Recent Progress on Hydrogen Production from Ammonia Decomposition: Technical Roadmap and Catalytic Mechanism

Abstract

Ammonia decomposition has attracted significant attention in recent years due to its ability to produce hydrogen without emitting carbon dioxide and the ease of ammonia storage. This paper reviews the recent developments in ammonia decomposition technologies for hydrogen production, focusing on the latest advances in catalytic materials and catalyst design, as well as the research progress in the catalytic reaction mechanism. Additionally, the paper discusses the advantages and disadvantages of each method and the importance of finding non-precious metals to reduce costs and improve efficiency. Overall, this paper provides a valuable reference for further research on ammonia decomposition for hydrogen production.

A Review of the Recent Advances in Composite Membranes for Hydrogen Generation Technologies

“…Ammonia (NH 3 ) is considered an energy carrier with a high hydrogen storage capacity (17.7 wt %) and it can be easily liquefied at mild conditions (20 °C and 8.6 bar). − The synthesis of ammonia from elemental hydrogen and nitrogen molecules can occur in the presence of precious metal catalysts such as palladium (Pd) and its alloys with Ag, Cu, Ni, and Pt metals. Since performing the catalytic decomposition and the purification of H 2 gas separately is more energy-consuming and complicated, a high yield and purity of H 2 production can be achieved with a compact membrane reactor design. − In recent studies, high-purity H 2 production in catalytic membrane reactors employing various catalysts and composite membranes has been reported.…”

Ammonia Can be Currently Considered as one of the Best Green Energy Ally

“…The cracking of ammonia has been studied by several authors [167][168][169], proposing the use of thermal catalytic reactors that allow reducing reaction temperature. Catalysts commonly employed contain noble metals (Rh, Ru, Pd, Pt, among others), but also Fe and Ni have been tested in order to reduce costs and dope the catalyst with rare earth metals to increase activity or using bimetallic configurations [170,171]. The industrial application of this technology at large scale has been reviewed by Spatolisano et al [172], analyzing implications of technology deployment.…”

Ammonia Can Be Currently Considered One of the Best Green Energy Allies

“…The cracking of ammonia has been studied by several authors [195][196][197], proposing the use of thermal catalytic reactors that allow reduction in reaction temperature. Catalysts commonly employed contain noble metals (Rh, Ru, Pd, and Pt, among others), but Fe and Ni have also been tested in order to reduce costs and dope the catalyst with rare-earth metals to increase activity, in addition to the use of bimetallic configurations [198,199]. The industrial application of this technology at a large scale was reviewed by Spatolisano et al [200], analyzing the implications of technology deployment.…”