Co-gasification of black liquor and pyrolysis oil at high temperature: Part 1. Fate of alkali elements

Bach-Oller, Albert; Kirtania, Kawnish; Furusjö, Erik; Umeki, Kentaro

doi:10.1016/j.fuel.2017.04.013

Cited by 26 publications

(19 citation statements)

References 42 publications

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“…The feeding system was based on a syringe pump that displaces a bed of fuel that falls directly into the high temperature zone in the reactor through a water-cooled probe. The syringe pump was vibrated to ensure stable feeding of the fuel particles, as described by Bach-Oller et al [34]. In each experiments, ≈5 g of biomass were fed to the reactor at a rate of 0.2 g min −1 .…”

Section: Methodsmentioning

confidence: 99%

Characterization and reactivity of soot from fast pyrolysis of lignocellulosic compounds and monolignols

et al. 2018

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Biomass soot samples were generated at fast pyrolysis conditions in a DTF at 1250°C.• The reactivity of soot was determined in 40 vol.% CO 2 gasification by TGA.• The most reactive was cellulose soot with the largest separation distance.• The least reactive CH 3 OH extracted lignin soot had the smallest separation distance.• The particle size and radical concentration of soot influenced the reactivity less.

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Section: Methodsmentioning

confidence: 99%

Characterization and reactivity of soot from fast pyrolysis of lignocellulosic compounds and monolignols

et al. 2018

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“…Recent studies on alkali catalyzed gasification showed that as the total alkali (Na+K) to carbon ratio in char increases, the reactivity increases drastically during low temperature gasification (< 850 o C) [20]. On the other hand, at higher temperatures, part of the alkali is evaporated to exert other activities such as tar destruction and soot reduction [21,22]. In all scenarios, the lipid extracted algae species (Nannochloropsisgaditana) stands out as a suitable candidate for catalytic gasification.…”

Section: Fig4:cold Gas Efficiency Of Syngasmentioning

confidence: 99%

An Assessment of Gasification of Lipid-Extracted Algae by Thermodynamic Simulation

Kabir

Kirtania

2017

J Chem Engg

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Thermodynamic simulation of gasification of Nannochloropsis gaditana (after lipid extraction and before lipid extraction) over a wide range of temperatures (800 -1400 o C) was performed in this study. The reactor temperature variation with respect to the O 2 to fuel ratio and the syngas composition with temperature were evaluated for gasification performance. The results showed the H 2 /CO ratio for lipidextracted algae (LEA) was very similar to the gasification behavior of raw algae (RA) before lipid extraction. Only a slight variation was observed for the lower heating value (9.2 MJ/Nm 3 for RA and 8.9 MJ/Nm 3 for LEA at 1000 o C) of the syngas from the two feedstocks. The H 2 /CO ratio for both RA and LEA remained almost the same over the range of temperatures (800-1400 o C) under consideration. The cold gas efficiency was found between 82 % to 75 % for RA and 75 % to 69 % for LEA at 1000 o C and 1400 o C respectively. As the overall gasification performance did not degrade significantly after extraction of lipid from algae, the LEA holds remarkable potential as a gasification feedstock in a biorefinery set up.

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“…Studies in the current scientific literature are usually about gasification of bio-based pyrolysis oil. For example, from straw- and wood derived pyrolysis oil [ 43 , 44 ], or the co-gasification of biomass derived pyrolysis oil together with Kraft black liquor from the pulp and paper industry [ 45 , 46 , 47 ].…”

Section: Introductionmentioning

confidence: 99%

Entrained Flow Gasification of Polypropylene Pyrolysis Oil

et al. 2021

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Petrochemical products could be produced from circular feedstock, such as waste plastics. Most plants that utilize syngas in their production are today equipped with entrained flow gasifiers, as this type of gasifier generates the highest syngas quality. However, feeding of circular feedstocks to an entrained flow gasifier can be problematic. Therefore, in this work, a two-step process was studied, in which polypropylene was pre-treated by pyrolysis to produce a liquid intermediate that was easily fed to the gasifier. The products from both pyrolysis and gasification were thoroughly characterized. Moreover, the product yields from the individual steps, as well as from the entire process chain, are reported. It was estimated that the yields of CO and H2 from the two-step process were at least 0.95 and 0.06 kg per kg of polypropylene, respectively, assuming that the pyrolysis liquid and wax can be combined as feedstock to an entrained flow gasifier. On an energy basis, the energy content of CO and H2 in the produced syngas corresponded to approximately 40% of the energy content of the polypropylene raw material. This is, however, expected to be significantly improved on a larger scale where losses are proportionally smaller.

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Co-gasification of black liquor and pyrolysis oil at high temperature: Part 1. Fate of alkali elements

Cited by 26 publications

References 42 publications

Characterization and reactivity of soot from fast pyrolysis of lignocellulosic compounds and monolignols

Characterization and reactivity of soot from fast pyrolysis of lignocellulosic compounds and monolignols

An Assessment of Gasification of Lipid-Extracted Algae by Thermodynamic Simulation

Entrained Flow Gasification of Polypropylene Pyrolysis Oil

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