|
|
Project Title: Ultra High Temperature Steam Gasification of Wastes, Plastics and Biomass
Principle Investigator(s): Ashwani K. Gupta (Mechanical Eng.)
Abstract: This proposal is directed at basic examination of the ultra high temperature gasification technology to develop and demonstrate the efficient and most effective means of destructing the solid wastes generated onboard the Naval ships into clean hydrogen-rich syngas. The goal is to produce enhanced hydrogen production from wastes and biomass using ultra high temperature gasification of wastes. Normal gasification processes has four distinct reaction zones: drying zone, pyrolysis zone, reduction zone, and oxidation zone. The calculated and experimental results from ultra high temperature gasification of wastes (in excess of 1000oC) using ultra high temperature steam (at low pressure and near supercritical steam temperature) has been shown to provide medium calorific value gas with high hydrogen and CO content, small amounts of hydrocarbons and negligible tars. The waste undergoes endothermic reactions to convert it to clean gaseous fuel with no carbon and flyash carry over from the system. The hydrocarbons in the waste are transformed into ultimate clean hydrogen gas and carbon monoxide fuel. The hydrogen is purified to achieve pure hydrogen gas. The objectives of the UMD experimental program are summarized below:
-
Fundamental database for the development of ultra high temperature steam gasification system for use onboard the navy ships using a laboratory scale facility. The database is obtained using single and mixtures of various solid waste components to simulate the real naval solid wastes.
-
Provide heat thermal and flow balances for a bench scale unit by incorporating realistic fractions of various mixture components in the waste. Calculate the amounts of moisture or water that can be incorporated in the waste stream without any adverse effect on the process performance.
-
Obtain experimental database on several important single components and their mixtures in the waste. Continuous emissions analysis, chemical analysis of the fly ash, and bottom ash as well as the amounts of tars formed will be evaluated.
|
