Hydrogen production by methane decomposition using bimetallic Ni–Fe catalysts

Ecofriendly and Facile One‐Pot Multicomponent Synthesis of 5‐Phenyl‐5,10‐dihydropyrido[2,3‐d : 6,5‐d′]dipyrimidine‐2,4,6,8(1H,3H,7H,9H)‐tetraone Derivatives Catalyzed by CuII Immobilized on Functionalized Magnetic Mesoporous MCM‐41 (Fe3O4@MCM‐41‐GPTMS‐Gu‐CuII)

“…It is observed that both the surface area and total porevolume decreased in Fe 3 O 4 @MCM‐41‐GPTMS‐Gu‐Cu II ( V ) nanocatalyst, compared to Fe 3 O 4 @MCM‐41 ( II ), which may be explained as a result of the occupation of some pores by anchored organic segments, which took place during the functionalization process and also immobilization of Cu II [45b&c] . It is noteworthy that increasing mean pore, compared to Fe 3 O 4 @MCM‐41 ( II ), is probably corresponding to the presence of Cu II , which causes the creation of new pores in the structure of Fe 3 O 4 @MCM‐41‐GPTMS‐Gu‐Cu II ( V ) [46] …”

“…[45b&c] It is noteworthy that increasing mean pore, compared to Fe 3 O 4 @MCM-41 (II), is probably corresponding to the presence of Cu II , which causes the creation of new pores in the structure of Fe 3 O 4 @MCM-41-GPTMS-Gu-Cu II (V). [46] The morphology of Fe 3 O 4 @MCM-41 (II) and Fe 3 O 4 @MCM-41-GPTMS-Gu-Cu II (V) nanocatalyst was also explored by scanning electron microscopy (SEM) technique ( Figure 5). As clearly shown in Figure 5a, Fe 3 O 4 @MCM-41 (II) and Fe 3 O 4 @MCM-41- These results demonstrate that there was no significant change in surface morphology of Fe 3 O 4 @MCM-41 (II) after functionalization processes, verifying chemical stability.…”

Methane Pyrolysis for CO2‐Free H2 Production: A Green Process to Overcome Renewable Energies Unsteadiness

“…It is generally accepted that high GHSVs lead to lower methane conversions [61,65,66,97,108,110,121,147]. This is attributed to the shorter residence time, lower contact efficiency between the gas and the catalyst, and lower amount of methane adsorbed on the active sites when the GHSV is increased [61,65,66,105,108,110,[147][148][149]. In addition to this, high GHSVs cause a faster catalyst deactivation [97,108,147].…”

Pyrolysis of Methane and Ethane in a Compression–Expansion Process as a New Concept for Chemical Energy Storage: A Kinetic and Exergetic Investigation

“…The needed catalysts for this reaction as well as the temperature range has been studied many times. [21][22][23][24] In early studies, Muradov [21,25] found out, that metal or metal oxide catalysts are very advantageous, yielding hydrogen purities in hydrogen-methane mixtures of >80% at temperatures above 1100 K, which is very close to the chemical equilibrium. The additionally produced solid carbon is used industrially or can be buried in the ground.…”