Open AccessEffect of heating method on NO<sub>x</sub> decomposition on H<sub>3</sub>PW<sub>12</sub>O<sub>4</sub>0•6H<sub>2</sub>O
Author(s) -
Xueyang Zhang,
Lin Cheng,
Rui Wang
Publication year - 2013
Publication title -
bulletin of the chemical society of ethiopia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.288
H-Index - 25
eISSN - 1726-801X
pISSN - 1011-3924
DOI - 10.4314/bcse.v27i2.13
Subject(s) - chemistry , thermal decomposition , decomposition , phosphotungstic acid , nitrogen , analytical chemistry (journal) , reaction rate constant , nox , kinetics , catalysis , organic chemistry , quantum mechanics , combustion , physics
The thermal decomposition of nitrogen oxides (NOx) on phosphotungstic acid (H3PW12O40·6H2O or HPW) by two different heating methods is compared. Infra-red (IR) and X-ray diffraction (XRD) measurements are conducted to investigate the decomposition mechanism. Both heating methods, i.e. heating from 30 °C to 450 °C at a rate of 150 °C/min (“rapid heating”) and heating at a constant temperature of 450 °C (“constant-temperature heating”) lead to an actual, considerably high heating rate. Compared with rapid heating, however, constant-temperature heating results in enhanced N2 conversion (21.8%). Furthermore, the catalyst can be reused after decomposition at constant-temperature heating, while its performance quickly degrades after decomposition via rapid heating