Reactive Absorption Technology - Process Intensification for Green Chemistry - page 295

Figure 11.4 Flow sheet of a modern sulfuric acid production plant [16]. Reprinted from Kiss
et al.

# 2010, with permission from Elsevier.

acid, either a single-pressure process (1-14 bar for oxidation and absorption) or a dual-
pressure process (1.0-6.5 bar for oxidation and 6.5-13.0 bar for absorption) is applied.
Most new plants work with dual-pressure processes based on the oxidation of ammonia-
as illustrated in Figure 11.6 [24]. An air-NH 3 mixture of 9 : 1 is catalytically converted
mainly to NO, which is afterwards oxidized and reacted with residual O 2 to form NO 2

Figure 11.5 Temperature and composition profiles along RA columns. Reprinted from Kiss
et al. # 2010, with permission from Elsevier.