Influence of feedwater pH on the CO2 reactivity of hydrochars. Co-carbonisation with a bituminous coal
Hydrothermal carbonisation (HTC) is recognised as an environmentally advantageous method to pre-treat biomass feedstocks. This study examined the hydrothermal carbonisation of two lignocellulosic biomasses at different pH levels. Lower pH promoted hydrolysis, dehydration and decarboxylation reactions, which led to more condensed and aromatic structures of hydrochars. These observations were confirmed by means of elemental analysis and diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS). The initial pH also had a strong influence on the ash chemistry of the hydrochars. Lower pH promoted the removal of alkali and alkaline earth metals from the biomass. This was reflected in a decrease in the reactivity of bio-cokes produced from hydrochars compared with those obtained from untreated biomass. Based on these findings, the possibility of adding 20 wt% of hydrochar samples to a low volatile bituminous coal was studied. A significant decrease in the reactivity of the resulting bio-cokes compared to the values obtained for the same blends with raw biomass was observed (37% and 20% for PS and RH hydrochars, respectively).
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Format: | artículo biblioteca |
Language: | English |
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Elsevier
2021-02-02
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Subjects: | Biomass, Hydrothermal carbonisation, Feedwater pH, Bio-coke, |
Online Access: | http://hdl.handle.net/10261/240244 http://dx.doi.org/10.13039/100011941 |
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dig-incar-es-10261-2402442023-02-03T05:30:18Z Influence of feedwater pH on the CO2 reactivity of hydrochars. Co-carbonisation with a bituminous coal Vega González, María Fernanda Florentino Madiedo, Laura Díaz-Faes González, Elvira Barriocanal Rueda, Carmen Principado de Asturias Vega González, María Fernanda [0000-0002-5694-513X] Barriocanal Rueda, Carmen [0000-0001-5156-0970] Biomass Hydrothermal carbonisation Feedwater pH Bio-coke Hydrothermal carbonisation (HTC) is recognised as an environmentally advantageous method to pre-treat biomass feedstocks. This study examined the hydrothermal carbonisation of two lignocellulosic biomasses at different pH levels. Lower pH promoted hydrolysis, dehydration and decarboxylation reactions, which led to more condensed and aromatic structures of hydrochars. These observations were confirmed by means of elemental analysis and diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS). The initial pH also had a strong influence on the ash chemistry of the hydrochars. Lower pH promoted the removal of alkali and alkaline earth metals from the biomass. This was reflected in a decrease in the reactivity of bio-cokes produced from hydrochars compared with those obtained from untreated biomass. Based on these findings, the possibility of adding 20 wt% of hydrochar samples to a low volatile bituminous coal was studied. A significant decrease in the reactivity of the resulting bio-cokes compared to the values obtained for the same blends with raw biomass was observed (37% and 20% for PS and RH hydrochars, respectively). The research leading to these results has received funding from FICYT Regional Project. Peer reviewed 2021-05-10T07:20:12Z 2021-05-10T07:20:12Z 2021-02-02 artículo http://purl.org/coar/resource_type/c_6501 Renewable Energy 170: 824-831 (2021) 0960-1481 http://hdl.handle.net/10261/240244 10.1016/j.renene.2021.01.100 http://dx.doi.org/10.13039/100011941 en Postprint https://doi.org/10.1016/j.renene.2021.01.100 Sí open Elsevier |
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Biomass Hydrothermal carbonisation Feedwater pH Bio-coke Biomass Hydrothermal carbonisation Feedwater pH Bio-coke |
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Biomass Hydrothermal carbonisation Feedwater pH Bio-coke Biomass Hydrothermal carbonisation Feedwater pH Bio-coke Vega González, María Fernanda Florentino Madiedo, Laura Díaz-Faes González, Elvira Barriocanal Rueda, Carmen Influence of feedwater pH on the CO2 reactivity of hydrochars. Co-carbonisation with a bituminous coal |
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Hydrothermal carbonisation (HTC) is recognised as an environmentally advantageous method to pre-treat biomass feedstocks. This study examined the hydrothermal carbonisation of two lignocellulosic biomasses at different pH levels. Lower pH promoted hydrolysis, dehydration and decarboxylation reactions, which led to more condensed and aromatic structures of hydrochars. These observations were confirmed by means of elemental analysis and diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS). The initial pH also had a strong influence on the ash chemistry of the hydrochars. Lower pH promoted the removal of alkali and alkaline earth metals from the biomass. This was reflected in a decrease in the reactivity of bio-cokes produced from hydrochars compared with those obtained from untreated biomass. Based on these findings, the possibility of adding 20 wt% of hydrochar samples to a low volatile bituminous coal was studied. A significant decrease in the reactivity of the resulting bio-cokes compared to the values obtained for the same blends with raw biomass was observed (37% and 20% for PS and RH hydrochars, respectively). |
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Principado de Asturias |
author_facet |
Principado de Asturias Vega González, María Fernanda Florentino Madiedo, Laura Díaz-Faes González, Elvira Barriocanal Rueda, Carmen |
format |
artículo |
topic_facet |
Biomass Hydrothermal carbonisation Feedwater pH Bio-coke |
author |
Vega González, María Fernanda Florentino Madiedo, Laura Díaz-Faes González, Elvira Barriocanal Rueda, Carmen |
author_sort |
Vega González, María Fernanda |
title |
Influence of feedwater pH on the CO2 reactivity of hydrochars. Co-carbonisation with a bituminous coal |
title_short |
Influence of feedwater pH on the CO2 reactivity of hydrochars. Co-carbonisation with a bituminous coal |
title_full |
Influence of feedwater pH on the CO2 reactivity of hydrochars. Co-carbonisation with a bituminous coal |
title_fullStr |
Influence of feedwater pH on the CO2 reactivity of hydrochars. Co-carbonisation with a bituminous coal |
title_full_unstemmed |
Influence of feedwater pH on the CO2 reactivity of hydrochars. Co-carbonisation with a bituminous coal |
title_sort |
influence of feedwater ph on the co2 reactivity of hydrochars. co-carbonisation with a bituminous coal |
publisher |
Elsevier |
publishDate |
2021-02-02 |
url |
http://hdl.handle.net/10261/240244 http://dx.doi.org/10.13039/100011941 |
work_keys_str_mv |
AT vegagonzalezmariafernanda influenceoffeedwaterphontheco2reactivityofhydrocharscocarbonisationwithabituminouscoal AT florentinomadiedolaura influenceoffeedwaterphontheco2reactivityofhydrocharscocarbonisationwithabituminouscoal AT diazfaesgonzalezelvira influenceoffeedwaterphontheco2reactivityofhydrocharscocarbonisationwithabituminouscoal AT barriocanalruedacarmen influenceoffeedwaterphontheco2reactivityofhydrocharscocarbonisationwithabituminouscoal |
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1777669069977157632 |