Grantee Research Project Results

A Novel Method for Simultaneous SO2/N2O Control in Coal Combustion

EPA Contract Number: 68D40051
Title: A Novel Method for Simultaneous SO2/N2O Control in Coal Combustion
Investigators: Wojtowicz, Marek
Small Business: Advanced Fuel Research Inc.
EPA Contact: Richards, April
Phase: I
Project Period: September 1, 1994 through March 1, 1995
Project Amount: $54,916
RFA: Small Business Innovation Research (SBIR) - Phase I (1994) RFA Text |  Recipients Lists
Research Category: SBIR - Air Pollution , Small Business Innovation Research (SBIR) , Air Quality and Air Toxics

Description:

The great advantage of fluidized-bed combustion is low NOx and low-SOx operation. This is off-set by high N2O emission levels and fairly high solid-waste generation. The latter problem is caused mainly by poor calcium utilization during sulfur capture by limestone of dolomite. A novel method is proposed for simultaneous SOx and N2O control with improved calcium utilization (from the current maximum 25% up to expected 75%). The method is based on the injection of organic calcium/magnesium salt solutions into the combustion. This is followed by in-situ water evaporation, decomposition of the salts, and formation of cenospheres of highly porus CaO/MgO-based sorbent. The objective of the Phase I research is to demonstrate experimentally the effectiveness of the method in terms of:

1. the efficiency of simultaneous sulfur capture and N2O destruction; and
   
2. high calcium utilization.

This will be accomplished in four tasks:

1. Modification of the experimental set-up;
   
2. Optimization of sorbent properties;
   
3. Experimental study of SO2/N2O control; and
   
4. Process evaluation.

The superiority of the proposed approach with respect to limestone/dolomite injection will also be demonstrated.

Supplemental Keywords:

Coal Combustion, Fluidized-Bed Combustion, Pollution Control, SOx, N2O, NOx., Sustainable Industry/Business, RFA, Air, Scientific Discipline, Toxics, Technology for Sustainable Environment, Chemical Engineering, Engineering, Chemistry, Sustainable Environment, HAPS, Environmental Chemistry, Engineering, Chemistry, & Physics, VOCs, air toxics, exploratory air engineering, Environmental Engineering, nitrous oxide, sulfur dioxide (SO2), nitrogren oxides (NOx), sulfer oxide, Sulfur Oxides (SO2), Nitrogen Oxides, Nox, combustion, coal combustion, Sulfur dioxide

Progress and Final Reports:

Final