Fluidized bed gasification of coal-oil and coal-water-oil slurries by oxygen-steam and oxygen-CO2 mixtures

Karel Svoboda; Michael Pohořelý; Michal Jeremiáš; Petra Kameníková; Miloslav Hartman; Siarhei Skoblja; Michal Šyc

doi:10.1016/j.fuproc.2011.11.001

Fluidized bed gasification of coal-oil and coal-water-oil slurries by oxygen-steam and oxygen-CO₂ mixtures

Karel Svoboda^*, Michael Pohořelý, Michal Jeremiáš, Petra Kameníková, Miloslav Hartman, Siarhei Skoblja, Michal Šyc^*

^*Corresponding author for this work

Not published at VTT

Research output: Contribution to journal › Article › Scientific › peer-review

37 Citations (Scopus)

Abstract

Polish bituminous coal, German brown (subbituminous) coal and rapeseed oil were selected for preparation of coal-oil slurry (COS) and coal-oil in water slurry (COWS) with content of coal about 50 mass%. Laboratory, electrically heated gasifier with fluidized bed (FB) of sand particles was used for the coal slurries gasification with steam-O₂ and CO₂-O₂ mixtures (ER = 0.19-0.23) at temperatures between 800 and 925 °C. FB gasification with mixtures of O₂/CO₂ (CO₂/dry fuel mass ratio 1-2.4) can generate producer gas with LHV values about 8-10 MJ/m³. The heating value of the dry, N₂-free producer gas from CO₂-O₂ gasification is lower in comparison with gasification by steam-O₂ mixtures at comparable conditions. The heating value of the producer gas is influenced by a relatively high content of methane, ethylene and BTX compounds. The yield of heavier tar compounds (excluding BTX) is high, exceeding 20 g tar/kg of dry German coal based COS and exceeding 36 g/kg of fuel for Polish coal based COS. Cold gas efficiency is higher for fuel gas from gasification of COS based on the German, subbituminous coal. FB gasification (ER ≈ 0.2) of the COWS prepared from the Polish coal (contents of coal, water and oil 47, 40 and 12 mass% respectively) reduces tar yield approximately to an half (related to gasification of the corresponding COS slurry), but simultaneously moderately reduces the heating value (LHV) of the dry, nitrogen free producer gas.

Original language	English
Pages (from-to)	16-26
Journal	Fuel Processing Technology
Volume	95
DOIs	https://doi.org/10.1016/j.fuproc.2011.11.001
Publication status	Published - Mar 2012
MoE publication type	A1 Journal article-refereed

Funding

The authors appreciate the financial support provided by the EU Research Fund for Coal and Steel , grant RFCR-CT-2010-00009 and support from the Ministry of Education, Youth and Sport of Czech Republic , grant project WARMES, No. 2B08048 and grant 7C08034 —Near zero emission advanced fluidised bed gasification.

Keywords

Coal
Fluidized bed
Gasification
Oil
Slurry

Access to Document

10.1016/j.fuproc.2011.11.001

Cite this

@article{3e9d9aeea071444092d30efc39db53c7,

title = "Fluidized bed gasification of coal-oil and coal-water-oil slurries by oxygen-steam and oxygen-CO2 mixtures",

abstract = "Polish bituminous coal, German brown (subbituminous) coal and rapeseed oil were selected for preparation of coal-oil slurry (COS) and coal-oil in water slurry (COWS) with content of coal about 50 mass\%. Laboratory, electrically heated gasifier with fluidized bed (FB) of sand particles was used for the coal slurries gasification with steam-O2 and CO2-O2 mixtures (ER = 0.19-0.23) at temperatures between 800 and 925 °C. FB gasification with mixtures of O2/CO2 (CO2/dry fuel mass ratio 1-2.4) can generate producer gas with LHV values about 8-10 MJ/m³. The heating value of the dry, N2-free producer gas from CO2-O2 gasification is lower in comparison with gasification by steam-O2 mixtures at comparable conditions. The heating value of the producer gas is influenced by a relatively high content of methane, ethylene and BTX compounds. The yield of heavier tar compounds (excluding BTX) is high, exceeding 20 g tar/kg of dry German coal based COS and exceeding 36 g/kg of fuel for Polish coal based COS. Cold gas efficiency is higher for fuel gas from gasification of COS based on the German, subbituminous coal. FB gasification (ER ≈ 0.2) of the COWS prepared from the Polish coal (contents of coal, water and oil 47, 40 and 12 mass\% respectively) reduces tar yield approximately to an half (related to gasification of the corresponding COS slurry), but simultaneously moderately reduces the heating value (LHV) of the dry, nitrogen free producer gas.",

keywords = "Coal, Fluidized bed, Gasification, Oil, Slurry",

author = "Karel Svoboda and Michael Poho{\v r}el{\'y} and Michal Jeremi{\'a}{\v s} and Petra Kamen{\'i}kov{\'a} and Miloslav Hartman and Siarhei Skoblja and Michal {\v S}yc",

note = "Funding Information: The authors appreciate the financial support provided by the EU Research Fund for Coal and Steel , grant RFCR-CT-2010-00009 and support from the Ministry of Education, Youth and Sport of Czech Republic , grant project WARMES, No. 2B08048 and grant 7C08034 —Near zero emission advanced fluidised bed gasification.",

year = "2012",

month = mar,

doi = "10.1016/j.fuproc.2011.11.001",

language = "English",

volume = "95",

pages = "16--26",

journal = "Fuel Processing Technology",

issn = "0378-3820",

publisher = "Elsevier",

}

TY - JOUR

T1 - Fluidized bed gasification of coal-oil and coal-water-oil slurries by oxygen-steam and oxygen-CO2 mixtures

AU - Svoboda, Karel

AU - Pohořelý, Michael

AU - Jeremiáš, Michal

AU - Kameníková, Petra

AU - Hartman, Miloslav

AU - Skoblja, Siarhei

AU - Šyc, Michal

N1 - Funding Information: The authors appreciate the financial support provided by the EU Research Fund for Coal and Steel , grant RFCR-CT-2010-00009 and support from the Ministry of Education, Youth and Sport of Czech Republic , grant project WARMES, No. 2B08048 and grant 7C08034 —Near zero emission advanced fluidised bed gasification.

PY - 2012/3

Y1 - 2012/3

N2 - Polish bituminous coal, German brown (subbituminous) coal and rapeseed oil were selected for preparation of coal-oil slurry (COS) and coal-oil in water slurry (COWS) with content of coal about 50 mass%. Laboratory, electrically heated gasifier with fluidized bed (FB) of sand particles was used for the coal slurries gasification with steam-O2 and CO2-O2 mixtures (ER = 0.19-0.23) at temperatures between 800 and 925 °C. FB gasification with mixtures of O2/CO2 (CO2/dry fuel mass ratio 1-2.4) can generate producer gas with LHV values about 8-10 MJ/m³. The heating value of the dry, N2-free producer gas from CO2-O2 gasification is lower in comparison with gasification by steam-O2 mixtures at comparable conditions. The heating value of the producer gas is influenced by a relatively high content of methane, ethylene and BTX compounds. The yield of heavier tar compounds (excluding BTX) is high, exceeding 20 g tar/kg of dry German coal based COS and exceeding 36 g/kg of fuel for Polish coal based COS. Cold gas efficiency is higher for fuel gas from gasification of COS based on the German, subbituminous coal. FB gasification (ER ≈ 0.2) of the COWS prepared from the Polish coal (contents of coal, water and oil 47, 40 and 12 mass% respectively) reduces tar yield approximately to an half (related to gasification of the corresponding COS slurry), but simultaneously moderately reduces the heating value (LHV) of the dry, nitrogen free producer gas.

AB - Polish bituminous coal, German brown (subbituminous) coal and rapeseed oil were selected for preparation of coal-oil slurry (COS) and coal-oil in water slurry (COWS) with content of coal about 50 mass%. Laboratory, electrically heated gasifier with fluidized bed (FB) of sand particles was used for the coal slurries gasification with steam-O2 and CO2-O2 mixtures (ER = 0.19-0.23) at temperatures between 800 and 925 °C. FB gasification with mixtures of O2/CO2 (CO2/dry fuel mass ratio 1-2.4) can generate producer gas with LHV values about 8-10 MJ/m³. The heating value of the dry, N2-free producer gas from CO2-O2 gasification is lower in comparison with gasification by steam-O2 mixtures at comparable conditions. The heating value of the producer gas is influenced by a relatively high content of methane, ethylene and BTX compounds. The yield of heavier tar compounds (excluding BTX) is high, exceeding 20 g tar/kg of dry German coal based COS and exceeding 36 g/kg of fuel for Polish coal based COS. Cold gas efficiency is higher for fuel gas from gasification of COS based on the German, subbituminous coal. FB gasification (ER ≈ 0.2) of the COWS prepared from the Polish coal (contents of coal, water and oil 47, 40 and 12 mass% respectively) reduces tar yield approximately to an half (related to gasification of the corresponding COS slurry), but simultaneously moderately reduces the heating value (LHV) of the dry, nitrogen free producer gas.

KW - Coal

KW - Fluidized bed

KW - Gasification

KW - Oil

KW - Slurry

UR - http://www.scopus.com/inward/record.url?scp=82455175439&partnerID=8YFLogxK

U2 - 10.1016/j.fuproc.2011.11.001

DO - 10.1016/j.fuproc.2011.11.001

M3 - Article

AN - SCOPUS:82455175439

SN - 0378-3820

VL - 95

SP - 16

EP - 26

JO - Fuel Processing Technology

JF - Fuel Processing Technology

ER -