1. Numerical analysis on the influential factors of coal gasification performance in two-stage entrained flow gasifier
- Author
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Kaleemullah Memon, Imran Nazir Unar, Sunel Kumar, Rasool Bux Mahar, YiJun Jia, Umair Sultan, Lijun Wang, Mujahid Ali, and Rundong Li
- Subjects
Maximum temperature ,Materials science ,Wood gas generator ,Waste management ,business.industry ,020209 energy ,Flow (psychology) ,Analytical chemistry ,Energy Engineering and Power Technology ,chemistry.chemical_element ,02 engineering and technology ,Oxygen ,Industrial and Manufacturing Engineering ,020401 chemical engineering ,chemistry ,0202 electrical engineering, electronic engineering, information engineering ,Coal gasification ,Coal ,Stage (hydrology) ,0204 chemical engineering ,business ,Cfd software - Abstract
In this study 2D numerical simulation for two-stage entrained flow dry feed coal gasification performance was developed. The detailed operational characteristics of O/C distribution between the two stages of the gasifier were examined in standard CFD software FLUENT®14 to analyze their effects on the gasification performance. Furthermore the different reaction mechanisms were investigated for validation of the model with experimental results. The results show that H 2 and CO composition at the exit of gasifier are increased at O/C ratio 0.8 as compared to other simulation cases, and the temperature gradually decreases from 2nd injection level because of water-shift reaction. Maximum CO% was observed when 40% of oxygen injected at the lower level, overall range of H 2 % at the exit of gasifier was 10–45% but maximum H 2 % was found when 50% O 2 % and 30% of coal injected at a lower level. The maximum temperature about 2300 K when 40% O 2 and 40% of coal was injected at a lower level. Overall optimized results for CO, H 2 , and minimum CO 2 formation was observed when 60% O 2 and 40% of coal was injected at a lower level of the gasifier. The gasification performance can be controlled with the optimized coal/oxidant distribution between the stages.
- Published
- 2017