37 resultados para BIOMASA DESOVANTE


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[eus] Gaur egungo erregai fosilen eskasiak eta hauek sortzen dituzten berotegi efektuko gasen emisio altuek bultzatu egin behar gaituzte energia iturri berriztagarriak erabiltzera. Biomasa, potentzial handiko energia iturria da eta ezinbestekoa izan da gizakiaren bizitzaren garapenerako. Energia berriztagarrien artean biomasa potentzial handiko lehengaia izanda bere erabilerak duen berebiziko garrantzia azpimarratu da lan honetan. Lehengai honetatik energia lortzeko tratamendu termokimiko ezberdinetatik pirolisi oxidatiboan lan egitea erabaki da. Sarrerako gas emariaren oxigenoak pirolisiaren ondoren partikularen gainazalean geratu den ikatzaren errekuntza ematerakoan, biomasaren konbertsioa bere osotasunean ematea lortuko duelako. Baita instalazioak behar duen bezain beste beroa hornitu ahal izango duelako ere. Modu honetan, pirolisi oxidatiboa inertea baino interesgarriagoa bihurtu delarik industria mailan garrantzi handia lortu du.

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[ES] Estudio de la pírolisis rápida de biomasa y reformado catalítico en línea para la producción de hidrógeno. Se estudia el efecto de la desactivacion del catalizador en la conversión de la reacción y en el rendimiento de los productos. Analisis y caracterización del catalizador desactivado.

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[EN] The intense industrial activity that took place over the past century resulted in large contaminated áreas. This is an important risk to human health and environmental safety. Recent biotechnological techniques for bioremediation include phytoremediation, which uses plants to remove or stabilize contaminants in soils. In our study we choose birch (Betula alba) as the preferred species to remedy mining soils, due to it produces a large biomass and can accumulate high levels of toxic elements in its tissues. The aim of this study was (i) to determine the possibility of using this species in reforestation and/or remediation of mining soils (ii) to elucidate the potential of tocopherol levels as indicators of heavy metal pollution. Trees growing in mining soils with high concentrations of Zn, Cd and Pb were sampled and the metal content in various organs and in tree rings was analyzed. α-tocoferol levels were also analyzed as an indicator of stress. The results showed a different distribution of metals in plant tissues. Zn and Cd had a higher accumulation in leaves, whereas Pb was stored in the timber. In addition, the metal content in tree rings was higher in older rings, leading to a conclusion that older tissues present a detoxification strategy. Furthermore, we saw how the presence of α- tocoferol on branches can be an indicator of metal stress in plants and it can be also used as a monitoring factor.

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Gradu Amaierako Lan honekin hidrogenoaren ekoizpena ikertu nahi da, biomasaren pirolisi eta jarraian buruturiko lurrun bidezko hegazkorren erreformatze bidez. Helburu nagusia biomasaren pirolisiko produktuen erreformatzearen operazio baldintzak optimizatzea da nikelezko katalizatzaile komertzial bat erabiliz, eta horretarako: Tenperaturak erreformatuko produktuetan duen eragina aztertzea; Erreformatze etaparako denbora espazial optimoa zein den aztertzea; eta Ur/biomasa erlazioak erreformatuko produktuetan duen eragina aztertzea.

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133 p.