Improving the energy yield of plasma-based ammonia synthesis with in situ adsorption

Kevin H.R. Rouwenhorst*, Samuel Mani, Leon Lefferts*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

27 Citations (Scopus)
128 Downloads (Pure)


Plasma-based ammonia synthesis is studied as an option for electrifying the chemical industry. However, the energy efficiency of plasma-based ammonia synthesis is severely limited by ammonia decomposition in the plasma phase. We show that the use of zeolite 4A as an adsorbent for in situ ammonia removal from the plasma phase suppresses product decomposition, thereby increasing the ammonia yield. It is found that the ammonia yield for plasma-chemical ammonia synthesis with in situ ammonia removal is improved by a factor of 2 compared to steady-state plasma-chemical ammonia synthesis. Plasma-induced surface heating limits the effective ammonia adsorption capacity of the zeolite, decreasing the adsorption capacity. In situ product removal is of interest for plasma chemistry and plasma catalysis, in general, as the product decomposition in the plasma is a general phenomenon limiting the product yield.
Original languageEnglish
Pages (from-to)1994-2000
Number of pages7
JournalACS sustainable chemistry & engineering
Issue number6
Early online date2 Feb 2022
Publication statusPublished - 14 Feb 2022


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