Publications
The Ca-Cu looping process using natural CO2 sorbents in a packed bed: Operation strategies to accommodate activity decay
The Ca-Cu looping process is a promising CO2 capture technology designed to produce H2 and power from a fuel gas. The use of inexpensive and widely available limestone would facilitate the scale up of this technology. This work proposes a novel strategy for packed-bed Ca-Cu looping processes consisting of loading the sufficient amount of CuO to calcine only a well-defined fraction of CaCO3 in every cycle during the transient period until the limestone reaches a residual solid conversion of...
Puncture Failure Size Probability Distribution for CO2 Pipelines
The safe operation of pressurised CO2 pipelines is key to the success of Carbon Capture and Storage as a viable means for tackling global warming. However, given their relatively small number currently in operation, the confident prediction of their puncture size failure probability and how it compares with hydrocarbon pipelines are fundamentally important questions that must be resolved. This paper presents the development and application of a robust statistical analytical technique for the...
Multi-objective economic and environmental assessment for the preliminary design of CO2 transport pipelines
A methodology based on the multi-objective optimisation of economic and environmental aspects is presented to support the preliminary design of CO2 transport pipelines employed as part of Carbon Capture and Storage (CCS) systems. Pareto optimal design solutions are determined for a realistic point-to-point CO2 pipeline using Level Diagrams and choosing the Nominal Pipe Size (NPS) as a decision variable. A quantitative procedure entailing the definition of economic and environmental key...
Blast furnace gas decarbonisation through Calcium Assisted Steel‐mill Off‐gas Hydrogen production. Experimental and modelling approach
The Calcium Assisted Steel-mill Off-gas Hydrogen production process (CASOH) is able to upgrade and decarbonise blast furnace gases (BFG), which is the main source of CO2 emissions in integrated steel making plants. The three main reaction stages of the process (i.e. H2 production via calcium-assisted water-gas-shift of BFG, Cu oxidation and CO2 sorbent regeneration) have been investigated in a lab-scale fixed bed reactor, using readily available functional materials (i.e. a commercial Cu-based...
Perspectives on Future CCUS Infrastructure Design
Authors:Jude O. Ejeh, Ahmed Z. Yousef, Peter Bugryniec, Mathew Dennis Wilkes, Richard T. J. Porter, Sergey Martynov, Haroun Mahgerefteh, Solomon Brown
Journal:Proceedings of the 16th Greenhouse Gas Control Technologies Conference
Application of the Henry’s law model for prediction of the vapour-liquid equilibria in impure CO2 streams
This report evaluates the impact of CO2 streams impurities on the formation of solid CO2 in pipelines for realistic venting decompression scenarios.
DISPLACE Technology to Efficiently Decarbonize Steel Industry
This paper presents the application of an innovative adsorption process called DISPLACE to capture CO2 from the steel plant flue gases. In this process, the CO2 is adsorbed onto the sorbent due to high partial pressures of CO2 which is then displaced by H2O adsorption on shared adsorption sites. The process is for the first time applied to steel plant, therefore a preliminary process optimization must be carried out focusing on the feed pressure as main parameter: the higher the pressure, the...
The Work and Preliminary Results of the C4U Project on Advanced Carbon Capture for Steel Industries Integrated in CCUS Clusters
This report evaluates the impact of CO2 streams impurities on the formation of solid CO2 in pipelines for realistic venting decompression scenarios.
CO2 MEA Capture: A Gaussian Process-Based Global Sensitivity Analysis
In this work, we present a variance-based global sensitivity analysis (GSA) using Gaussian process (GP) surrogate models to calculate the semi-analytic Sobol’ indices for a carbon dioxide (CO2), post-combustion capture (PCC) process. Using the open-source ROM-COMMA software library, the generated GP surrogate model enables accurate process output prediction, and calculation of the semi-analytic Sobol’ indices for GSA. We apply this methodology to a case study of a CO2 PCC process with 30 wt.%...
Lab-Scale Experimental Demonstration of Ca-Cu Chemical Looping for Hydrogen Production and In-Situ Co2 Capture from a Steel-Mill
This paper summarises lab findings on decarbonizing mixtures of inlet gases to simulate the composition of blast furnace gases from steel production and convert them into hydrogen-rich streams.
Preliminary Techno-Economic Evaluation of Blast Furnace Gas Utilisation with Ca-Cu looping Cycle Integrated with CO2 Separation by Partial Condensation
The iron and steel (I&S) industry, an energy-intensive sector and one of the significant contributors to global CO2 emissions accounted for approximately 2.6 Gt of direct CO2 emissions in 2019. BFG has a higher ratio of CO and CO2 compared to other I&S off-gases (coke oven gas and basic oxygen furnace gas). On the other hand, BFG has lower LHV than the other two off-gases due to higher N2 and CO2 concentrations. Therefore, effective CO2 removal from BFG is more cost-effective than...
CO2 Pipeline Operability and Safety Impacts
This report evaluates the impact of CO2 streams impurities on the formation of solid CO2 in pipelines for realistic venting decompression scenarios.