(435h) Synthesis of Ammonia By RF Non-Thermal Plasma over Ni-MOF-74

Authors: 
Carreon, M., The University of Tulsa
Synthesis of Ammonia by RF non-thermal plasma over Ni-MOF-74

Javishk Shah1, Ting Wu2, Jolie Lucero2, Moises A. Carreon2 and Maria L. Carreon, 3*

1Russell School of Chemical Engineering, The University of Tulsa, 800 S Tucker Dr, Tulsa, OK 74104, US

2Department of Chemical and Biochemical Engineering, Colorado School of Mines, 1500 Illinois St, Golden, CO 80401, US

3Chemical and Biological Engineering Department, South Dakota School of Mines & Technology, 501 E. Saint Joseph St. Rapid City, SD, 57701, US

*mariacarreong@gmail.com

Keywords: Plasma Catalysis, Ni-MOF-74, Ammonia Synthesis, Metal-organic Frameworks, Non-Thermal Plasma.

Herein, we demonstrate a synergistic approach consisting on radiofrequency plasma to synthesize ammonia in the presence of Ni-MOF-74 as catalyst. The Ni-MOF displayed higher ammonia yields as com-pared to the pure Ni metal. Specifically, ammonia yields as high as 0.23 g-NH3 (kWh-g-catalyst)-1 and energy cost of 265 MJ mol-1 over Ni-MOF were observed. The enhanced catalytic activity of the Ni-MOF in the presence of plasma was attributed to the presence of pores that improved mass transfer of guest and product molecules during reaction, the presence of open Ni metal sites, and lower surface hydrogen re-combination. Furthermore, the ammonia energy yield of our plasma-Ni MOF catalyst is superior to those of the state-of-the-art RF plasma catalytic systems.