Tube-wall catalytic membrane reactor for hydrogen production by low-temperature ammonia decomposition. (3rd June 2021)

• Record Type: Journal Article
• Authors: Itoh, Naotsugu; Kikuchi, Yosuke; Furusawa, Takeshi; Sato, Takafumi
• Is Part Of: International journal of hydrogen energy. Volume 46:Number 38(2021)
• Page Start: 20257
• Page End: 20265
• Publication Date: 2021-06-03
• Subjects: Ammonia -- Hydrogen -- Palladium -- Tube wall reactor -- Membrane reactor; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2020.03.162
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: Ammonia has attracted great interest as a chemical hydrogen carrier. However, ammonia decomposition is limited kinetically rather than thermodynamically below 400 °C. We developed a tube-wall catalytic membrane reactor that could decompose ammonia with high conversion even at temperatures below 400 °C. The reactor had excellent heat transfer characteristics, and thus nearly 100% conversion for an NH3 feed of 10 mL/min at 375 °C was achieved with a 2-μm-thick palladium composite membrane, and hydrogen removal from the decomposition side resulted in a large kinetic acceleration. Graphical abstract: Image 1 Highlights: Ammonia decomposition is limited kinetically rather than thermodynamically below 400 °C. A new type reactor, i.e., tube-wall catalytic membrane reactor (TWMR) was proposed. The TWMR consists of a tube-wall catalyst and a palladium membrane tube. Nearly 100% conversion at 375 °C was obtained by using a 2 μm thick palladium membrane.