Imperial College London

MrRenatoPereira Cabral

Faculty of Natural SciencesCentre for Environmental Policy

Visiting Researcher
 
 
 
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Contact

 

r.cabral15 Website CV

 
 
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Location

 

60516 Prince's GardensSouth Kensington Campus

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Summary

 

Publications

Publication Type
Year
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7 results found

Cabral RP, Bui M, Dowell NM, 2019, A synergistic approach for the simultaneous decarbonisation of power and industry via bioenergy with carbon capture and storage (BECCS), International Journal of Greenhouse Gas Control, Vol: 87, Pages: 221-237, ISSN: 1750-5836

There is a need for a rapid and large scale decarbonisation to reduce CO2 emissions by 45% within 12 years. Thus, we propose a method that accelerates decarbonisation across multiple sectors via a synergistic approach with bioenergy with CCS (BECCS), which is able to remove 740 kgCO2 from air per MWh electricity generated. Industry is a hard-to-decarbonise sector which presents a unique set of challenges where, unlike the power sector, there are no obvious alternatives to CCS. One of these challenges is the significant variation of CO2 concentration, which directly influences CO2 capture costs, ranging from $10/tCO2 to over $170/tCO2 for high (95–99% CO2) and low CO2 concentration (4% CO2) applications, respectively. Re-purposing the existing coal-fired power plant fleet into BECCS displaces CO2 emissions from coal-use and enables a just transition, i.e., avoiding job loss, providing a supportive economic framework that does not rely on government subsidies. Negative emissions generated from capturing and storing atmospheric CO2 can be converted into negative emission credits (NECs) and auctioned to hard-to-decarbonise sectors, thus providing another revenue stream to the power plant. A levelised cost of electricity (LCOE) between $70 and $100 per MWh can be achieved through auctioning NECs at $90–$135 per tCO2. Offsetting the global industrial CO2 emissions of 9 GtCO2 would require 3000 BECCS plants under this framework. This approach could jumpstart industrial decarbonisation whilst giving this sector more time to develop new CCS technologies.

Journal article

Cabral RP, Heldebrant DJ, Mac Dowell N, 2019, A Techno-Economic Analysis of a Novel Solvent-Based Oxycombustion CO <inf>2</inf> Capture Process, Industrial and Engineering Chemistry Research, ISSN: 0888-5885

Copyright © 2019 American Chemical Society. The gas processing unit (GPU) has previously been identified as the least thermodynamically efficient element of an oxycombustion process. A marginal improvement of this unit operation can provide a greater decrease of the parasitic power to the oxycombustion process than an equivalent improvement in the air separation unit (ASU). Hence, capturing CO 2 from oxycombustion using an alternative method than the conventional cryogenic process has potential to reduce the parasitic power consumption of the GPU. In this work, the authors present an initial evaluation of a new process concept; a hybrid oxycombustion process that uses a solvent-based GPU to capture CO 2 from the flue gas. N-Ethyldiethanolamine (EDEA) is a tertiary alkanolamine that captures CO 2 by forming a zwitterionic ammonium alkylcarbonate ionic liquid in the absence of water as a cosolvent. The new solvent-based GPU proposed herein demonstrates a clear potential to improve the net power efficiency by 1%, a 9% CAPEX reduction, and up to 5% LCOE reduction of an oxycombustion process if the price of EDEA is below $270/kg. Both lower CAPEX and the potential of reduced LCOE demonstrates that alternative CO 2 capture methods for oxycombustion can be more economical.

Journal article

Tavares M, Cabral RP, Costa C, Martins P, Fernandes AR, Casimiro T, Aguiar-Ricardo Aet al., 2017, Development of PLGA dry powder microparticles by supercritical CO<sub>2</sub>-assisted spray-drying for potential vaccine delivery to the lungs, JOURNAL OF SUPERCRITICAL FLUIDS, Vol: 128, Pages: 235-243, ISSN: 0896-8446

Journal article

Cabral R, Mac Dowell N, 2017, A novel methodological approach for achieving $/MWh cost reduction of CO2 capture and storage (CCS) processes, Applied Energy, Vol: 205, Pages: 529-539, ISSN: 1872-9118

Carbon capture and storage is widely recognised as essential for the cost effective decarbonisation of the power and industrial sectors. However its capital and operating costs remain a barrier to deployment, with significant reduction in the cost per unit of decarbonised product considered vital. In the context of power generation, this is best expressed in terms of cost per MWh of electricity generated. To achieve a meaningful reduction in the cost of low carbon electricity, capital costs must also be reduced. Thus, this work presents a novel approach for identifying system improvements via a combination of process integration and intensification based on minimisation of thermodynamic losses. Application of this methodology to an oxy-combustion CCS process led to a 3% increase of net efficiency and a 13% reduction of £/MWh of electricity.

Journal article

Silva AS, Sousa AM, Cabral RP, Silva MC, Costa C, Miguel SP, Bonifacio VDB, Casimiro T, Correia IJ, Aguiar-Ricardo Aet al., 2017, Aerosolizable gold nano-in-micro dry powder formulations for theragnosis and lung delivery, INTERNATIONAL JOURNAL OF PHARMACEUTICS, Vol: 519, Pages: 240-249, ISSN: 0378-5173

Journal article

Restani RB, Sofia Silva A, Pires RF, Cabral R, Correia IJ, Casimiro T, Bonifacio VDB, Aguiar-Ricardo Aet al., 2016, Nano-in-Micro POxylated Polyurea Dendrimers and Chitosan Dry Powder Formulations for Pulmonary Delivery, PARTICLE & PARTICLE SYSTEMS CHARACTERIZATION, Vol: 33, Pages: 851-858, ISSN: 0934-0866

Journal article

Cabral RP, Sousa AML, Silva AS, Paninho AI, Temtem M, Costa E, Casimiro T, Aguiar-Ricardo Aet al., 2016, Design of experiments approach on the preparation of dry inhaler chitosan composite formulations by supercritical CO<sub>2</sub>-assisted spray-drying, JOURNAL OF SUPERCRITICAL FLUIDS, Vol: 116, Pages: 26-35, ISSN: 0896-8446

Journal article

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