Morpholine nitrosation to better understand potential solvent based CO 2 capture process reactions

Payal A. Chandan, Joseph E. Remias, James K. Neathery, Kunlei Liu

Research output: Contribution to journalArticlepeer-review

33 Scopus citations

Abstract

The amine assisted CO2 capture process from coal fired power plants strives for the determination of degradation components and its consequences. Among them, nitrosamine formation and their emissions are of particular concern due to their environmental and health effects. The experiments were conducted using morpholine as a representative secondary amine as a potential CO2 capture solvent with 100 ppm standard NO 2 gas to better understand the nitrosamine reaction pathways under scrubber and stripper conditions. The role of nitrite in the nitrosation reaction was probed at elevated temperatures. The effects of different concentrations of nitrite on morpholine were evaluated. Formation rate, decomposition rates, activation energy, and the possible reaction pathways are elaborated. Thermal stability tests at 135 C indicated the decomposition of nitrosamines at the rate of 1 μg/(g h) with activation energy of 131 kJ/mol. The activation energy for the reaction of morpholine with sodium nitrite was found as 101 kJ/mol. Different reaction pathways were noted for lower temperature reactions with NO2 gas and higher temperature reactions with nitrite.

Original languageEnglish
Pages (from-to)5481-5487
Number of pages7
JournalEnvironmental Science and Technology
Volume47
Issue number10
DOIs
StatePublished - May 21 2013

ASJC Scopus subject areas

  • Chemistry (all)
  • Environmental Chemistry

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