigate the influence of various catalyst types and many process parameters ( Fig. 1) [32][33][34][35][36][37]. The two stages process batch samples of the waste plastics and the catalytic reactor contains a batch of catalyst in a fixed bed.…”

Preparation of Iron‐ and Nitrogen‐Codoped Carbon Nanotubes from Waste Plastics Pyrolysis for the Oxygen Reduction Reaction

“…A recent estimate has shown that the total quantity of plastic waste generated around the world from when plastic manufacturing began up to the year 2015 was about 6.3 billion tons, with about 60 % of it being thrown away, which is a great waste of resources and a cause of pollution . Therefore, the effective transformation and utilization of plastic waste has attracted significant attention . Catalytic pyrolysis is considered to be a possible solution to promote the recycling of plastic waste by converting plastic into carbon nanotubes (CNT), oil, and high heating value gases .…”

“…[2] Therefore, the effective transformation and utilization of plastic waste hasa ttracted significant attention. [3] Catalyticp yrolysis is considered to be ap ossible solutiont op romote the recycling of plastic waste by converting plastic into carbon nanotubes (CNT), [4] oil, [5] and high heating value gases. [6] In particular,c arbon nanotubes have attracted increasing attention, owing to their excellent physicala nd chemical properties.…”