Journal of Analytical and Applied Pyrolysis 126 (2017) 397–404 Contents lists available at ScienceDirect Journal of Analytical and Applied Pyrolysis journal homepage: www.elsevier.com/locate/jaap Inﬂuence of CaO on urea pyrolysis in the selective non-catalytic reduction MARK deNO process Shi-long Fu, Qiang Song , Qiang Yao Key Laboratory of Thermal Science and Power Engineering of Ministry of Education, Department of Thermal Engineering, Tsinghua University, 100084 Beijing, China ARTICLE I NFO ABSTRACT Keywords: CaO aﬀects urea pyrolysis when coalescing with melting urea, which decreased the performance of urea-SNCR SNCR deNO process. The inﬂuence of CaO on urea pyrolysis was studied with a thermogravimetric analyzer, a ﬁxed CaO bed reactor, and DRIFTS. The mechanism of CaO was also analyzed. Experimental results showed that CaO Urea decreased the pyrolysis rate of urea, especially in the presence of O .NH production in urea pyrolysis was not 2 3 Pyrolysis inﬂuenced by CaO, whereas HNCO in the gaseous products disappeared and CO production was increased remarkably. NO, N O, and CO were also produced in the presence of O . DRIFTS experiments showed that Ca 2 2 (NCO) and CaCN were produced and the composition of the solid products varied with the atmosphere. 2 2 Mechanism
Journal of Analytical and Applied Pyrolysis – Elsevier
Published: Jul 1, 2017
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