Zeolites on 3D-printed open metal framework structure: metal migration into zeolite promoted catalytic cracking of endothermic fuels for flight vehicles

Abstract

Metal migration from 3D printed metal support into Zeolite film causes unprecedented catalytic cracking of methylcyclohexane

Endothermic catalytic cracking of liquid hydrocarbons for thermal management of high-speed flight vehicles

“…66,67 Recently, our group has studied the deposition of zeolite and binder modified zeolites on 3D printed Inconel supports for the catalytic cracking of methylcyclohexane and found unexpected and promising results in terms of high conversion and product selectivity. 68 The coated catalyst particles were 30 times more active in comparison with the same catalysts in fixed-bed reactor per same weight, and high amounts of hydrogen were produced, leading to a suspected high endothermicity. These results were explained by metal migration from the 3D printed support to the zeolite particles and highlights the potential of additive manufacturing in the field of heat management of high-speed flight vehicles, which will be further discussed in this review.…”

Surface functionalized 3D printed metal structures as next generation recyclable SERS substrates

“…For instance, zeolite Y was deposited on the surface of a LPBF-printed substrate using a novel chemical wash coating method and the substrate showed substantial catalytic activity in the endothermic cracking of hydrocarbon fuels. 58,59 In this method, a LPBF printed Inconel substrate was first annealed at 550 1C to enable the migration of nickel atoms to the surface because nickel atoms provided sites for attachment of the Y-zeolites. To form a uniform dispersion of Y-zeolite, organic and inorganic binders along with peptizing agents were blended in water to obtain a uniform dispersion.…”

“…In the first step, the LPBF-printed structures are activated using thermal treatment to enable the migration of metal atoms to the surface. 58 These new metal centres act as active sites for subsequent growth and binding of carbon nanoparticles. In the second step, highly porous and fractal structured carbon nanostructures in the form of soot are deposited using vapor deposition.…”

Catalytic ammonia reforming: alternative routes to net-zero-carbon hydrogen and fuel

“…13 As a complement to these works, we recommend dedicated research efforts by the ammonia energy community to understand washcoated ( vs. powdered) catalyst performance and dynamic monolith cycling strategies for on-board NH 3 reforming. Advances in 3D printing of catalyst supports 108 and monolith structures 109,110 are a further avenue of promising research that may help mitigate effective surface area and volume constraints.…”