A three-dimensional model of a circulating fluidized bed gasifier was developed, which uses continuous radial profiles of velocities and solids hold-up with regard to the description of fluid mechanics. A complex reaction network of sewage sludge gasification is included in the model. In the simulation calculations the influence of the axial location and the number of feeding points was examine...

Biomass, mainly in the form of wood, is the oldest form of energy used by humans. Gasification is a process of conversion of solid carbonaceous fuel into combustible gas by partial combustion. In the present study, a model developed by us in our earlier study is used for predicting the steady-state composition and rate of reaction profiles for the reduction zone of the downdraft biomass gasifie...

The efficient use of renewable energy is receiving more and attention in the context “carbon neutrality” peaking”. For a long time, biomass has been used less efficiently as source, but with development fluidized gasification technology, it can play an increasing role industrial production. A bed gasifier strong nonstationary process due to its complex energy–mass exchange, analysis reaction pr...

Crops can also be grown for energy could produced in large quantities, and likely to become the most popular future. One of widely used renewable source heating is biomass form fuel wood, charcoal, agriculture residues etc. A lab model Fluidized Bed Gasifier (FBG) handling low density leafy materials like rice husk, saw dust, bagasse, tree leaves was developed. The performance study gasifier de...

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 ...

A most widespread method for coal gasification is the use of fluidized bed reactors. A new concept in recirculating fluidized bed gasification is the Judd twocompartment gasifier. The two compartments provide separated zones for gasification with steam and for combustion with air, within the same vessel. The circulation of inert solids transmits the heat from the combustion zone into the gasifi...