Evolution of dolomite composition and reactivity during biomass gasification

Hervy, Maxime; Olcese, Roberto N.; Bettahar, M.M.; Mallet, Martine; Renard, Aurélien; Maldonado, Libeth; Remy, Damien; Mauviel, Guillain; Dufour, Anthony

doi:10.1016/j.apcata.2018.12.014

Cited by 52 publications

(18 citation statements)

References 98 publications

(147 reference statements)

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“…It can be seen that layers formed by bark combustion lead to the same H 2 contents with lower BET surface areas compared to B7C3 and chicken manure combustion. Studies focused on dolomite from air gasification observed a different connection between BET surface area and catalytic activity [45]. For used dolomite, the catalytic activity regarding benzene steam reforming was decreased by 24% compared to unused (but calcined) dolomite while the BET surface area increased from 0.4 to 19.5 m 2 g −1 during gasification.…”

Section: Discussionmentioning

confidence: 98%

Impact of residual fuel ash layers on the catalytic activation of K-feldspar regarding the water–gas shift reaction

Fürsatz

Kuba

Janisch

et al. 2020

Biomass Conv. Bioref.

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Interaction of biomass ash and bed materials in thermochemical conversion in fluidized beds leads to changes of the bed particle surface due to ash layer formation. Ash components present on the bed particle surface strongly depend on the ash composition of the fuel. Thus, the residual biomass used has a strong influence on the surface changes on bed particles in fluidized bed conversion processes and, therefore, on the catalytic performance of the bed material layers. Ash layer formation is associated with an increase in the catalytic activity of the bed particles in gasification and plays a key role in the operability of different biomass fuels. The catalytic activation over time was observed for K-feldspar used as the bed material with bark, chicken manure, and a mixture of bark and chicken manure as fuels. The changes on the bed material surfaces were further characterized by SEM/ EDS and BET analyses. Raman, XPS, and XRD analyses were used to characterize the crystal phases on the bed material surface. An increase in surface area over time was observed for K-feldspar during the interaction with biomass ash. Additionally, a more inhomogeneous surface composition for fuels containing chicken manure in comparison to pure bark was observed. This was due to the active participation of phosphorus from the fuel ash in the ash transformation reactions leading to their presence on the particle surface. A decreased catalytic activity was observed for the same BET surface area compared to bark combustion, caused by the different fuel ash composition of chicken manure.

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Section: Discussionmentioning

confidence: 98%

Impact of residual fuel ash layers on the catalytic activation of K-feldspar regarding the water–gas shift reaction

Fürsatz

Kuba

Janisch

et al. 2020

Biomass Conv. Bioref.

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“…Optimization studies of catalytic steam reforming show that this process takes place at high temperature ranges (700 -1000 °C) in the presence of catalysts [5]. Different catalysts have been studied to enhance the catalytic steam reforming process.…”

Section: Takedownmentioning

confidence: 99%

“…Also, different support materials such as Al2O3, SiO2, MCM-41, zeolites, and dolomite etc. have been reported in the literature to be active for steam reforming reactions [5,[10][11][12][13].…”

Section: Takedownmentioning

confidence: 99%

“…Figure 3 shows that with the increase in steam WHSV from 1 to 5 mL h -1 g -1 catalyst, H2 and CO2 yields increased with a corresponding decrease in CH4 and CnHm yields, due to steam reforming reactions (Eqs. [3][4][5][6]. However with the further increase in steam WHSV to 9 346 mL h -1 g -1 catalyst, H2, CO and CO2 yield reduced while CH4 and CnHm yield increased.…”

Section: Influence Of Steam Weight Hourly Space Velocity (Whsv)mentioning

confidence: 99%

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Synthetic natural gas production from the three stage (i) pyrolysis (ii) catalytic steam reforming (iii) catalytic hydrogenation of waste biomass

Jaffar

Nahil

Williams

2020

Fuel Processing Technology

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“…Most of the tar cracking catalysts studied in tandem with plasma are nickel or noble-metal supported catalysts. Traditional tar cracking catalysts such as dolomite [74,75,76], olivine [77,78,79], K 2 CO 3 [80,81], CaO [82,83,84], iron oxides [85] and chars [86,87,88] are yet to be explored. Indeed most of the catalysts found in many tar removal reviews [13,38,57,58] have been unexplored in tandem with plasma.…”

Section: Cold Plasmas In Hybrid Units: Secondary Refining Unitsmentioning

confidence: 99%

The role of plasma in syngas tar cracking

Rueda

Helsen

2019

Biomass Conv. Bioref.

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Gasification of biomass and municipal solid waste is a technology that has been proposed as a dualpurpose solution for mitigating environmental impacts as well as for producing syngas, a very useful intermediary product for energy valorization and organic synthesis. However the presence of pollutants, notably tar, hamper this raw syngas (producer syngas) to be used in high-efficient energy applications such as jet engines, fuel cells or in Fischer-Tropsch synthesis, limiting its economic value. For reducing tar a lot of scientific and technical effort has been devoted. In this paper, the state-of-the-art of plasma tar removal from syngas is done, focusing on the use of plasma in tandem with existing technologies, underlining its advantages and the remaining challenges. The most promising ways to get a syngas with very low tar levels using plasma seem to be: (i) tandem tar cleaning techniques (e.g. secondary plasma enhanced catalytic unit) and (ii) secondary thermal plasma cracking units. Keywords tar cracking • plasma • syngas cleaning 1 IntroductionThe conversion of carbon-rich raw materials such as biomass and Municipal Solid Waste(MSW) into syngas has been proposed as the perfect solution for decreasing the amount of waste and byproducts discarded while obtaining a syngas that can be used for organic

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Evolution of dolomite composition and reactivity during biomass gasification

Cited by 52 publications

References 98 publications

Impact of residual fuel ash layers on the catalytic activation of K-feldspar regarding the water–gas shift reaction

Impact of residual fuel ash layers on the catalytic activation of K-feldspar regarding the water–gas shift reaction

Synthetic natural gas production from the three stage (i) pyrolysis (ii) catalytic steam reforming (iii) catalytic hydrogenation of waste biomass

The role of plasma in syngas tar cracking

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