Nox removal from gas mixture intensified by rotating packed bed with NaClO2 preoxidation.

[Display omitted] • A cross-flow rotating packed bed for NO x oxidation and removal was developed. • Oxidation degree was increased by 1.7 times after internal optimization. • Cross-flow rotating packed bed intensified mass transfer between NO x and Na 2 SO 3. • Oxidation degree and removal efficiency can reach up to 92% and 84% respectively. Stricter emission standards of NO x from marine exhaust call for efficient NO x removal method. In this work, a wet denitration intensification method conducted in novel Cross-flow rotating packed bed (CFRPB) reactor was proposed to meet the confined space requirement. In the CFRPB, the enhancement of oxidation and absorption were simultaneously achieved during NO x removal process. The NaClO 2 and Na 2 SO 3 solution were employed as liquid oxidant and absorbent, respectively. NO x oxidation was intensified by Gas-phase disturbance internal (GPDI) and multilayer wire mesh internals. The oxidation degree (α) was increased by 1.7 times after internal optimization. NO x absorption process was intensified via the high-gravity environment created by rotating packing. Effects of various operation parameters on NO x oxidation and absorption were also investigated. α and NO x removal efficiency (η) can reach up to 92% and 84%, respectively. Compared with traditional scrubbers, CFRPB has higher value of volumetric mass-transfer coefficient, which displays great potential for NO x removal from marine exhaust. [ABSTRACT FROM AUTHOR]