An Investigation on The Parametric Study of Co-gasification in Allothermal Circulating Fluidized Bed Gasifier. | [Journal of Pakistan Institute of Chemical Engineers • 2018]

Author(s):

1. S. Hussain: NFC Institute of Engineering and Technology, Multan, Pakistan

2. N. A. Akhtar: University of the Punjab, Lahore, Pakistan

3. A. Choughtai: SCME National University of Sciences and Technology (NUST, Pakistan

4. A. A. Malik: NFC Institute of Engineering and Technology, Multan, Pakistan

5. M. Usman: NFC Institute of Engineering and Technology, Multan, Pakistan

6. K. Shahzad: Institute of Chemical Engineering & Technology, University of the Punjab, Lahore, Pakistan

Abstract:

Co-gasification of coal and bagasse in circulating fluidized bed gasifier (CFBG) is an emerging technique. The objectives of the current study are to investigate the influence of different parameters (temperature, ER values and feed composition) on the yield of producer gas in temperature range of 750 °C to 950 °C under reducing atmosphere. The study revealed that higher ER values (0.24 to 0.38) not only effected the composition of the producer gas but also has strong influence on the temperature profile in the riser section of the gasifier. In the temperature range of 792 °C-882 °C, the molar ratio of H2/CO was decreased from 0.71 to 0.66, but with further increase in temperature (888 to 931 oC) the molar ratio increased from 0.72 to 0.81. However, the molar ratio of CO/CO2 decreased from 0.85 to 0.74 (for shift of temperature from 792 to 882 oC) and then decreased from 0.74 to 0.60 for the temperature range of 882 to 931 oC. The increase of bagasse fraction in low-grade coal leads to the decrease in the concentration of CO, H2and CH4, however, an increase in the CO2 concentration was observed due to increased fraction of oxidants in the feedstock.

Page(s): 33-43

DOI: DOI not available

Published: Journal: Journal of Pakistan Institute of Chemical Engineers, Volume: 46, Issue: 2, Year: 2018

Keywords:

Bagasse , synthesis gas , Fluidized bed , Cogasification

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