Publications
131 results found
Paterson N, Nyako F, Millan M, et al., 2010, TAR FORMATION AND DESTRUCTION IN A FIXED BED REACTOR SIMULATING DOWNDRAFT GASIFICATION: EQUIPMENT DEVELOPMENT & CHARACTERIZATION OF TAR CRACKING PRODUCTS, Energy and Fuels (accepted)
Morgan TJ, George A, Alvarez-Rodriguez P, et al., 2010, Estimating molecular masses of petroleum-derived fractions: High mass (>2000 u) materials in maltenes and asphaltenes from Maya crude oil, JOURNAL OF CHROMATOGRAPHY A, Vol: 1217, Pages: 3804-3818, ISSN: 0021-9673
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- Citations: 26
Mermelstein J, Millan M, Brandon N, 2010, The impact of steam and current density on carbon formation from biomass gasification tar on Ni/YSZ, and Ni/CGO solid oxide fuel cell anodes, Journal Power Sources, Vol: 195, Pages: 1657-1666
Apicella B, Alfè M, Millan M, et al., 2010, Separative and mass spectrometric techniques in the diagnostics of soot precursors, Pages: 209-214, ISSN: 2283-9216
Carbonaceous particulate matter formed in combustion systems can be operationally separated in two phases on the basis of its solubility in dichloromethane (DCM). The DCM soluble fraction, named soot extract, is a tarry phase composed of polycyclic aromatic hydrocarbons and a higher molecular weight fraction whose composition and structure is still unknown. In this work separation techniques have been used in combination with mass spectrometry in order to clarify the structure of the larger soot extract fractions. Copyright © 2010, AIDIC Servizi S.r.l.
Morgan TJ, George A, Alvarez P, et al., 2009, Isolation of Size Exclusion Chromatography Elution-Fractions of Coal and Petroleum-Derived Samples and Analysis by Laser Desorption Mass Spectrometry, ENERGY & FUELS, Vol: 23, Pages: 6003-6014, ISSN: 0887-0624
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- Citations: 31
Mermelstein J, Brandon N, Millan M, 2009, Impact of Steam on the Interaction between Biomass Gasification Tars and Nickel-Based Solid Oxide Fuel Cell Anode Materials, ENERGY & FUELS, Vol: 23, Pages: 5042-5048, ISSN: 0887-0624
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- Citations: 29
Morgan T, Alvarez GP, Millan M, et al., 2009, Characterization of Maya crude oil in terms of structural features and mass distribution estimates, Publisher: AMER CHEMICAL SOC, ISSN: 0065-7727
Alvarez P, Morgan T, George A, et al., 2009, NMR characterization of an Athabasca bitumen, Publisher: AMER CHEMICAL SOC, ISSN: 0065-7727
George A, Morgan T, Alvarez P, et al., 2009, Isolation and analysis of size exclusion chromatography elution-fractions of coal and petroleum-derived materials by laser desorption mass spectrometer, Publisher: AMER CHEMICAL SOC, ISSN: 0065-7727
Karaca F, Morgan TJ, George A, et al., 2009, Molecular mass ranges of coal tar pitch fractions by mass spectrometry and size-exclusion chromatography, RAPID COMMUNICATIONS IN MASS SPECTROMETRY, Vol: 23, Pages: 2087-2098, ISSN: 0951-4198
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- Citations: 31
Berrueco C, Alvarez P, Venditti S, et al., 2009, Sample Contamination with NMP-oxidation Products and Byproduct-free NMP Removal from Sample Solutions, ENERGY & FUELS, Vol: 23, Pages: 3008-3015, ISSN: 0887-0624
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- Citations: 46
Herod AA, Morgan TJ, Alvarez P, et al., 2009, Analysis of Maya crude oil, Publisher: AMER CHEMICAL SOC, ISSN: 0065-7727
Herod AA, Alvarez P, Berrueco C, et al., 2009, Syncrude characterization, Publisher: AMER CHEMICAL SOC, ISSN: 0065-7727
Mermelstein J, Millan M, Brandon NP, 2009, The impact of carbon formation on Ni-YSZ anodes from biomass gasification model tars operating in dry conditions, CHEMICAL ENGINEERING SCIENCE, Vol: 64, Pages: 492-500, ISSN: 0009-2509
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- Citations: 63
Mermelstein J, Millan-Agorio M, Brandon NP, 2009, The impact and mitigation of carbon formation on Ni-YSZ anodes from biomass gasification tars, Pages: 111-117, ISSN: 1938-5862
The combination of Solid Oxide Fuel Cells (SOFCs) and biomass gasification has the potential to become an attractive technology for the production of clean renewable energy. However the impact of tars, formed during biomass gasification, on the performance and durability of SOFC anodes has not been well established experimentally. This paper reports on an experimental study assessment of the performance and mitigation of carbon formation on the anodes of SOFC button cells from synthetic model tars arising from the gasification of biomass material. The anode material was a 60:40 wt.% NiO/YSZ cermet, which was tested in a synthetically generated syngas containing a concentration of up to 15 g/Nm3 biomass gasification tars. It was found that carbon formation in dry conditions significantly damaged the anode of the fuel cell resulting in decreased cell performance and excessive anode polarization resistances. These effects were reduced by applying a load to the cell, and were essentially inhibited once the steam content of the input fuel was > 2%. © The Electrochemical Society.
Alvarez P, Granda M, Sutil J, et al., 2008, Characterization and Pyrolysis Behavior of Novel Anthracene Oil Derivatives, ENERGY & FUELS, Vol: 22, Pages: 4077-4086, ISSN: 0887-0624
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- Citations: 26
Morgan TJ, George A, Alvarez P, et al., 2008, Characterization of molecular mass ranges of two coal tar distillate fractions (creosote and anthracene oils) and aromatic standards by LD-MS, GC-MS, probe-MS and size-exclusion chromatography, ENERGY & FUELS, Vol: 22, Pages: 3275-3292, ISSN: 0887-0624
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- Citations: 56
Berrueco C, Venditti S, Morgan TJ, et al., 2008, Calibration of size-exclusion chromatography columns with 1-methyl-2-pyrrolidinone (NMP)/chloroform mixtures as eluent: Applications to petroleum-derived samples, ENERGY & FUELS, Vol: 22, Pages: 3265-3274, ISSN: 0887-0624
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- Citations: 43
Millan M, Adell C, Hinojosa C, et al., 2008, Mechanisms of catalytic activity in heavily coated hydrocracking catalysts, OIL & GAS SCIENCE AND TECHNOLOGY-REVUE D IFP ENERGIES NOUVELLES, Vol: 63, Pages: 69-78, ISSN: 1294-4475
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- Citations: 11
Herod AA, Karaca F, Millan-Agorio M, et al., 2007, Comparison of solvent-soluble fractions of a petroleum residue and three coal tars by size exclusion chromatography (SEC), UV-fluorescence (UV-F) and mass spectrometry., Pages: 1462-1476
A petroleum atmospheric pressure distillate residue and three tars derived from coals using different severities of thermal treatment (a high temperature coal tar pitch, a coal liquefaction extract and a low temperature tar) have been fractionated using column chromatography on silica and seven solvent elutions. The fractions from the four extractions have been compared using SEC in 1-methyl-2- pyrrolidinone (NMP) as eluent and by synchronous UV-fluorescence (UV-F). Fractionation solvents were pentane (2 x 50 mL), toluene (100 mL), acetonitrile (100 mL), pyridine (100 mL), NMP (100 mL) and water (100 mL) using 1g of each sample. The two pentane-soluble fractions of 50 ml each from each sample eluted different components, with the second aliquot containing larger size aromatics than the first; the toluene-soluble fractions were of larger size by SEC, than the pentane soluble fractions. The toluene-soluble fraction from Petrox was of larger size than those from coal tars, but the three coal tars showed significant differences, indicating that temperature of pyrolysis had a significant effect on the molecular size. Synchronous UV-F spectra of the fractions in solution in NMP showed significant differences between the petroleum residue and the coal tars. The toluene solubles of petroleum residues and coal tars have molecular sizes by SEC, and aromatic chromophores by UV-F, that depend in part on the thermal treatment experienced in the formation of the tar or liquid. Coal tars are generally prepared using higher pyrolysis temperatures than those envisaged in the generation of petroleum crudes from kerogen. Fractions soluble in toluene approximate to asphaltenes, but it is clear that there are fractions dissolved from coal tars and Petrox residue that require more polar solvents than toluene.
Paul-Dauphin S, Karaca F, Morgan TJ, et al., 2007, Probing size exclusion mechanisms of complex hydrocarbon mixtures: The effect of altering eluent compositions, ENERGY & FUELS, Vol: 21, Pages: 3484-3489, ISSN: 0887-0624
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- Citations: 39
Seneviratne HR, Charpenteau C, George A, et al., 2007, Ranking low cost sorbents for mercury capture from simulated flue gases, ENERGY & FUELS, Vol: 21, Pages: 3249-3258, ISSN: 0887-0624
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- Citations: 20
Karaca F, Millan-Agorio M, Morgan TJ, et al., 2007, The pentane- and toluene-soluble fractions of a petroleum residue and three coal tars by size exclusion chromatography and UV-fluorescence spectroscopy, International Conference on Molecular Structure of Heavy Oils and Coal Liquefaction Products, Publisher: EDP SCIENCES S A, Pages: 129-137, ISSN: 1294-4475
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- Citations: 10
Charpenteau C, Seneviratne R, George A, et al., 2007, Screening of low cost sorbents for arsenic and mercury capture in gasification systems, ENERGY & FUELS, Vol: 21, Pages: 2746-2750, ISSN: 0887-0624
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- Citations: 21
Millan M, Adell C, Hinojosa C, et al., 2007, Effect of catalyst deactivation and reaction time on hydrocracking heavy hydrocarbon liquids, ENERGY & FUELS, Vol: 21, Pages: 1370-1378, ISSN: 0887-0624
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- Citations: 22
Hamilton JF, Lewis AC, Millan M, et al., 2006, Comprehensive two-dimensional gas chromatography coupled to time-of-flight mass spectrometry of coal liquids produced during a coal liquefaction process, ENERGY & FUELS, Vol: 21, Pages: 286-294, ISSN: 0887-0624
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- Citations: 44
Apicella B, Millan M, Herod AA, et al., 2006, Separation and measurement of flame-formed high molecular weight polycyclic aromatic hydrocarbons by size-exclusion chromatography and laser desorption/ionization time-of-flight mass spectrometry, Rapid Communications in Mass Spectrometry, Vol: 20, Pages: 1104-1108, ISSN: 0951-4198
Millan M, Behrouzi M, Karaca F, et al., 2005, Characterising high mass materials in heavy oil fractions by size exclusion chromatography and MALDI-mass spectrometry, CATALYSIS TODAY, Vol: 109, Pages: 154-161, ISSN: 0920-5861
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- Citations: 36
Karaca F, Millan M, Behrouzi M, et al., 2005, The size exclusion chromatography calibration of 'Mixed-A' and 'Mixed-D' columns using various polymers and compounds: An application to coal-derived materials, 4th Aegean Analytical Chemistry Days Congress, Publisher: ELSEVIER SCIENCE BV, Pages: 78-82, ISSN: 0003-2670
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- Citations: 4
Gyftopoulou ME, Millan M, Bridgwater AV, et al., 2005, Pillared clays as catalysts for hydrocracking of heavy liquid fuels, APPLIED CATALYSIS A-GENERAL, Vol: 282, Pages: 205-214, ISSN: 0926-860X
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- Citations: 39
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