Startup Design of Biomass Gasification Reactors

As a fundamental step for open and closed-loop design and operation, the problem of designing the initial temperature profile for the startup operation of a spatially distributed throated gasifier (described by 10 to 20 nonlinear ordinary and partial differential equations) so that the high energetic yield steadystate is robustly reached is addressed. The problem is solved with efficient partial-to-ordinary differential equation discretization and approximation of the initial torch-induced temperature profile with a rectangular one with: (i) the same sensible heat content (area) as the torch one, and (ii) the pulse start-endheight triplet as design degree of freedom. A sampled search yields the start-end-height triplet that describes the experimental data and explains the manufacturer’s specifications and operation guide, systematizing (with scalability) the startup operation.