Noemí Gil-Lalaguna

@article{Garcia2017,

title = {Antioxidants for biodiesel: Additives prepared from extracted fractions of bio-oil},

author = {Manuel García and Lucía Botella and Noemí Gil-Lalaguna and Jesús Arauzo and Alberto Gonzalo and José Luis Sánchez},

doi = {10.1016/j.fuproc.2016.10.001},

issn = {03783820},

year  = {2017},

date = {2017-02-01},

journal = {Fuel Processing Technology},

volume = {156},

pages = {407--414},

publisher = {Elsevier B.V.},

abstract = {Unlike petroleum diesel, the chemical structure of biodiesel makes it prone to oxidation during long-term storage, thus involving fuel quality deterioration. Therefore, the addition of antioxidants is usually required to meet the quality standards for biodiesel commercialization. Synthetic sterically-hindered phenols have been usually employed for this purpose as free radical scavenging antioxidants. However, naturally occurring phenolics are also available, for example, in the bio-oil produced in the pyrolysis of lignocellulosic biomass. In this work, the antioxidant potential of extracted fractions of lignocellulosic bio-oil has been evaluated. Different organic solvents were tested as extraction agents, acetate esters being the best ones for incorporating bio-oil antioxidant compounds into biodiesel. In the best case, the incorporation of a small concentration of bio-oil compounds (< 4 wt.%) led to an improvement of the biodiesel oxidation stability of 475% which, in our case, was enough to meet the European standard requirement.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Gil-Lalaguna2015,

title = {Use of sewage sludge combustion ash and gasification ash for high-temperature desulphurization of different gas streams},

author = {Noemí Gil-Lalaguna and José Luis Sánchez and María Benita Murillo and Gloria Gea},

doi = {10.1016/j.fuel.2014.10.036},

issn = {00162361},

year  = {2015},

date = {2015-02-01},

journal = {Fuel},

volume = {141},

pages = {99--108},

publisher = {Elsevier Ltd},

abstract = {Due to its metal content, sewage sludge ash appears as a potential sorbent material for H2S removal at high temperature. The desulphurization ability of the solid by-products of combustion and gasification of sewage sludge has been evaluated in this work. Ash characterization results revealed that metal fraction in sewage sludge did not remained completely inert during combustion and gasification processes. Iron content was lower in the gasification ash and X-ray patterns showed different crystalline phases in the solids: Fe2O3 in the combustion ash and Fe3O4 in the gasification ash. These differences resulted in a lower sulphur capture capacity of the gasification ash. Desulphurization tests were carried out in a lab-scale fixed bed reactor operating at 600-800 °C. Different gases containing 5000 ppmv H2S (H2S/N2 mixture and synthetic gasification gas) were used. The H2S breakthrough curves were negatively affected by the reducing atmosphere created by the gasification gas and by the presence of steam in the reaction medium. However, H2S breakthrough curves alone do not provide enough information to evaluate the sulphur capture capacity of the sorbent materials. Ultimate analyses of the spent solid samples showed that the total amount of H2S removed from the gas was only partially captured in the ash. Thermodynamic data pointed to a significant fraction of sulphur forming part of other gases, such as SO2. In the best operating conditions, an outlet gas with less than 100 ppmv H2S was obtained during 300 min, thus resulting in a sulphur loading of 63 mg S gash-1. This experimental sulphur content was 39% lower than the maximum value predicted by equilibrium simulations.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Abrego2013,

title = {Technical and Energetic Assessment of a Three-Stage Thermochemical Treatment for Sewage Sludge},

author = {Javier Ábrego and José Luis Sánchez and Jesús Arauzo and Isabel Fonts and Noemí Gil-Lalaguna and María Atienza-Martínez},

url = {http://dx.doi.org/10.1021/ef3018095},

issn = {0887-0624},

year  = {2013},

date = {2013-02-01},

journal = {Energy & Fuels},

volume = {27},

number = {2},

pages = {1026--1034},

publisher = {American Chemical Society},

abstract = {A three-stage thermochemical process comprising torrefaction, pyrolysis, and char activation is proposed for the treatment of dry sewage sludge or biomass materials. To assess the feasibility of the process, lab-scale experiments were carried out with dried sewage sludge as feedstock, and mass and energy balances were calculated. In the process, 19.3% of the sewage sludge initial weight was transformed into a bio-oil with three distinct phases and reduced water content (66.1% of water content in the aqueous phase compared to 73.8% in a single-step fast pyrolysis). The product gases had a high H2S content but also enough heating value to be combusted. After being activated by the torrefaction vapors, the solid fraction (48.2% of the initial sludge weight) showed certain pore development and might be suitable for adsorption applications. Regarding the energy balance, it was found that the combustion of part of the product gas would provide the necessary heat to drive the process (1019 kJ/kg of dry sewage sludge). 

A three-stage thermochemical process comprising torrefaction, pyrolysis, and char activation is proposed for the treatment of dry sewage sludge or biomass materials. To assess the feasibility of the process, lab-scale experiments were carried out with dried sewage sludge as feedstock, and mass and energy balances were calculated. In the process, 19.3% of the sewage sludge initial weight was transformed into a bio-oil with three distinct phases and reduced water content (66.1% of water content in the aqueous phase compared to 73.8% in a single-step fast pyrolysis). The product gases had a high H2S content but also enough heating value to be combusted. After being activated by the torrefaction vapors, the solid fraction (48.2% of the initial sludge weight) showed certain pore development and might be suitable for adsorption applications. Regarding the energy balance, it was found that the combustion of part of the product gas would provide the necessary heat to drive the process (1019 kJ/kg of dry sewage sludge).},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Gil-Lalaguna2010,

title = {Reduction of water content in sewage sludge pyrolysis liquid by selective online condensation of the vapors},

author = {Noemí Gil-Lalaguna and Isabel Fonts and Gloria Gea and María Benita Murillo and Luisa Lázaro},

url = {https://pubs.acs.org/sharingguidelines},

doi = {10.1021/ef101024j},

issn = {08870624},

year  = {2010},

date = {2010-12-01},

journal = {Energy and Fuels},

volume = {24},

number = {12},

pages = {6555--6564},

publisher = {American Chemical Society},

abstract = {A selective online condensation system, including a scrubber and an electrostatic precipitator, has been tested in a lab-scale fluidized bed pyrolysis plant with the aim of reducing the water content of the pyrolysis liquid obtained from sewage sludge. Water and triethylene glycol at different temperatures were tested as washing liquids in the scrubber. The pyrolysis liquids collected with this liquid recovery system showed lower water contents (13-30 wt %) than those collected with a previous system (48 wt %) consisting of two condensers and an electrostatic precipitator. In spite of these significant reductions in the water contents, the liquids obtained still separated into three phases (light organic, heavy organic, and aqueous). The properties and yields of these phases were also affected by the operational conditions used in the scrubber. The aqueous phase was the most affected because the compounds present in this phase are those with greater affinity for the polar washing liquid used in the scrubber. The properties of the organic phases were less affected by the condensation system, although it is of interest that when using triethylene glycol at 80 °C as washing liquid, the yield to the light organic phase was increased by about 41% compared to the previous system without affecting its good properties as fuel. textcopyright 2010 American Chemical Society.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}