This review critically examines char conversion kinetics in oxidizing or reducing atmosphere. In kinetic analysis the devolatilization of biomass and the conversion of char are usually investigated by means of separate experiments, although some kinetic models are also available of biomass combustion. The large majority of the char conversion kinetics consists of a global reaction with activati...

Conversion of biomass into biofuels (gaseous and liquid fuels) can be achieved primarily by biochemical and thermochemical processes [2]. Although biochemical technologies are well developed and widely used for biofuels production [3], however, the types of biomass can be used are limited. Thermochemical gasification appears to be a promising technology that can exploit the embedded energy with...

The flash ironmaking process is a novel technology; the direct use of biomass as reductant and fuel in this can take full advantage heat syngas produced during gasification. This study establishes three-dimensional computational fluid dynamics model that incorporates turbulent flow, mass transfer, transfer to describe complex gas-particle reaction behavior hematite reduction-biomass steam gasif...

Coffee Cut-Stems (CCS) are an abundant wood waste in Colombia obtained generally from crops renovation. However these residues are used directly in combustion processes for heating and cooking in coffee farms where their energy efficiency is very low. In the present work, an energy and environmental assessments for two energy production processes (ethanol fermentation and gasification) using CC...

A model for pressurised steam/O2-blown fluidised-bed gasification of biomass with catalytic reforming of hydrocarbons and tars was developed using Aspen Plus simulation software. Seven main blocks were used to model the fluidised-bed gasifier and two for the catalytic reformer. Modelling blocks were complemented with FORTRAN subroutines to simulate the observed non-equilibrium behaviour of the ...

Renewable biomass and biomass derived fuels could readily replace fossil fuels in many of the present energy utilization applications with concomitant environmental benefits. Gasification is a form of biomass energy conversion producing a fuel that could substitute for fossil fuels in high efficiency power generation and CHP applications. While fossil fuel resources are heavily concentrated in ...