Abstract SYMPHOS 2011

This contribution gives an overview about the chances improving the conversion efficiency of the catalytic SO 2
oxidation, the requirements and the limitations of the oxidation process.
BASF’s current developments in the field of low temperature sulphuric acid production catalysts is a new catalyst
type, called O4-116. BASF upgrades its catalyst portfolio by this second Cs-promoted vanadium-based SO 2
oxidation catalyst which is specially designed for last bed application. By adapting the chemical composition to a
new silica support, catalytic reactivity could be drastically increased under SO 2 lean conditions and at temperatures
below 400 _C compared to the standard O4-115.
50
Weiss Walter
MECSGLOBAL
BELGIQUE
MECS has developed a significant improvement to its heat recovery system (HRS) technology called SteaMax HRS.
SteaMax HRS improves the energy efficiency of a sulfuric acid plant by replacing conventional absorption dilution
water with steam, which is injected in the ductwork ahead of the HRS tower. SteaMax HRS is a natural extension
of MECS’s successful steam injection technology, which had previously limited the ratio of dilution steam to dilution
water to minimize the risk of duct corrosion and the potential for mist formation.
Kathleen Brown, Kyle Bade, and Rudolf J. Schick*
Spray Analysis and Research Services
Spraying System Company Wheaton
IL 60187 USA
STEAMAX HRS MECS INC.
SW-O-04
COMPUTATIONAL MODEL OF LARGE CAPACITY MOLTEN SULFUR
COMBUSTION SPRAY EFFICACY AND PROCESS EFFICIENCY
SW-O-05
The use of precision spray injectors with advanced technology nozzles in the combustion of molten sulfur represents
an active and growing field. The efficient combustion of large molten sulfur volumes is a clear requirement in
the phosphate creation industry. Spraying Systems Company, along with our industry partners, have conducted
significant research both the laboratory as well as in full scale industrial setting to arrive at optimized process
solutions for this application. Additionally, Computational Models have been developed to allow for the assessment
and optimization of the sulfur combustion efficacy. This paper presents the results of a detailed spray injection
modeling study demonstrating the scale up of the spray solution as well as the 100% spray combustion requirement
at these elevated sulfur flow capacities. Through the use of the models developed here, the sulfur combustion was
improved beyond that which was possible using experimental results.