Release of alkali metal, sulphur, and chlorine species from high temperature gasification of high- and low-rank coals

Bläsing, Marc; Müller, Michael

doi:10.1016/j.fuproc.2012.08.010

Cited by 50 publications

(33 citation statements)

References 18 publications

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“…%). Both the transformation and the release to gas phase of ash compounds during thermo-chemical processes have been shown in other studies [23,24], although this was usually found to take place at higher temperatures.…”

Section: Solid Yield and Carbon Content In The Solidmentioning

confidence: 61%

Air–steam gasification of sewage sludge in a fluidized bed. Influence of some operating conditions

Gil-Lalaguna

Sánchez

Murillo

et al. 2014

Chemical Engineering Journal

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An experimental work was carried out to investigate the viability of energy recovery from the air-steam gasification of sewage sludge. The relative influence of different factors, as well as the effect of their possible interactions, has been determined by means of analysis of variance. Temperature was found to be the most influential factor for most of the variables analyzed. Solid yield (35-41 wt. %) and tar content (11-45 g/m 3 STP ) were largely reduced with temperature, whereas gas production (0.89-1.32 m 3 STP /kg sewage sludge dry and ash free), carbon yield to gas phase (62-90 wt. %), gasification efficiency (39-66 %), and H 2 and CO yields (20-52 and 137-414 g/kg sewage sludge dry and ash free, respectively) were improved at high temperature. Other important parameters for the end-use of the gas such as its heating value (4.12-6.20 MJ/m 3 STP ) and its H 2 /CO molar ratio (1.46-3.25) were greatly influenced by the composition of the gasification medium, since the increase in the steam to oxygen ratio was favourable for both. The comparison of experimental and theoretical results highlights that equilibrium was not reached during the experimental runs.

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Section: Solid Yield and Carbon Content In The Solidmentioning

confidence: 61%

Air–steam gasification of sewage sludge in a fluidized bed. Influence of some operating conditions

Gil-Lalaguna

Sánchez

Murillo

et al. 2014

Chemical Engineering Journal

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“…Chemical analysis was performed by the central division of analytical chemistry (ZCH) of the Forschungszentrum Jülich. The standard methods used and variance of analytical results are detailed elsewhere [6].…”

Section: Fuel Preparationmentioning

confidence: 99%

“…Recently, online mass spectrometric techniques [5][6][7][8] have predominantly been used to measure in situ decomposition and reaction products from high temperature gasification and combustion processes. In particular, molecular beam mass spectrometry (MBMS) yields time dependent, online, simultaneous data pertaining to the release of volatile inorganic species under high temperature conditions of industrial interest [9].…”

Section: Introductionmentioning

confidence: 99%

“…Recent investigations in the area of the release of volatile inorganic species from low rank coals under gasification conditions have focused on the effects of temperature, pressure, oxygen partial pressure and steam addition [6,[10][11][12][13][14]. However, the influence of different bulk gas atmospheres on the release mechanisms is still unknown.…”

Section: Introductionmentioning

confidence: 99%

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The temperature-dependent release of volatile inorganic species from Victorian brown coals and German lignites under CO2 and H2O gasification conditions

Tanner

Bläsing²,

Müller³

et al. 2015

Fuel

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“…Thus, alkali transfer during coal combustion has been investigated by many researchers Bläsing and Müller, 2013;Bläsing et al, 2011;Schürmann et al, 2007;Naruse et al, 1998;Gottwald et al, 2002). In these studies, the effects of several factors such as coal type and its composition, operating conditions (temperature, pressure, residence time) and gas composition on alkali release were investigated.…”

Section: Introductionmentioning

confidence: 99%

Study of Alkali Emission and Control with Firing a High Alkali Coal

Kang

Zhang

et al. 2015

Combustion Science and Technology

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In this study, the sodium emission and control with firing a high alkali coal was investigated in a high-temperature muffle furnace. Kaolin was chosen as an additive tested to clarify its sodium capture mechanism and assess its capture performance. The influence of some firing-related factors such as kaolin dosage, temperature and particle sizes of both kaolin and coal on sodium release and sodium capture performance of kaolin was also studied. It was found that more sodium was released when the combustion temperature rose or fine fuel particles were combusted. Kaolin could efficiently capture sodium species to form high-melting sodium alminosilicates, primarily nepheline or carnegieite. Increasing kaolin dosage led to the promoted sodium retention. However, the promotion was not that pronounced in high kaolin dosages. High temperature had a negative effect on sodium capture by kaolin, which could be ascribed to the increasing sodium emission with temperature. Fine kaolin particles exhibited a good sodium Downloaded by [Stockholm University Library] at 21:55 11 August 2015A c c e p t e d M a n u s c r i p t 2 capture performance. Coal particle size had little impact on the interactions between kaolin and sodium species. More than 80 % of the total sodium was retained in ash by kaolin when firing coal (30 µm) with 3 µm kaolin addition in the dosage of 6 wt. % at 1100 °C.

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Release of alkali metal, sulphur, and chlorine species from high temperature gasification of high- and low-rank coals

Cited by 50 publications

References 18 publications

Air–steam gasification of sewage sludge in a fluidized bed. Influence of some operating conditions

Air–steam gasification of sewage sludge in a fluidized bed. Influence of some operating conditions

The temperature-dependent release of volatile inorganic species from Victorian brown coals and German lignites under CO2 and H2O gasification conditions

Study of Alkali Emission and Control with Firing a High Alkali Coal

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