Techno-economic Comparison of Absorption and Adsorption Processes for Carbon Monoxide (CO) Separation from Linze-Donawitz Gas (LDG)

Abstract

Linze-Donawitz gas (LDG) adjunctively produced in the steel mill contains over 60% of CO. Two processes that recover high purity CO from LDG were considered: COSORB and CO-Pressure swing adsorption (PSA). This study aimed to decide which one is more economically feasible than the other by techno-economic analysis (TEA). From the technical point of view of TEA, the process flow diagram (PFD) was constructed, the mass and energy balances were calculated, and the equipment type and size were determined in order to estimate the total capital investment (TCI) and the total production cost (TPC). From the economic point of view of TEA, economic performance such as return on investment (ROI) and payback period (PBP) was evaluated, and the sensitivity analysis was carried out to identify key factors influencing ROI and PBP. It was found that CO-PSA is more economically feasible due to higher ROI and lower PBP. The CO price highly influenced ROI and PBP.

Aluminum Species and the Synthesis Mechanism of AlCl3–CuCl–Arene Solutions

“…Metal halides of III­(A) elements in the periodic table that act as Lewis acid sites can bind arenes to form XR 3 ·arene complexes (X = B, Al, Ga; R = F, Cl, Br). − XYR 4 ·arene complexes (X = B, Al, Ga; Y = Cu­(I), Ag­(I), Hg­(II); R = F, Cl, Br) can be obtained by adding transition-metal halides to XR 3 –arene solutions. − Haase was the first to synthesize a CuAlCl 4 –toluene solution, , which was discovered as an alternative absorbent for the recovery of carbon monoxide (CO) , and light alkenes. − A well-known process for recovering pure CO is the COSORB process . Most of the reports focused on the study of the kinetics and thermodynamics of the absorption process using AlCl 3 –CuCl–toluene solution. − CuAlCl 4 could be synthesized and existed stably. − Turner suggested that AlCl 3 –CuCl–arene solutions were formed by CuAlCl 4 and arenes . The interactions between arenes and CuAlCl 4 were charge-transfer bonds, confirmed by Toshima …”

Early-Stage Evaluation of Catalyst Using Machine Learning Based Modeling and Simulation of Catalytic Systems: Hydrogen Production via Water–Gas Shift over Pt Catalysts

“…Also, since Stream #7 has the equimolar contents of CO and H 2 in most cases, the separation performance of the H 2 PSA can be assumed to be constant for the sake of simplicity. The energy consumption of COSORB is almost electricity and heat, which can be estimated with the energy flows of the baseline process, as shown in eq EC italicu = EC Baseline , italicu × n CO , 5 n CO , Baseline where EC u and EC Baseline, u are the energy consumption [kW] of the unit and baseline of each utility type u .…”

Synergies between Direct Air Capture Technologies and Solar Thermochemical Cycles in the Production of Methanol

“…The chosen technology in the final simulation is liquid absorption, but other alternatives have also been considered. According to literature, vacuum-pressure swing adsorption (VPSA) of carbon monoxide [44] could be a competitive alternative, while cryogenic distillation or membrane separation have too high energy consumptions [45][46][47]. In addition, the possibility of using the already available DAC equipment in order to remove the unreacted CO 2 is studied, which is a novel approach.…”