Parameter Optimization Of Carbon Dioxide Pipeline Transportation

With the continuous development of industry, human demand for fossil fuels continues to rise, sustained increase in CO₂ emissions has led the greenhouse effect, causing global warming. Meanwhile, natural gas exploration have developed high CO₂ gas fields, a comprehensive resource for CO₂ utilization become focus of attention of countries. CO₂ capture, storage and use of technology（CCUS） came into being. CO₂ transport is an important part of CO₂ from capture to storage or to use, and the important part which connected to the recovery and permanent storage locations. This paper mainly discuss CO₂ pipeline optimization techniques.This paper investigates the typical CO₂ pipeline transport project and research status, and preliminary summary of the CO₂ pipeline law. Due to the special physical properties of CO₂（lower critical temperature and critical pressure）, so first, study the physical properties of pure CO₂ and impure CO₂ physical properties and correlative discipline by Hysys software simulation. Make a research and analysis for supercritical CO₂ characteristics. Then, study of comparing the transmission phase, equation of state, calculation of the optimal diameter, establish the CO₂ pipeline parameter optimization models. Meanwhile establish the economic model of CO₂ pipeline, as the optimization objective function to optimize diameter and transmission pressure. In the end, for a given optimization problem examples, simulate pipeline gas physical parameters by Hysys software and calculate the optimal diameter by Matlab programming, under the economic model for the optimization objective function, based on the phase stability and lowest cost of CO₂ pipeline, to obtain the optimum transport diameter and pressure, and make the sensitivity analysis of pipe inlet temperature and ambient temperature.