Imperial College London

Paul Fennell

Faculty of EngineeringDepartment of Chemical Engineering

Professor of Clean Energy
 
 
 
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Contact

 

+44 (0)20 7594 6637p.fennell

 
 
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Location

 

228aBone BuildingSouth Kensington Campus

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Summary

 

Publications

Publication Type
Year
to

107 results found

Fennell PS, yao JG, maitland GC, Zhang Zet al., Pressurized Calcium Looping in the Presence of Steam in a Spout-Fluidized-Bed Reactor with DFT Analysis, Fuel Processing Technology, ISSN: 0378-3820

JOURNAL ARTICLE

Yao JG, fennell PS, Maitland GC, zhang Z, sceats Met al., Two-Phase Fluidized Bed Model for Pressurized Carbonation Kinetics of Calcium Oxide, Energy and Fuels, ISSN: 0887-0624

A two-phase reactor model has been developed using a system of ordinary differential equations in MATLAB to model the carbonation reaction and therefore determine the kinetics of calcium oxide in a pressurised fluidised bed reactor as part of the calcium looping cycle. The model assumes that the particulate and bubble phases are modelled as a CSTR and a PFR respectively. The random pore model developed by Bhatia and Perlmutter1 is incorporated into the system of equations to predict the rate of carbonation for pressures up to 5 bara total, and CO2 partial pressures up to 150 kPa. The surface rate constant and product layer diffusivity in the random pore model expression were obtained by fitting the model to experimental data for a range of pressures, CO2 concentrations and temperatures by minimization of the resid-ual sum of squares. The surface rate constants were found to be between 3.05 and 12.9 x 10-10 m4 mol-1 s-1 for a temper-ature range of 550 to 750 °C. The product layer diffusivities were found to be between 0.06 and 23.6 x 10-13 m2 s-1 for the same temperature range. The surface rate constant and product layer diffusivity activation energy were calculated using the Arrhenius e

JOURNAL ARTICLE

Zeng D, Patzschke C, Fennell P, Xiao R, Song Qet al., Nanostructured Iron-based Mixed Metal Oxides for Efficient H2 Production via Thermochemical Water Splitting, 13th International Conference on Materials Chemistry (MC13)

CONFERENCE PAPER

Bhave A, Taylor RHS, Fennell P, Livingston WR, Shah N, Mac Dowell N, Dennis J, Kraft M, Pourkashanian M, Insa M, Jones J, Burdett N, Bauen A, Beal C, Smallbone A, Akroyd Jet al., 2017, Screening and techno-economic assessment of biomass-based power generation with CCS technologies to meet 2050 CO2 targets, APPLIED ENERGY, Vol: 190, Pages: 481-489, ISSN: 0306-2619

JOURNAL ARTICLE

Bond T, Tse Q, Chambon CL, Fennell P, Fowler GD, Templeton MRet al., 2017, Retracted Article: The feasibility of char and bio-oil production from pyrolysis of pit latrine sludge, Environ. Sci.: Water Res. Technol., ISSN: 2053-1400

JOURNAL ARTICLE

Brandl P, Soltani SM, Fennell PS, Mac Dowell Net al., 2017, Evaluation of cooling requirements of post-combustion CO2 capture applied to coal-fired power plants, CHEMICAL ENGINEERING RESEARCH & DESIGN, Vol: 122, Pages: 1-10, ISSN: 0263-8762

JOURNAL ARTICLE

Brandt-Talbot A, Gschwend FJV, Fennell PS, Lammens TM, Tan B, Weale J, Hallett JPet al., 2017, An economically viable ionic liquid for the fractionation of lignocellulosic biomass, GREEN CHEMISTRY, Vol: 19, Pages: 3078-3102, ISSN: 1463-9262

JOURNAL ARTICLE

Leeson D, Fennell P, Mac Dowell N, Shah Net al., 2017, Simultaneous design of separation sequences and whole process energy integration, Chemical Engineering Research and Design, Vol: 125, Pages: 166-180, ISSN: 0263-8762

© 2017 Institution of Chemical Engineers This paper presents a novel methodology for the optimisation of the preliminary design of heat-integrated multicomponent distillation sequences. This is achieved through use of a reduced process superstructure where the role of splitting each adjacent key component pair is assigned to an individual separation column, greatly reducing the size and complexity of the problem. This methodology uses information about other process streams on site with which heat can be exchanged within the initial design in order to find a plant-wide optimal separation configuration with the aim of reducing the cost of heating provided by utilities including those used for heating and cooling process streams. In order that this model can be formulated as a mixed-integer linear program, this model utilises a discretised temperature grid where stream temperatures are allowed to vary. This methodology was tested on an example of a mixed alkane feed stream, with the sequence changing dependent on the degree of process integration. The method was found to have the potential for significant cost reductions compared to a heuristic design, with the example exhibiting a cost saving of over 50% and a reduction in CO 2 associated with process heating of almost 60%, though the magnitude of these savings is highly dependent on the specific example to which it is applied.

JOURNAL ARTICLE

Leeson D, Mac Dowell N, Shah N, Petit C, Fennell PSet al., 2017, A Techno-economic analysis and systematic review of carbon capture and storage (CCS) applied to the iron and steel, cement, oil refining and pulp and paper industries, as well as other high purity sources, INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL, Vol: 61, Pages: 71-84, ISSN: 1750-5836

JOURNAL ARTICLE

Mac Dowell N, Fennell PS, Shah N, Maitland GCet al., 2017, The role of CO2 capture and utilization in mitigating climate change, NATURE CLIMATE CHANGE, Vol: 7, Pages: 243-249, ISSN: 1758-678X

JOURNAL ARTICLE

Mechleri E, Brown S, Fennell PS, Mac Dowell Net al., 2017, CO2 capture and storage (CCS) cost reduction via infrastructure right-sizing, CHEMICAL ENGINEERING RESEARCH & DESIGN, Vol: 119, Pages: 130-139, ISSN: 0263-8762

JOURNAL ARTICLE

Mechleri E, Fennell PS, Dowell NM, 2017, Flexible Operation Strategies for Coal- and gas-CCS Power Stations under the UK and USA Markets, Pages: 6543-6551, ISSN: 1876-6102

© 2017 The Authors. The increased penetration of the intermittent renewable energy has increased the demand for flexible electricity supply. In this work, we evaluate four distinct strategies for flexible operation of CCS power plants: load following, solvent storage, exhaust gas by-pass and variable solvent regeneration (VSR) for coal- and gas-CCS power stations. With the aim to decoupling the power and capture plants in order to maximize profits, a multi-period dynamic optimisation problem was formulated and solved in the context of UK- and US-type markets. It was found that whilst the flexible operation strategies are strongly affected by the different markets, in all cases the variable solvent regeneration strategy was found to be the most profitable.

CONFERENCE PAPER

Mechleri E, Fennell PS, Mac Dowell N, 2017, Optimisation and evaluation of flexible operation strategies for coal- and gas-CCS power stations with a multi-period design approach, INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL, Vol: 59, Pages: 24-39, ISSN: 1750-5836

JOURNAL ARTICLE

Patzschke CF, Zhang J, Fennell PS, Trusler JPMet al., 2017, Density and Viscosity of Partially Carbonated Aqueous Solutions Containing a Tertiary Alkanolamine and Piperazine at Temperatures between 298.15 and 353.15 K, JOURNAL OF CHEMICAL AND ENGINEERING DATA, Vol: 62, Pages: 2075-2083, ISSN: 0021-9568

JOURNAL ARTICLE

Sikarwar VS, Zhao M, Fennell PS, Shah N, Anthony EJet al., 2017, Progress in biofuel production from gasification, PROGRESS IN ENERGY AND COMBUSTION SCIENCE, Vol: 61, Pages: 189-248, ISSN: 0360-1285

JOURNAL ARTICLE

Zhao X, Zhou H, Sikarwar VS, Zhao M, Park A-HA, Fennell PS, Shen L, Fan L-Set al., 2017, Biomass-based chemical looping technologies: the good, the bad and the future, ENERGY & ENVIRONMENTAL SCIENCE, Vol: 10, Pages: 1885-1910, ISSN: 1754-5692

JOURNAL ARTICLE

Blamey J, Al-Jeboori MJ, Manovic V, Fennell PS, Anthony EJet al., 2016, CO2 capture by calcium aluminate pellets in a small fluidized bed, FUEL PROCESSING TECHNOLOGY, Vol: 142, Pages: 100-106, ISSN: 0378-3820

JOURNAL ARTICLE

Blarney J, Zhao M, Manovic V, Anthony EJ, Dugwell DR, Fennell PSet al., 2016, A shrinking core model for steam hydration of CaO-based sorbents cycled for CO2 capture, CHEMICAL ENGINEERING JOURNAL, Vol: 291, Pages: 298-305, ISSN: 1385-8947

JOURNAL ARTICLE

Boot-Handford ME, Florin N, Fennell PS, 2016, Investigations into the effects of volatile biomass tar on the performance of Fe-based CLC oxygen carrier materials, ENVIRONMENTAL RESEARCH LETTERS, Vol: 11, ISSN: 1748-9326

JOURNAL ARTICLE

Clough PT, Boot-Handford ME, Zhao M, Fennell PSet al., 2016, Degradation study of a novel polymorphic sorbent under realistic post-combustion conditions, FUEL, Vol: 186, Pages: 708-713, ISSN: 0016-2361

JOURNAL ARTICLE

Gonzalez B, Blamey J, Al-Jeboori MJ, Florin NH, Clough PT, Fennell PSet al., 2016, Additive effects of steam addition and HBr doping for CaO-based sorbents for CO2 capture, CHEMICAL ENGINEERING AND PROCESSING, Vol: 103, Pages: 21-26, ISSN: 0255-2701

JOURNAL ARTICLE

Hills T, Florin N, Fennell PS, 2016, Decarbonising the cement sector: A bottom-up model for optimising carbon capture application in the UK, JOURNAL OF CLEANER PRODUCTION, Vol: 139, Pages: 1351-1361, ISSN: 0959-6526

JOURNAL ARTICLE

Hills T, Leeson D, Florin N, Fennell Pet al., 2016, Carbon Capture in the Cement Industry: Technologies, Progress, and Retrofitting, ENVIRONMENTAL SCIENCE & TECHNOLOGY, Vol: 50, Pages: 368-377, ISSN: 0013-936X

JOURNAL ARTICLE

Lee J-SM, Rochelle G, Styring P, Fennell P, Wilson G, Trusler M, Clough P, Blamey J, Dunstan M, MacDowell N, Lyth S, Yao J, Hills T, Gazzani M, Brandl P, Anantharaman R, Brandani S, Stolaroff J, Mazzotti M, Maitland G, Muller C, Dowson G, Gibbins J, Ocone R, Campbell KS, Erans M, Zheng L, Sutter D, Armutlulu A, Smit Bet al., 2016, CCS - A technology for now: general discussion, FARADAY DISCUSSIONS, Vol: 192, Pages: 125-151, ISSN: 1359-6640

JOURNAL ARTICLE

Sikarwar VS, Zhao M, Clough P, Yao J, Zhong X, Memon MZ, Shah N, Anthony EJ, Fennell PSet al., 2016, An overview of advances in biomass gasification, ENERGY & ENVIRONMENTAL SCIENCE, Vol: 9, Pages: 2939-2977, ISSN: 1754-5692

JOURNAL ARTICLE

Smit B, Graham R, Styring P, Yao J, Clough P, Lee J-SM, MacDowell N, Lyth S, Rochelle G, Hills T, Wilson G, Petit C, Kemper J, Cuellar-Franca R, Dowson G, Gazzani M, Fennell P, Sutter D, Scholes C, Azapagic A, Bell R, Gibbins J, Mazzotti M, Maitland G, Brandani S, Ocone R, Mota-Martinez M, Dunstan M, Liang P, Anantharaman R, Joss L, Stolaroff Jet al., 2016, CCS - A technology for the future: general discussion, FARADAY DISCUSSIONS, Vol: 192, Pages: 303-335, ISSN: 1359-6640

JOURNAL ARTICLE

Smit B, Styring P, Wilson G, Rochelle G, Donat F, Yao J, Trusler M, Adjiman C, Lyth S, Lee J-SM, Hills T, Brandl P, Gazzani M, Cuellar-Franca R, Fennell P, Sutter D, Bui M, Scholes C, Dowson G, Gibbins J, Joss L, Maitland G, Brandani S, Garcia-Gutierrez P, Zhang Y, Muller C, Jackson G, Ocone R, Joos L, Bell R, Graham Ret al., 2016, Modelling - from molecules to megascale: general discussion, FARADAY DISCUSSIONS, Vol: 192, Pages: 493-509, ISSN: 1359-6640

JOURNAL ARTICLE

Wilson G, Trusler M, Yao J, Lee J-SM, Graham R, Mac Dowell N, Cuellar-Franca R, Dowson G, Fennell P, Styring P, Gibbins J, Mazzotti M, Brandani S, Muller C, Hubble Ret al., 2016, End use and disposal of CO2 - storage or utilisation?: general discussion, FARADAY DISCUSSIONS, Vol: 192, Pages: 561-579, ISSN: 1359-6640

JOURNAL ARTICLE

Zhang Z, Hills TP, Scott SA, Fennell PSet al., 2016, Spouted bed reactor for kinetic measurements of reduction of Fe2O3 in a CO2/CO atmosphere Part I: Atmospheric pressure measurements and equipment commissioning, CHEMICAL ENGINEERING RESEARCH & DESIGN, Vol: 114, Pages: 307-320, ISSN: 0263-8762

JOURNAL ARTICLE

Zheng L, Hills TP, Fennell P, 2016, Phase evolution, characterisation, and performance of cement prepared in an oxy-fuel atmosphere, FARADAY DISCUSSIONS, Vol: 192, Pages: 113-124, ISSN: 1359-6640

JOURNAL ARTICLE

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