It is desirable to exploit biomass energy along with coal and petcoke through gasification, and understanding the differences between petroleum coke (petcoke), coal and biomass gasification behaviour becomes very essential. Consequently, present investigation compares gasification components of petcoke, sawdust and high ash coal with their physico-chemical properties under isothermal conditions in CO₂ atmosphere in the temperature range of 1173–1623 K. Physico-chemical characterisation includes proximate and ultimate analyses, porous structure analysis by Brunauer-Emmett-Teller (BET) surface area from nitrogen (N₂) adsorption isotherm, ash composition analysis and ash fusion temperature. The effects of temperature and nature of different solid fuels on gasification reactivity have been discussed. Gasification kinetics has been investigated using two nth-order kinetic models, such as homogeneous model (HM) and shrinking core model (SCM). Influence of diffusion resistance on gasification behaviour of different solid fuels is also reported. Thus, the present study will be helpful to realise the effects of high ash in gasification behaviour as well as in designing and modelling of the suitable gasifier and to establish optimum gasification conditions for petcoke, biomass and high ash coal.

期望通过气化利用生物质能以及煤和石油焦，并且理解石油焦（石油焦），煤和生物质气化行为之间的差异变得非常重要。因此，目前的研究比较了石油焦，锯末和高灰煤的气化成分及其在等温条件下在1173–1623 K温度范围内的CO ₂气氛下的理化性质。理化特性包括近距离分析和最终分析，多孔结构氮（N ₂）通过Brunauer-Emmett-Teller（BET）表面积进行的分析）吸附等温线，灰分组成分析和灰熔融温度。讨论了温度和不同固体燃料的性质对气化反应性的影响。气化动力学已经使用两个n阶动力学模型进行了研究，例如均质模型（HM）和收缩核模型（SCM）。还报道了扩散阻力对不同固体燃料的气化行为的影响。因此，本研究将有助于实现高灰分对气化行为的影响，以及对合适的气化炉的设计和建模，以及为石油焦，生物质和高灰分煤建立最佳气化条件。