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: Air Quality and Air Toxics , SBIR - Air Pollution , Small Business Innovation Research (SBIR)


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., RFA, Scientific Discipline, Air, Toxics, Sustainable Industry/Business, Chemical Engineering, exploratory air engineering, air toxics, Sustainable Environment, Environmental Chemistry, Chemistry, HAPS, VOCs, Technology for Sustainable Environment, Engineering, Environmental Engineering, Engineering, Chemistry, & Physics, nitrous oxide, Nitrogen Oxides, Nox, nitrogren oxides (NOx), Sulfur dioxide, sulfur dioxide (SO2), fluidized bed combustion, combustion, coal combustion, sulfer oxide

Progress and Final Reports:

  • Final