Research Article
Process Revamping of H2SO4Plant to Double Contact Double Absorption (DCDA) Using ASPEN HYSYS to Reduce SO2Emission: Case of Awash Melkassa Sulfuric Acid Factory
@INPROCEEDINGS{10.1007/978-3-030-93709-6_5, author={Addis Lemessa and Melkamu Birlie and Metadel Kassahun and Yared Mengistu}, title={Process Revamping of H2SO4Plant to Double Contact Double Absorption (DCDA) Using ASPEN HYSYS to Reduce SO2Emission: Case of Awash Melkassa Sulfuric Acid Factory}, proceedings={Advances of Science and Technology. 9th EAI International Conference, ICAST 2021, Hybrid Event, Bahir Dar, Ethiopia, August 27--29, 2021, Proceedings, Part I}, proceedings_a={ICAST}, year={2022}, month={1}, keywords={SO2 emission H2SO4 Aspen HYSYS Simulation SCSA DCDA}, doi={10.1007/978-3-030-93709-6_5} }- Addis Lemessa
Melkamu Birlie
Metadel Kassahun
Yared Mengistu
Year: 2022
Process Revamping of H2SO4Plant to Double Contact Double Absorption (DCDA) Using ASPEN HYSYS to Reduce SO2Emission: Case of Awash Melkassa Sulfuric Acid Factory
ICAST
Springer
DOI: 10.1007/978-3-030-93709-6_5
Abstract
Sulfur dioxide (SO2) is identified as among one of the major air pollutant gases in the globe. SO2cause severe adverse effects on the respiratory system of all living things and causes several difficulties in the environment such as acid rain and plant growth retardation. This work presents a virtual experimental investigation of the simulation of H2SO4using Double contact double absorption (DCDA) to reduce the SO2emission. Awash Melkassa Aluminum Sulfate and Sulfuric Acid Share Company (AMASSASC) produce Sulfuric acid by using single contact single absorption (SCSA) which releases up to 3% SO2to the atmosphere. In this work, the simulation uses ASPEN HYSYS with Antoine based fluid package to predict several values. The major unit operation involved in the design includes four consecutive converters and absorption columns including the proposed intermediate absorber and secondary absorber. Different recycle setup configuration was considered to achieve the best possible SO2reduction. The effect of inlet temperature, split ratio of mass to the modeled absorber in response to the final SO2amount was studied. From the optimal design it was able to reduce SO2to 0.12 mol%. The trade-off between utility power consumption and SO2emission for different design options was also studied to obtain optimal design setup.
