Use of a Reactor Network Model in the Design and Operation of a New Type of Membrane Wall Entrained Flow Gasifier

2013 ◽  
Vol 27 (10) ◽  
pp. 6322-6332 ◽  
Author(s):  
Zhiwei Yang ◽  
Zhe Wang ◽  
Yuxin Wu ◽  
Zheng Li ◽  
Weidou Ni
Keyword(s):  
Network Model ◽  
Entrained Flow ◽  
Entrained Flow Gasifier ◽  
New Type ◽  
Reactor Network

Thermogravimetric Analysis of Waste Gasification for an Entrained-Flow Gasifier.

2001 ◽  
Vol 27 (1) ◽  
pp. 27-33 ◽  
Author(s):  
Takatoshi Shoji ◽  
Masanori Nakamura ◽  
Hironori Ozaki
Keyword(s):  
Thermogravimetric Analysis ◽  
Entrained Flow ◽  
Entrained Flow Gasifier ◽  
Waste Gasification

Co-gasification of coal and biomass wastes in an entrained flow gasifier: Modelling, simulation and integration opportunities

2017 ◽  
Vol 37 ◽  
pp. 126-137 ◽  
Author(s):  
Dalia A. Ali ◽  
Mamdouh A. Gadalla ◽  
Omar Y. Abdelaziz ◽  
Christian P. Hulteberg ◽  
Fatma H. Ashour
Keyword(s):  
Entrained Flow ◽  
Entrained Flow Gasifier ◽  
Modelling Simulation

scholarly journals Investigation of the Coal Gasification Process Under Various Operating Conditions Inside a Two-Stage Entrained Flow Gasifier

2012 ◽  
Vol 4 (2) ◽  
Author(s):  
Armin Silaen ◽  
Ting Wang
Keyword(s):  
Coal Gasification ◽  
Operating Conditions ◽  
Coal Slurry ◽  
Two Stage ◽  
Heating Value ◽  
Fuel Distribution ◽  
Entrained Flow ◽  
One Stage ◽  
Gasification Process ◽  
Entrained Flow Gasifier

Numerical simulations of the coal gasification process inside a generic 2-stage entrained-flow gasifier fed with Indonesian coal at approximately 2000 metric ton/day are carried out. The 3D Navier–Stokes equations and eight species transport equations are solved with three heterogeneous global reactions, three homogeneous reactions, and two-step thermal cracking equation of volatiles. The chemical percolation devolatilization (CPD) model is used for the devolatilization process. This study is conducted to investigate the effects of different operation parameters on the gasification process including coal mixture (dry versus slurry), oxidant (oxygen-blown versus air-blown), and different coal distribution between two stages. In the two-stage coal-slurry feed operation, the dominant reactions are intense char combustion in the first stage and enhanced gasification reactions in the second stage. The gas temperature in the first stage for the dry-fed case is about 800 K higher than the slurry-fed case. This calls for attention of additional refractory maintenance in the dry-fed case. One-stage operation yields higher H2, CO and CH4 combined than if a two-stage operation is used, but with a lower syngas heating value. The higher heating value (HHV) of syngas for the one-stage operation is 7.68 MJ/kg, compared with 8.24 MJ/kg for two-stage operation with 75%–25% fuel distribution and 9.03 MJ/kg for two-stage operation with 50%–50% fuel distribution. Carbon conversion efficiency of the air-blown case is 77.3%, which is much lower than that of the oxygen-blown case (99.4%). The syngas heating value for the air-blown case is 4.40 MJ/kg, which is almost half of the heating value of the oxygen-blown case (8.24 MJ/kg).

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