2004
DOI: 10.1016/j.fuel.2003.11.017
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Oxidation behavior of biomass chars: pectin and Populus deltoides

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Cited by 22 publications
(7 citation statements)
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References 9 publications
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“…22 This finding, along with the low degree of esterification (lemon IntegroPectin is a low-methoxyl citrus pectin with DE = 27%) 17 explains also the significantly larger solubility in water of the IntegroPectin at room temperature when compared to the poorly soluble commercial citrus pectin, extracted via conventional hydrolysis in hot acidic water, having DE = 70%. In agreement to previous results, 25,26 the TGA profiles (Figure 6) are similar showing three regions at 50-200 °C, 200-400 °C and 400-600 °C. The first step corresponds to loss of water 0,85 Likewise to what happens with grapefruit pectin obtained via acoustic cavitation, 26 the water content of the commercial citrus pectin is higher than that in lemon IntegroPectin, with a 39.10% weight loss in the latter compared to 41.80% in the conventional pectin.…”
Section: Resultssupporting
confidence: 93%
See 1 more Smart Citation
“…22 This finding, along with the low degree of esterification (lemon IntegroPectin is a low-methoxyl citrus pectin with DE = 27%) 17 explains also the significantly larger solubility in water of the IntegroPectin at room temperature when compared to the poorly soluble commercial citrus pectin, extracted via conventional hydrolysis in hot acidic water, having DE = 70%. In agreement to previous results, 25,26 the TGA profiles (Figure 6) are similar showing three regions at 50-200 °C, 200-400 °C and 400-600 °C. The first step corresponds to loss of water 0,85 Likewise to what happens with grapefruit pectin obtained via acoustic cavitation, 26 the water content of the commercial citrus pectin is higher than that in lemon IntegroPectin, with a 39.10% weight loss in the latter compared to 41.80% in the conventional pectin.…”
Section: Resultssupporting
confidence: 93%
“…The second step between 200 and 400 °C corresponding to the polysaccharide pyrolitic decomposition consisting in a primary and secondary decarboxylation (involving the acid side group and a carbon in the ring), 25 and further water loss due to cleavage of hydroxyl groups in pectin lateral chains, 28 takes place at slower pace for lemon IntegroPectin. The higher mass loss for lemon IntegroPectin (43.50%) compared to commercial citrus pectin (39.05%) in this region is due to loss of adsorbed terpenes 27 and flavonoids 18 present in the former whole pectin, but not in commercial pectin highly purified after precipitation with alcohol.…”
Section: Resultsmentioning
confidence: 99%
“…The AAEM also form silicates in the presence of high amounts of silicate minerals [96]. This ash prevents further diffusion of gases into the biochar at higher temperatures where the reaction is mainly driven by diffusion or mass transfer [97,98]. Inherited from AD, 650D can retain higher chlorine concentration in it.…”
Section: Biochar From the Individual Unmixed Substratesmentioning
confidence: 99%
“…Παρ' όλα αυτά, ψύχοντας τους άνθρακες αυτούς µε αέρα, αλλάζει το zeta δυναµικό σε αρνητική τιµή λόγω του σχηµατισµού οξικές επιφάνειες οξειδίων.Παραδείγµατα παραγωγής ενεργού άνθρακα από βιοµάζα υπάρχουν πολλά τόσο µε φυσική ενεργοποίηση, όσο και µε χηµική. Οι Bacaoui et al[301], Yang and Lua[305], Chang et al[306], Lussier et al[307] είναι κάποιοι από τους ερευνητές που µελέτησαν τη φυσική ενεργοποίηση µε ατµό και διοξείδιο του άνθρακα, κυρίως σε υψηλές θερµοκρασίες (~800 o C).Επίσης, η TGA έχει χρησιµοποιηθεί και για την ενεργοποίηση εξανθρακώµατος από πολλούς ερευνητές[312][313][314][315][316]. Σύµφωνα µε τους Bhat et al[312] δύο µοντέλα χρησιµοποιήθηκαν κατά την αεριοποίηση εξανθρακώµατος µε ατµό και CO 2 , το οµοιογενές (homogeneous) και το συρρικνωµένου πυρήνα (shrinking core).…”
unclassified
“…Σύµφωνα µε τους Bhat et al[312] δύο µοντέλα χρησιµοποιήθηκαν κατά την αεριοποίηση εξανθρακώµατος µε ατµό και CO 2 , το οµοιογενές (homogeneous) και το συρρικνωµένου πυρήνα (shrinking core). Στις µελέτες των Ollero et al[313,316] και Shim et al[314] ορίζεται η ενεργότητα του εξανθρακώµατος, η οποία αυξάνεται µε τη µετατροπή, και χρησιµοποιείται στην κινητική µελέτη. Στη µελέτη των Gomez et al[315] έχει γίνει η υπόθεση ψευδό-µόνιµης κατάστασης θεωρώντας µεταφορά µάζας αερίου και θερµότητας.…”
unclassified