02221nas a2200205 4500008004100000245008400041210007100125260000800196300001400204490000700218520153200225100002001757700002301777700002401800700001601824700001901840700001801859700002301877856011501900 2020 eng d00aCo-gasification of high ash coal–biomass blends in a fluidized bed gasifier: 0 aCogasification of high ash coal–biomass blends in a fluidized be cJAN a323–3410 v113 a

Co-gasification (COG) is a clean-coal technology that uses a binary blend of coal and biomass for generating the product gas; it is environment-friendly since it emits lesser quantities of pollutants compared to the coal gasification process. Although coals found in many countries contain high percentages of ash, co-gasification studies involving such coals, and the process modeling thereof, are rare. Accordingly, this study presents results of the co-gasification experiments conducted in a fluidized-bed gasifier (FBG) pilot plant using as a feed the blends of high ash Indian coals with three biomasses, namely, rice husk, press mud, and sawdust. Since the underlying physicochemical phenomena are complex and nonlinear, modeling of the COG process has been performed using three computational intelligence (CI)-based methods namely, genetic programming, artificial neural networks, and support vector regression. Each of these formalisms was employed separately to develop models predicting four COG performance variables, namely, total gas yield, carbon conversion efficiency, heating value of product gas, and cold gas efficiency. All the CI-based models exhibit an excellent prediction accuracy and generalization performance. The co-gasification experiments and their modeling presented here for a pilot-plant FBG can be gainfully utilized in the efficient design and operation of the corresponding commercial scale co-gasifiers utilizing high ash coals.

1 aTiwary, Shishir1 aGhugare, Suhas, B.1 aChavan, Prakash, D.1 aSaha, Sujan1 aDatta, Sudipta1 aSahu, Gajanan1 aTambe, Sanjeev, S. uhttps://library.ncl.res.in/content/co-gasification-high-ash-coal%E2%80%93biomass-blends-fluidized-bed-gasifier