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Nitric oxide absorption by hydrogen peroxide in airlift reactor: a study using response surface methodology
Bhanarkar, A.D.; Gupta, R.K.; Biniwale, R.B. & Tamhane, S.M.
Abstract
Absorption of nitric oxide from nitric oxide /air
mixture in hydrogen peroxide solution has been studied on
bench scale internal loop airlift reactor. The objective of
this investigation was to study the performance of nitric
oxide absorption in hydrogen peroxide solution in the airlift
reactor and to explore/determine the optimum conditions
using response surface methodology. A Box–
Behnken model has been employed as an experimental
design. The effect of three independent variables—namely
nitric oxide gas velocity, 0.02–0.11 m/s; nitric oxide gas
concentration, 300–3,000 ppm and hydrogen peroxide
concentration, 0.25–2.5 %—has been studied on the
absorption of nitric oxide in aqueous hydrogen peroxide in
the semi-batch mode of experiments. The optimal conditions
for parameters were found to be nitric oxide gas
velocity, 0.02 m/s; nitric oxide gas concentration,
2,246 ppm and hydrogen peroxide concentration, 2.1 %.
Under these conditions, the experimental nitric oxide
absorption efficiency was observed to be ~65 %. The
proposed model equation using response surface methodology
has shown good agreement with the experimental
data, with a correlation coefficient (R2) of 0.983. The
results showed that optimised conditions could be used for
the efficient absorption of nitric oxide in the flue gas
emanating from industries
Keywords
Nitric oxide absorption; Response surface methodology; Box–Behnken experimental design; Hydrogen peroxide; Optimisation
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