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Title: Development of enhanced sulfur rejection processes

Research at Virginia Tech led to the development of two complementary concepts for improving the removal of inorganic sulfur from many eastern U.S. coals. These concepts are referred to as Electrochemically Enhanced Sulfur Rejection (EESR) and Polymer Enhanced Sulfur Rejection (PESR) processes. The EESR process uses electrochemical techniques to suppress the formation of hydrophobic oxidation products believed to be responsible for the floatability of coal pyrite. The PESR process uses polymeric reagents that react with pyrite and convert floatable middlings, i.e., composite particles composed of pyrite with coal inclusions, into hydrophilic particles. These new pyritic-sulfur rejection processes do not require significant modifications to existing coal preparation facilities, thereby enhancing their adoptability by the coal industry. It is believed that these processes can be used simultaneously to maximize the rejection of both well-liberated pyrite and composite coal-pyrite particles. The project was initiated on October 1, 1992 and all technical work has been completed. This report is based on the research carried out under Tasks 2-7 described in the project proposal. These tasks include Characterization, Electrochemical Studies, In Situ Monitoring of Reagent Adsorption on Pyrite, Bench Scale Testing of the EESR Process, Bench Scale Testing of the PESR Process, and Modeling andmore » Simulation.« less
Authors:
; ; ;
Publication Date:
OSTI Identifier:
251649
Report Number(s):
DOE/PC/92246-T8
ON: DE96012301; TRN: 96:003943
DOE Contract Number:
AC22-92PC92246
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: Mar 1996
Research Org:
Virginia Polytechnic Inst. and State Univ., Blacksburg, VA (United States)
Sponsoring Org:
USDOE, Washington, DC (United States)
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; COAL; DESULFURIZATION; PYRITE; REMOVAL; OXIDATION; COAL PREPARATION; ELECTROCHEMISTRY; FLOTATION; POLYMERS; BITUMINOUS COAL; PH VALUE