Study on Kinetics of Straw Stalk Gasification in CO₂ with Random Pore Model

Abstract

The gasification of straw stalk in CO2 environment was studied by isothermal thermogravimetric analysis. The characteristics of rice straw and maize stalk gasification at different temperatures were examined under CO2 atmosphere. The relationship between reaction time and carbon conversion of two biomass chars was analyzed by the random pore model (RPM), and compared with the simulation of the shrinking core reaction model (SCRM). The results show that the random pore model is better to predict the experimental data at different temperatures. This means that the characteristics of pore structure for the influence of biomass chars gasification is well reflected by parameter ψ used in RPM. It indicates that the RPM can be applied to the comprehensive simulation of biomass chars gasification in CO2 environment.

Multiscale Modeling of Lignocellulosic Biomass Thermochemical Conversion Technology: An Overview on the State-of-the-Art

“…They concluded that the random pore model had advantages in describing the gasification process of the biomass semichars. Fei and his collaborators also reached a similar conclusion during studying the straw stalk gasification in CO 2 .…”

A Review of Technical and Economic Aspects of Biomass Briquetting

“…These resources are used as fuel, directly or indirectly, avoiding needless burning, burying, or storage [44][45][46], but can also cause extensive environmental pollution when used inefficiently [20,47]. In comparison to other renewable energy options, several studies noted that biomass is abundant in supply from various sources and its energy has the key advantages of being nearly carbon neutral [48][49][50]. The carbon neutrality of biomass resources is dependent on the net CO 2 equivalent greenhouse gases (GHGs) emitted across the entire life cycle processes considered [51], which also involves the emissions generated during the manufacturing and transport phases.…”