Release of Inorganic Elements from Gasification and Co-Gasification of Coal with Miscanthus, Straw, and Wood at High Temperature

Abstract

Three biomass energy feedstocks (wood, straw, and miscanthus) are co-gasified at 1400 °C with two lignites and two hard coals. The objective of this work was to determine the release of alkali metal, chlorine, and sulfur species and to correlate the release with the share of the fuel in the blends. The release of the inorganics is detected using a molecular beam mass spectrometer. Significant species are 34 H 2 S + , 36 HCl + , 58 NaCl + , 60 COS + , and 74 KCl + . By comparison of the experimental data with calculations, the influence of the inorganic content of the fuel blends on important release mechanisms and trends is determined. It is shown that the Al/Si ratio and the chlorine content have a major influence on the release of alkali metal species in general. Additionally, it was found that the Al/Si ratio has a strong influence on the release of sulfur species through changes of the availability of Ca.

Geochemistry of Croatian superhigh-organic-sulphur Raša coal, imported low-S coal and bottom ash: their Se and trace metal fingerprints in seawater, clover, foliage and mushroom specimens

“…Since SO 2 has been emitted whenever fuels containing sulphur, like coal, coke and oil, are burnt, its main anthropogenic emission sources are coal-fired power plants, central-heating stations, and industrial furnaces in the iron and steel industry (Speight, 2013). Herewith, a considerable amount of research of sulphur emission processes, pathways, budgets and environmental issues has been published so far (Speight, 2005;Baruah and Khare, 2010;Bläsing et al, 2015;Saikia and Ninomiya, 2011;Saikia et al, 2015;Dutta et al, 2017). Although the sulphur content in coal varies considerably, its total levels most commonly range from 0.50% to 5.00% (Rađenović, 2004;Chou, 2012).…”

Geochemistry of Croatian superhigh-organic-sulphur Raa coal, imported low-S coal, and bottom ash: their Se and trace metal fingerprints in seawater, clover, foliage, and mushroom specimens

“…Since SO 2 has been emitted whenever fuels containing sulphur, like coal, coke and oil, are burnt, its main anthropogenic emission sources are coal-fired power plants, central-heating stations, and industrial furnaces in the iron and steel industry (Speight, 2013). Herewith, a considerable amount of research of sulphur emission processes, pathways, budgets and environmental issues has been published so far (Speight, 2005; Baruah and Khare, 2010;Bläsing et al, 2015;Saikia and Ninomiya, 2011;Saikia et al, 2015;Dutta et al, 2017). Although the sulphur content in coal varies considerably, its total levels most commonly range from 0.50% to 5.00% (Rađenović, 2004;Chou, 2012).…”

Chemical fractionation of inorganic constituents in entrained flow gasification of slurry from straw pyrolysis

“…After the two following vacuum chambers a pressure of 100 nPa is reached and the gas phase is analyzed by mass spectrometry. The detailed setup of the MBMS is described in Blasing et al [17,18]. In this study, CO/CO 2 and K as main fragment of potassium species was qualitatively and semi-quantitatively measured.…”

“…1). The distribution between the accompanying components Si, Ca, Cl will influence the release behavior of K significantly [17][18][19] . Therefore, the study will mainly focus on the content of these four elements.…”

“…The hot gas phase can be online monitored by using molecular beam mass spectrometry (MBMS). Recent studies focus on the different release of inorganics from coal, straw, and blends under combustion or gasification related atmospheres [17,18,39,40]. Devolatilization and char reactions were distinguished at several times.…”