High temperature iron-based catalysts for hydrogen and nanostructured carbon production by methane decomposition

Hydrogen and multiwall carbon nanotubes production by catalytic decomposition of methane: Thermogravimetric analysis and scaling-up of Fe–Mo catalysts

“…Fresh catalysts were synthesized by the fusion method from mixture of the respective salts and subsequent calcination in air at 450 °C during 2 hours [17]. The molar ratio of the components (2:1) was selected according to prior work conducted by our research group [15]. Catalysts were doped with Mo in different loadings: 2.5, 5, 7.…”

“…However, Ni and Co-based catalysts suffered from rapid deactivation when used at temperatures higher than ca. 650 ºC due to metal particle encapsulation by carbon [12][13][14][15][16]. Fe-based catalysts can operate at higher temperatures than Co or Ni based catalysts without suffering from deactivation, resulting in higher methane conversions due to the positive shift of the thermodynamic equilibrium.…”

“…Our group has recently synthesized high loaded iron oxide based catalysts with Al 2 O 3 and MgO as textural promoters (Fe/MgO and Fe/Al 2 O 3 ) [14,15,17,18]. These catalysts showed methane conversion values close to equilibrium along with the production of MWCNTs and bamboo CNTs (also named as chain-like type [19]).…”

Preparation of polymer composites using nanostructured carbon produced at large scale by catalytic decomposition of methane

“…The other two catalysts were iron over alumina (denoted as Fe:Al 2 O 3 ) and iron doped with molybdenum and magnesia (denoted as Fe:Mo:MgO). The catalysts were prepared by the fusion method, which was described elsewhere [25]. To summarise, the respective nitric salts of the metals were mixed to form a powder that was subsequently heated at The CDM experiments were conducted in a rotary reactor installation that consists of a cylindrical drum made of Kanthal rotating around its horizontal axis.…”

Preparation of Modified Red Mud-Supported Fe Catalysts for Hydrogen Production by Catalytic Methane Decomposition

“…Many works have been reported on CMD using metal catalysts, such as Fe [12][13][14][15], Co [16,17], Ni [18][19][20][21], carbon materials [22][23][24][25][26][27], 2 Journal of Nanomaterials three red mud samples for hydrogen production by CMD. The highest methane conversion obtained in their study was 19.8% with a corresponding methane conversion rate of 18.0 × 10 −6 mol CH 4 /g cat /s, which is associated with a sample containing the highest proportion of iron, and two other samples exhibited poorer activity than this sample did.…”