Role of fly ash in heavy metal removal from flue gas. Final report, September 1, 1993--August 31, 1994
- Ohio State Univ., Columbus, OH (United States)
The primary objective of this work is to study the fundamental phenomena involved in the sorption of trace chalcophilic elements by fly ash at high and medium temperatures. Chalcophiles are the low-boiling trace elements that are volatilized during pulverized coal combustion and are transferred to the gas phase, e.g., As, Pb, Cd and Se. The main focus of this work is investigating the sorption phenomena of a representative chalcophile, arsenic (As) on fly ashes at temperatures representative of the upper-furnace region (850--1200{degree}C) and the economizer section (375--600{degree}C). Arsenic is chosen because it is a highly toxic chalcophile and shows some affinity for fly ash but is also emitted from the stack as vapor and aerosol particles. The two temperature zones have been chosen because most of the dry-sorbent injection technologies are being developed for application in these two regions. Also, various fly ash samples from different sources are being studied because their chemical composition and subsequently their chemical sorption characteristics would show a great deal of variation depending on their source. In the first year of this project, it was proposed to conduct isothermal sorption experiments in a differential reactor system. The first year`s work was divided into two phases; namely (1) design, construction, testing and trouble-shooting of the differential reactor assembly and the analytical instrumentation, and, (2) designing experiments and conducting sorption studies in the differential reactor system.
- Research Organization:
- Ohio Coal Development Office, Columbus, OH (United States)
- Sponsoring Organization:
- Ohio State Government, Columbus, OH (United States)
- OSTI ID:
- 67253
- Report Number(s):
- OCDO-95010710; ON: TI95010710
- Resource Relation:
- Other Information: PBD: Feb 1995
- Country of Publication:
- United States
- Language:
- English
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