Bibliography Of Processes For Removing Hydrogen Sulfide From Industrial Gases

Author :
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (727 download)

DOWNLOAD NOW!

Download or read book Process Studies for a New Method of Removing H2S from Industrial Gas Streams written by and published by . This book was released on 1986 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A process for the removal of hydrogen sulfide from coal-derived gas streams has been developed. The basis for the process is the absorption of H2S into a polar organic solvent where it is reacted with dissolved sulfur dioxide to form elemental sulfur. After sulfur is crystallized from solution, the solvent is stripped to remove dissolved gases and water formed by the reaction. The SO2 is generated by burning a portion of the sulfur in a furnace where the heat of combustion is used to generate high pressure steam. The SO2 is absorbed into part of the lean solvent to form the solution necessary for the first step. The kinetics of the reaction between H2S and SO2 dissolved in mixtures of N, N-Dimethylaniline (DMA)/ Diethylene Glycol Monomethyl Ether and DMA/Triethylene Glycol Dimethyl Ether was studied by following the temperature rise in an adiabatic calorimeter. This irreversible reaction was found to be first-order in both H2S and SO2, with an approximates heat of reaction of 28 kcal/mole of SO2. The sole products of the reaction appear to be elemental sulfur and water. The presence of DMA increases the value of the second-order rate constant by an order of magnitude over that obtained in the glycol ethers alone. Addition of other tertiary aromatic amines enhances the observed kinetics; heterocyclic amines (e.g., pyridine derivatives) have been found to be 10 to 100 times more effective as catalysts when compared to DMA.