Catalyst loss and retention during alkali-catalysed carbon gasification in CO2

Meijer, Rudy; Weeda, M.; Kapteijn, Freek; Moulijn, Jacob A.

doi:10.1016/0008-6223(91)90171-e

Cited by 49 publications

(24 citation statements)

References 21 publications

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“…In this DFT model, soot structure was represented by graphene layers and potassium was modeled perpendicular to the plane of the soot model and near the zigzag and armchair edges of the soot. The DFT model for the C-C armchair face showed that the potassium intercalation in phenolate groups (C-O-K) inhibits the gasification reaction, confirming previous experimental observations [3,19].…”

Section: Introductionsupporting

confidence: 86%

Potassium and soot interaction in fast biomass pyrolysis at high temperatures

Trubetskaya

Larsen

Shchukarev

et al. 2018

Fuel

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Keyword:Soot Potassium Biomass Fast pyrolysis CO 2 reactivity A B S T R A C TThis study aims to investigate the interaction between potassium and carbonaceous matrix of soot produced from wood and herbaceous biomass pyrolysis at high heating rates at 1250°C in a drop tube reactor. The influence of soot carbon chemistry and potassium content in the original biomass on the CO 2 reactivity was studied by thermogravimetric analysis. The XPS results showed that potassium incorporation with oxygen-containing surface groups in the soot matrix did not occur during high temperature pyrolysis. The potassium was mostly found as water-soluble salts such as KCl, KOH, KHCO 3 and K 2 CO 3 in herbaceous biomass soot. The low ashcontaining pinewood soot was less reactive than the potassium rich herbaceous biomass soot, indicating a dominating role of potassium on the soot reactivity. However, the catalytic effect of potassium on the reactivity remained the same after a certain potassium amount was incorporated in the soot matrix during pyrolysis. Raman spectroscopy results showed that the carbon chemistry of biomass soot also affected the CO 2 reactivity. The less reactive pinewood soot was more graphitic than herbaceous biomass soot samples with the disordered carbon structure. .se (A. Trubetskaya).Fuel 225 (2018) 89-94 0016-2361/

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Section: Introductionsupporting

confidence: 86%

Potassium and soot interaction in fast biomass pyrolysis at high temperatures

Trubetskaya

Larsen

Shchukarev

et al. 2018

Fuel

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“…The observed decrease in soot oxidation activity over K-containing catalysts can be attributed to the volatile nature of possible oxides, peroxides of K or trace nitrates still present on the catalyst. The mobility of such compounds is expected to be high, leading to the observed decrease in soot oxidation temperature [12,14,18]. Platinum is probably enhancing the migration of such active species responsible for soot oxidation at much lower temperature compared with K-Al 2 O 3 catalyst alone.…”

Section: Discussionmentioning

confidence: 96%

Soot oxidation over NOx storage catalysts: Activity and deactivation

Kamasamudram

Makkee

2006

Catalysis Today

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“…The three pure cokes were tested together with 8 blending variations with 20 % content steps as shown in Table 3. To test the sensitivity of sodium from dirty butts addition [8] , bath fines of 0.1%Na were added in another series of recipes in Table 3. A total of 22 recipes were prepared.…”

Section: Preparation and Properties Test Of Bench Scale Anodesmentioning

confidence: 99%

Effect of coke properties and its blending recipe on performances of carbon anode for aluminium electrolysis

Liu

Mannweiler³

et al. 2006

J Cent. South Univ. Technol.

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The properties and blending recipe of petroleum cokes used to make high quality carbon anodes for aluminium electrolysis were studied. Three kinds of green cokes were selected for bench scale study to illustrate the effects of cokes properties and its blending recipe on anode performances. The results show that impurities derived mainly from cokes remarkably affect the CO 2 reactivity and air reactivity of carbon anodes. Ca, Na and V can increase CO 2 reactivity of calcined cokes but S has the contrary effect, and the cokes of high V level generally present high air reactivity. The anodes with good quality can be made by properly selecting and scientifically blending of cokes, some poor quality cokes can also be used to produce high quality anodes with a reasonable blending recipe. Na contaminated anodes have high CO 2 reactivity and air reactivity, so the recycled anode butts should be well cleaned to reduce Na content before being introduced into anode production, which is especially important to the low S cokes.

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Catalyst loss and retention during alkali-catalysed carbon gasification in CO2

Cited by 49 publications

References 21 publications

Potassium and soot interaction in fast biomass pyrolysis at high temperatures

Potassium and soot interaction in fast biomass pyrolysis at high temperatures

Soot oxidation over NOx storage catalysts: Activity and deactivation

Effect of coke properties and its blending recipe on performances of carbon anode for aluminium electrolysis

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