Carbon Capture and Storage Energy Consumption and Performance Optimization Using Metamodels and Response Surface Methodology

Abstract

Oil and gas industries have high carbon dioxide (CO2) emissions, which is a great environmental concern. Monoethanolamine (MEA) is widely used as a solvent in CO2 capture and storage (CCS) systems. The challenge is that MEA–CCS itself is an energy-intensive process that requires optimum configuration and operation, and numerous design parameters and heat demands must be considered. Thus, the current work evaluates the energy distributions and CO2 removal efficiency of a CCS installed in floating production storage and offloading units under different operating conditions of a power- and heat-generation hub. The optimization procedures are implemented using highly accurate surrogate models for the following responses: 1) overall power consumption of CCS, 2) CCS separation performance, and 3) CCS heating and cooling demands. The input variables considered in the present research include the following: 1) the exhaust gas compositions and mass flow rate, 2) the operating pressure and temperature parameters of CCS and the injection compression unit, 3) the structural parameters of absorber and stripper columns, and 4) MEA solution parameters. The optimum CCS configuration significantly reduces the total heating and cooling demands by 62.77% (7 × 106 kW) and the overall power consumption by 8.65 % (1.8 MW), and it increases the CCS separation performance by 4.46% (97.46%) and mitigates the CO2 emissions of proper CCS by 1.02 t/h compared with conventional operating conditions.

Integration of the Compression Units of the Processing Plant with an Organic Rankine Cycle for Power Generation and Cooling Process

“…The carbon capture unit or the CO2 removal unit presents a huge cooling demand for the condenser of the stripper tower, which is a significant source of waste heat for use in the organic Rankine cycle [5].…”

“…These steps need precooling, intercooling, and cooling to meet the required operating temperature. Therefore, the required cooling demands reach 100 MW for a typical processing plant [5,6]. Conversely, due to the high operating pressure and temperature of the gas compression unit, the equipment used is energy-intensive and is not thermodynamically efficient [7].…”

Optimization of novel nonaqueous hexanol‐based monoethanolamine/methyl diethanolamine solvent forCO2absorption

“…The experimental data reflected a percentage error between 0.6% and 2.11% when compared against the predicted results. Ali et al 45 evaluated the energy distribution and CO 2 removal efficiency of an aqueous MEA solvent system, which was then optimized using metamodels and RSM. The optimized configuration reduced heating and cooling demands by 62.77%, reduced total power consumption by 8.65%, and increased the separation performance by 4.46% in comparison with conventional processes.…”