API Publ 4680:1998 pdf download

API Publ 4680:1998 pdf download.AMINE UNIT AIR EMISSIONS MODEL EVALUATION.
The implementation of the 1990 Clean Air Act Amendments (CAAA) in the United States has caused the need for a reliable method to estimate and report hydrocarbon emissions from amine based sour gas and natural gas liquid (NGL) sweetening units. To address this need, a software simulation package, called Amine Unit Air Emission Model (AMINECaIc Version 1.0) was developed for the American Petroleum Institute (API) by DR Robinson Research Ltd. (DBRR).
Many of the amine units in the field are fitted with sulfur recovesy units (SRUs) to control hydrogen sulfide (H2S) and/or carbon dioxide (C02) and do not release volatile organic compounds (VOCs) and hazardous air poLlutants (IIAPs) to the atmosphere. However, some amine units do not have SRUs because they are used pnmanly to remove only CO2 from natural gas without H2S; consequently some amine regenerators have the potential to release HAPs and VOCs to the atmosphere. The AMINECa1c model was developed primarily for those units having the potential to emit VOCs and HAPs to the atmosphere
The calculation algorithm of this package is based on AMSIM, a commercial software package developed by DBRR.. Equipped with a rigorous non-equilibtiwn stage model and the PengRobinson equation of state, AMSIM was designed to provide accurate and reliable solutions for sour gas and liquefied petroleum gas processes. The emphasis of this commercial software package was on acid gas (H2S and C02) removal, and its predictions have been constantly verified by actual plant data.
The objective of the current project is to develop a PC-based emission model to predict HAPs and VOCs from flash tanks and solvent regenerators of a natural gas sweetening unit. The AMINECaIc model was re-engineered from AMSIM and enhanced to accommodate three types of calculations: mass balance calculation, gas process simulation, and NGL process simulation. The emphasis is on HAPs which include bcnzne, toluene, ethylbenzene and xylenes (BTEX), as well as VOCs emitted from amine units.
Amine unit operators may be required to report the emissions to the appropriate regulatory agencies. In order to gain wide acceptance by end users, special attention has been paid to the program interface design. Extensive computer literacy or simulation experience is not a requirement to operate the AMINECaJc simulator. Users with a basic knowledge of Windows should be at ease when using the program.