Release of alkali metal, sulphur and chlorine species during high-temperature gasification and co-gasification of hard coal, refinery residue, and petroleum coke

Bläsing, Marc; Nazeri, Kaveh; Müller, Michael

doi:10.1016/j.fuel.2014.02.042

Cited by 34 publications

(16 citation statements)

References 17 publications

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“…Otherwise, the COS yields were similar from both feedstocks. It was previously concluded that the release of sulfur species during gasification of coal is complex and highly dependent on the mode of occurrence of sulfur, as well as the influence of other inorganic elements of the ash such as calcium (Ca) and magnesium (Mg), which may have a capturing effect [29,30]. The higher calcium content of the hardwood bark may therefore have prevented the sulfur release, resulting in the overall lower H 2 S and COS yields in this work.…”

Section: Minor Syngas Components and Particlesmentioning

confidence: 99%

“…Other researchers also conclude that additional research is necessary to fully understand the effect of stoichiometry, gasification temperature, and other inorganic species on the release of sulfur species to the product gas [31]. COS can be converted to H 2 S via the reaction COS + H 2 O H 2 S + CO 2 , but reaction kinetics is reported to be slow [30]. This may explain why the COS yield did not appear to be significantly affected by operating conditions during the experimental trials (Figure 7b).…”

Section: Minor Syngas Components and Particlesmentioning

confidence: 99%

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Oxygen-Blown Gasification of Pulp Mill Bark Residues for Synthetic Fuel Production

2021

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Synthetic fuel production via gasification of residual biomass streams from the pulp and paper industry can be an opportunity for the mills to enable improved resource utilization and at the same time reduce the production of excess heat. This paper summarizes initial oxygen-blown gasification experiments with two bark residues from a European pulp and paper mill, i.e., a softwood bark and a hardwood bark. The gasification process was characterized by measuring syngas yields and process efficiency to find optimum operating conditions. In addition, impurities in the syngas and ash behavior were characterized. Maximum yields of CO and H2 were obtained from softwood bark and amounted to approximately 29 and 15 mol/kg fuel, respectively. Optimum cold gas efficiency was achieved at an oxygen stoichiometric ratio of λ = 0.40 and was approximately 76% and 70% for softwood bark and hardwood bark, respectively. Increased λ had a reducing effect on pollutants in the syngas, e.g., higher hydrocarbons, NH3, HCl, and soot. The situation for sulfur species was more complex. Evaluation of the bark ashes indicated that slag formation could start already from 800 °C. Furthermore, a non-intrusive laser diagnostics technique gave rapid feedback on the millisecond scale. Measured syngas temperature and water content were in good agreement with the applied reference methods.

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Section: Minor Syngas Components and Particlesmentioning

confidence: 99%

Section: Minor Syngas Components and Particlesmentioning

confidence: 99%

Oxygen-Blown Gasification of Pulp Mill Bark Residues for Synthetic Fuel Production

2021

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“…The spectrum of O1s revealed two characteristic oxygen states of MgO (529.8 eV) and Al 2 O 3 or C=O (531.1 eV). The ash content of petroleum coke may be composed of some inorganic constituent, such as magnesium, aluminum, calcium, or iron [29,30]. Therefore, Mg or Al doping could be introduced into the resultant carbon products.…”

Section: Chemical Properties Analysismentioning

confidence: 99%

Comparison on physical, chemical, and adsorption properties of activated carbon derived from different solid wastes

Gao

Yue

Gao

2016

Desalination and Water Treatment

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A B S T R A C TFour activated carbons (ACs) were prepared from four different solid wastes (SWs), including Enteromorpha prolifera, Kraft lignin, hair, and petroleum coke, using KOH as the activating agent. The fabricated ACs were characterized by N 2 adsorption, scanning electron microscopy, transmission electron microscopy, X-ray diffraction, Fourier transformed infrared and X-ray photoelectron spectroscopy to compare their pore structures and surface chemical properties of the ACs. It was found that ACs produced from E. prolifera and Kraft lignin were rich in mesopores, whereas petroleum coke and hair were inclined to produce ACs with more micropores. Meanwhile, ACs derived from E. prolifera possessed the largest surface area of 3,471 m 2 g −1 and pore volume of 2.681 cm 3 g −1 . In addition, ACs prepared from various SWs displayed different chemical nature. Adsorption behavior of hexavalent chromium on the four fabricated ACs was studied as well, and the adsorption data were all well fitted by Freundlich equation, indicating the similar multilayer adsorption behavior of hexavalent chromium on the heterogeneous surface of the ACs.

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“…More recently, some of the coal gasification plants have addressed not only the issue of carbon capture and sequestration but also poly‐generation strategies . With the development and maturity of gasification technology, there is an increasing number of studies on cogasification of coal with other low‐grade solid fuels such as biomass, petroleum coke, refinery residues, and sewage sludge, which would be one of the effective approaches for a rational utilization of various resources.…”

Section: Introductionmentioning

confidence: 99%

A study on the chemical state of carbon present in fine ash from gasification

Zhang

Gao

et al. 2019

Asia-Pacific J Chem Eng

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Taking feed coal as a reference, the chemical states, content changes, microstructure, distribution, and graphitizable extent of carbon present in gasification fine ash were investigated in detail. The results show that the fine ash includes a significant amount of unreacted carbon. The C1s spectrum is composed of four components in which the contents of C-C and C-H decrease dramatically and graphitized carbon (39.1%) presents. The elemental carbon primarily distributes on the layer structure, whereas elemental silicon and aluminum are mainly found on spherical particles embedded in the layer structure. After gasification, carbon atoms in gasification fine ash are arranged in an orderly manner, and the extent of graphitization of carbon increases, which indicates that carbon in feed coal may be partly graphitized and deposited in fine ash during gasification process.

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Release of alkali metal, sulphur and chlorine species during high-temperature gasification and co-gasification of hard coal, refinery residue, and petroleum coke

Cited by 34 publications

References 17 publications

Oxygen-Blown Gasification of Pulp Mill Bark Residues for Synthetic Fuel Production

Oxygen-Blown Gasification of Pulp Mill Bark Residues for Synthetic Fuel Production

Comparison on physical, chemical, and adsorption properties of activated carbon derived from different solid wastes

A study on the chemical state of carbon present in fine ash from gasification

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