MINIMIZATION OF NO EMISSIONS FROM MULTI-BURNER COAL-FIRED BOILERS

PDF Version Also Available for Download.

Description

During the last reporting period the experimental setup in the University of Utah Laminar-Flow Drop Tube was modified to allow for batch experiments. This modification was made in order to guarantee complete conversion of the char in the reactor. Once the setup was optimized, the effect of particle size, oxygen concentration, type of char and NO bulk concentration on the conversion of char-N to NO was evaluated. In this report, we present the results obtained for different chars and for different NO background concentrations. The effect of oxygen and particle size is currently being analyzed and will be presented in ... continued below

Physical Description

24 pages

Creation Information

Eddings, E.G.; Molina, A.; Pershing, D.W.; Sarofim, A.F.; Davis, K.A.; Fletcher, T.H. et al. June 1, 2001.

Context

This report is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. More information about this report can be viewed below.

Who

People and organizations associated with either the creation of this report or its content.

Sponsor

Publishers

Provided By

UNT Libraries Government Documents Department

Serving as both a federal and a state depository library, the UNT Libraries Government Documents Department maintains millions of items in a variety of formats. The department is a member of the FDLP Content Partnerships Program and an Affiliated Archive of the National Archives.

Contact Us

What

Descriptive information to help identify this report. Follow the links below to find similar items on the Digital Library.

Description

During the last reporting period the experimental setup in the University of Utah Laminar-Flow Drop Tube was modified to allow for batch experiments. This modification was made in order to guarantee complete conversion of the char in the reactor. Once the setup was optimized, the effect of particle size, oxygen concentration, type of char and NO bulk concentration on the conversion of char-N to NO was evaluated. In this report, we present the results obtained for different chars and for different NO background concentrations. The effect of oxygen and particle size is currently being analyzed and will be presented in the final report. Experiments were performed with three different carbonaceous materials and were conducted at temperatures close to that of pulverized combustion conditions (1700 K) in a laminar drop tube reactor under inert and oxidizing atmospheres. The results obtained show that the process of NO reduction on the char surface plays an important role on the total amount of char-N converted to NOx. This effect tends to reduce as the NO background concentration is reduced and doesn't seem to strongly depend on the nature of the char. Some of these results were presented at the 2nd Joint Meeting of the US Sections of the Combustion Institute, held in March of 2001. In addition to the experimental observations on char-N conversion to NO, a single particle model was developed and the predictions of the model were compared with the experimental results. Although the model predicts the linear reduction on the conversion of char-N to NO, it overpredicts the general value. A higher value for the rate of NO destruction on char surface doesn't seem to explain this phenomenon, which may be more related to the availability of char surface for the destruction of NO.

Physical Description

24 pages

Notes

OSTI as DE00786861

Source

  • Other Information: PBD: 1 Jun 2001

Language

Item Type

Identifier

Unique identifying numbers for this report in the Digital Library or other systems.

  • Report No.: FG26-97FT97275--06
  • Grant Number: FG26-97FT97275
  • DOI: 10.2172/786861 | External Link
  • Office of Scientific & Technical Information Report Number: 786861
  • Archival Resource Key: ark:/67531/metadc723272

Collections

This report is part of the following collection of related materials.

Office of Scientific & Technical Information Technical Reports

What responsibilities do I have when using this report?

When

Dates and time periods associated with this report.

Creation Date

  • June 1, 2001

Added to The UNT Digital Library

  • Sept. 29, 2015, 5:31 a.m.

Description Last Updated

  • March 22, 2016, 6:09 p.m.

Usage Statistics

When was this report last used?

Yesterday: 0
Past 30 days: 0
Total Uses: 3

Interact With This Report

Here are some suggestions for what to do next.

Start Reading

PDF Version Also Available for Download.

Citations, Rights, Re-Use

Eddings, E.G.; Molina, A.; Pershing, D.W.; Sarofim, A.F.; Davis, K.A.; Fletcher, T.H. et al. MINIMIZATION OF NO EMISSIONS FROM MULTI-BURNER COAL-FIRED BOILERS, report, June 1, 2001; Pittsburgh, Pennsylvania. (digital.library.unt.edu/ark:/67531/metadc723272/: accessed August 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.