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Abstract

In this work, a simple predictive tool which is easier than existing approaches involving a fewer number of parameters, requiring less complicated and shorter computations, is presented to accurately predict carbon dioxide compressibility factor as a function of reduced temperature and reduced pressure. The proposed predictive tool shows consistently accurate results across the proposed pressure and temperature ranges. Predictions show an average absolute deviation of 0.55 % compared to existing Peng-Robinson (PR) and Soave-Redlich–Kwong (SRK) SRK equations of state which show an average absolute deviations of 0.58% and 2.30% respectively. This simple-to-use predictive tool can be of significant practical value for the engineers and scientists to have a quick check on carbon dioxide compressibility factor for temperatures up to 1000°C and pressures up to 50,000 kPa without the necessity of any experimental measurements. This is expected to benefit and making design decisions leading to informed decisions for rapid and accurate prediction carob dioxide compressibility factor in any process industry.

1. Introduction

Disposal and long-term sequestration of anthropogenic “greenhouse gases” such as CO₂ is a proposed approach to reducing global warming [1].  The potential for global warming caused by the production of carbon dioxide from burning fossil fuels is generating an increasing interest in the study of carbon dioxide sequestration [2] One sequestration method currently attracting attention from the scientific community consists of injecting carbon dioxide into saline aquifers , abandoned hydrocarbon reservoirs, or unminable coal seams [2]. The search for ways to reduce emissions and cut carbon from the world’s economy intensifies and current focus across the world is centered on CCS (Carbon Capture and Storage) technology, and trial operations are carried out in several places [3].

In fact,  carbon dioxide capture and storage (CCS), which involves the processes of capture, transport and long-term storage of carbon dioxide, is a technology aimed at reducing greenhouse gas emissions from burning fossil fuels during industrial and energy-related processes [4]. CCS has been verified as a key element in mitigating the climate change, along with other actions, such as improving energy efficiency, and switching to renewable energy resources reducing greenhouse gas emissions [5].