The Experts below are selected from a list of 93 Experts worldwide ranked by ideXlab platform

Ashleigh Cousins - One of the best experts on this subject based on the ideXlab platform.

  • a technology review for regeneration of sulfur rich amine systems
    International Journal of Greenhouse Gas Control, 2018
    Co-Authors: Bharti Garg, Vincent T Verheyen, Pauline Pearson, Paul Feron, Ashleigh Cousins
    Abstract:

    Abstract Reducing the capital cost of post combustion CO2 capture by eliminating Flue Gas Desulfurisation (FGD) pre-treatment, requires management of the amines preferential SO2 absorption. Novel technologies such as CS-Cap restrict the impact of SO2 to only a small fraction of the amine inventory resulting in high sulfate burden amines. Traditional thermal reclamation of these spent absorbents has advantages regarding simplicity, but ranks poorly for industrial ecology around PCC. These amines require low energy regeneration technologies compatible with their physico-chemical properties that also maximise the potential for valorising by-products. This review summarises the sulfur chemistry and outlines several amine reclamation processes. It assesses the status of established and novel regeneration technologies for their applicability to high sulfur loaded amines. Should deep sulfur removal be required, a hybrid approach with initial bulk removal (as product) followed by a polishing step to further reduce sulfur is prospective. A preliminary estimation of the relative cost of using standard reclamation methods for treating Sulfur loaded CS-Cap absorbent revealed the cost would increase due to its higher sulfate burden despite comparable treatment volumes. Research gaps are identified which would enable better comparison between the costs of traditional FGD versus higher reclamation costs for combined capture technologies.

A Tomas - One of the best experts on this subject based on the ideXlab platform.

  • detailed modelling of a Flue Gas Desulfurisation plant
    Computers & Chemical Engineering, 2007
    Co-Authors: Antonio Gomez, Norberto Fueyo, A Tomas
    Abstract:

    Abstract This paper presents a CFD model for a Flue-Gas Desulfurisation plant, and its application to an operating plant. The FGD plant is of the wet-scrubber type, with co-current and counter-current sections. The sorbent used is limestone, and, after cleaning the Flue Gases, the limestone slurry is collected in an oxidation tank for the production of gypsum. The model uses an Eulerian–Eulerian treatment of the multiphase flow in the absorber and the tank. The essential mass-transfer mechanisms (such as SO2 and O2 absorption and CO2 desorption) are accounted for, as are also the main chemical kinetics leading to the formation of gypsum. Given the different nature of the flow in the absorber and tank, two separate simulations are conducted for each of these domains, and the solutions are iteratively coupled through boundary conditions during the calculations. The model is applied to the FGD plant of the Teruel powerstation located in Andorra (Teruel, Spain). The powerstation is fired with a high-sulfur coal (up to 4.5 percent), and the FGD system has been designed for a Desulfurisation capacity of 1.4 million N m3/hr for a Desulfurisation efficiency in excess of 90 percent. Validation of the model is conducted by comparison with available plant data for two design coals and two Desulfurisation efficiencies. The model accuracy is reasonable, given the complexity of the aero/hydrodynamical and thermo-chemical phenomena involved.

Jessica Obrien - One of the best experts on this subject based on the ideXlab platform.

  • the electrochemical oxidation of aqueous sulfur dioxide a critical review of work with respect to the hybrid sulfur cycle
    Electrochimica Acta, 2010
    Co-Authors: Jessica Obrien, Jim Hinkley, Scott W Donne, Steneric Lindquist
    Abstract:

    Literature regarding the mechanism of the electrochemical oxidation of aqueous sulfur dioxide to sulfuric acid has been critically evaluated to provide a detailed understanding of the reaction under various applied conditions. This reaction is of high relevance to the hybrid sulfur cycle for large scale hydrogen production, as well as other industrial applications such as Flue Gas Desulfurisation. Widespread disagreement in the literature and non-reproducible behaviour of the electrochemical oxidation reaction has been found in this review to often be a result of poorly defined electrode preconditioning procedures. It has also been found that the mechanistic pathway of the oxidation reaction is heavily inFluenced by the electrode material, solution pH and the applied anodic potential. These factors are thought to inFluence adsorption and the reductive formation of sulfur species at low potentials.

Aaron Cottrell - One of the best experts on this subject based on the ideXlab platform.

  • an advanced ammonia based combined nox sox co2 emission control process towards a low cost clean coal technology
    Applied Energy, 2020
    Co-Authors: Kaiqi Jiang, Linghong Chen, Mengxiang Fang, Merched Azzi, Aaron Cottrell
    Abstract:

    Abstract Traditional method of removing Gas pollutants from a coal-fired power station involves a series of separate processes, which include selective catalytic reduction for NOx treatment, Flue Gas Desulfurisation for SOx removal, and post-combustion CO2 capture. Each of these individual processes involves significant capital investment. To reduce costs, we propose an alternative approach to simultaneously remove these three pollutants by incorporating NOx/SOx treatment into an aqueous NH3-based CO2 capture process. In our advanced process design, NOx/SOx pollutants are effectively scrubbed by sodium chlorite (NaClO2) oxidizing reagent, with the resultant acidic solution efficiently reducing NH3 emissions from CO2 absorber to

Kazimierz Darowicki - One of the best experts on this subject based on the ideXlab platform.

  • degradation of protective coatings in steel chimneys of Flue Gas Desulfurisation systems
    Progress in Organic Coatings, 2018
    Co-Authors: Stefan Krakowiak, Kazimierz Darowicki
    Abstract:

    Abstract This paper presents problems associated with corrosion of steel stacks and changes in philosophy of corrosion protection when implemented into Flue Gas desulphurization systems. In-situ tests were taken by means of electrochemical impedance spectroscopy at the stack which discharges Flue Gas before wet lime/limestone desulphurization. A very quick electrolyte absorption by the spherical infill vinylester coating was found using the electrochemical impedance spectroscopy. An analysis of destruction shows a joint effect of mechanical and corrosion factors on the poor resistance of the coating. The poor resistance of the coating is also connected with the method of chimney construction and coating application.