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A new regenerable process for the recovery of SO 2
Author(s) -
Erga Olav
Publication year - 1988
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.270110152
Subject(s) - stripping (fiber) , process (computing) , chemistry , absorption (acoustics) , buffer (optical fiber) , adipate , evaporation , sodium citrate , chemical engineering , phosphate , inorganic chemistry , materials science , organic chemistry , computer science , engineering , polymer chemistry , thermodynamics , medicine , telecommunications , physics , pathology , composite material , operating system
Increasing demand for regenerable processes with SO 2 recovery is to be expected. Advantages and limitations of the earlier developed citrate and adipate absorption/ steam stripping process are compared with those of the Wellman‐Lord (sulphite) process. On the basis of comprehensive laboratory studies, a new process is proposed which supplements the citrate and adipate process. In this new process, the absorbent is a concentrated sodium phosphate buffer and the loaded buffer is regenerated by evaporation. The main buffer component is Na 2 HPO 4 , but NaH 2 PO 4 is added in order to obtain a more complete stripping of SO 2 during regeneration. The new process promises excellent absorption properties for SO 2 with extremely low oxidation losses, regeneration with few incrustation problems and appreciable energy savings.