Sulfuric acid generation from hydrogen sulfide

Hydrogen suflide is a troubling compound generated in petroleum and coal refineries. Sulfur combined with organic compounds is separated by means of reacting with hydrogen in established industries right now and they practices it as best optimized operation. An ideology of integrating a simple process that can convert hydrogen sulfide into sulfuric acid in the refineries could help to solve the hydrogen sulfide handling problem.

Process ideology and reaction information:

Chemical reaction for the sulfuric acid generation process:

overall: H2S+ 2O2 → H2SO4

  • Gaseous hydrogen sulfide reactant is combusted with limited oxygen to produce sulfur monoxide. First step: H2S+ O2 → H2O + SO
  • Sulfur monoxide further reacted with oxygen for sulfur trioxide. Second step: SO+ O2 → SO3

Finally by absorbing the sulfur trioxide with water sulfuric acid is produced.

Input/output diagram for conversion process:

Sulfuric acid generation block diagram


Soda ash and sodium bicarbonate manufacturing

Sodium sulfate or brine is key raw material for manufacturing both sodium carbonate and bicarbonate. By reacting the sodium sulfate with calcium carbonate, soda ash is produced this method is called LeBlanc process and when brine and ammonia are used as reactants the process is referred to solvay process.

Sodium carbonate is reacted with carbon dioxide and H2O to form sodium bicarbonate. Along with this the byproducts calcium sulfate and calcium chloride are generated.

A functions diagram explains the process, each block in the figure represent the operations involved in manufacturing for LeBlanc and Solvay process.

process flow chart of soda ash and baking soda making

Sodium metal manufacturing

Sodium metal is prepared from sodium chloride as raw material. NaCl which we use as common salt is good source and highly available cheap stock. By processing it using electrolysis technology sodium metal is accumulated at cathode electrode.