Читать книгу Process Intensification and Integration for Sustainable Design - Группа авторов - Страница 30

To illustrate the applicability of the proposed approach, a case study is solved based on representative data for the Barnett Shale Play in Texas. The key objectives of the case study include:

 Design of a base case and several additional process designs for different feed compositions

 Economic evaluations of the proposed designs

 Process safety evaluation of the proposed designs

 Sensitivity analysis where product and feedstock prices are varied based on standard deviations from historical price data

To streamline the study, the following assumptions are made:

 Average flow rate, temperature, and pressure: Although the flow rate, temperature, and pressure of shale gas coming out of the well can vary significantly, it was assumed that wellhead gas is sent to a centralized processing facility where these values on average would be relatively constant, and only composition would vary. Additionally it is common for gas to be saturated with water because water is sent down the well to maintain well pressure. It is not uncommon for there to also be free water in the incoming gas stream; however this is easily removed using a knockout drum on the front end of the process at minimal cost.

 Inlet feeds enter the processing plant at a standard vapor volumetric flow of 150 million standard cubic feet per day (MMSCFD), 100 °F, and 1000 psig. The Peng–Robinson equation of state was used in the process simulation model.

 The gas feedstock is saturated with water.