The overall strategy for this project is to allow for the earliest startup with a minimum of up front costs attributed to plant modifications. The plan is to implement only those modifications that are required in order that the plant can be operated in an integrated continuous manner and defer other modifications that will improve plant operation until needed. The necessary modifications are those affecting the operation of the vacuum filters and the evaporator that are critical to integrated operation. Analysis of the data from the one week of continuous around-the-clock testing plant showed 87% SO{sub 2} reduction and 93% ash removal while retaining 30% volatiles content. However, problems with filtration during the June test run (high level of coal fines) indicated that there was evidence that the Pittsburgh coal in our inventory might be weathered. Coal sample analysis showed an increase in sulfate sulfur and a decrease in heating value, also indicative weathering. TRW is proceeding with obtaining fresh coal to avoiding the problems associated with weathering. Approximately 4420 gallons of liquid wastes were shipped off-site for disposal during this reporting period. TRW is making plans to dispose of the remaining liquids and coal/caustic solids from the previous program. …

Radian Corporation was contracted to investigate duct injection and ESP phenomena in a 1.7 MW pilot plant constructed for this test program. This study was an attempt to resolve problems found in previous studies and answer remaining questions for the technology using an approach which concentrates on the fundamental mechanisms of the process. The goal of the study was to obtain a better understanding of the basic physical and chemical phenomena that control: (1) the desulfurization of flue gas by calcium-based reagent, and (2) the coupling of an existing ESP particulate collection device to the duct injection process. Process economics are being studied by others. (VC)

This project is designed to develop methods for precombustion coal remediation by implementing recent advances in enzyme biochemistry. The novel approach of this study is incorporation of hydrophilic oxidative enzymes in reverse micelles in an organic solvent. Enzymes from commercial sources or microbial extracts are being investigated for their capacity to remove organic sulfur from coal by oxidation of the sulfur groups, splitting of C-S bonds and loss of sulfur as sulfuric acid (Figure 1). Dibenzothiophene (DBT) and ethylphenylsulfide (EPS) are serving as models of organic sulfur-containing components of coal in initial studies. A goal of this project is to define a reverse micelle system that optimizes the catalytic activity of enzymes toward desulfurization of model compounds and ultimately coal samples. 12 refs., 2 figs., 7 tabs.

The Coal Distribution report provides information on coal production, distribution, and stocks in the United States to a wide audience including Congress, Federal and State agencies, the coal industry, and the general public. The data in this report are collected and published by the Energy Information Administration (EIA) to fulfill its data collection and dissemination responsibilities as specified in the Federal Energy Administration Act of 1974 (Public Law 93-275, Sections 5 and 13, as amended). This issue presents information for January through June 1991. Coal distribution data are shown (in Tables 1--34) by coal-producing Sate of origin, consumer use, method of transportation, and State of destination. All data in this report were collected by the EIA on Form EIA-6, Coal Distribution Report.'' A copy of the form and the instructions for filing appear in Appendix B. All data in this report for 1991 are preliminary. Data for previous years are final. 6 figs., 34 tabs.

Calculations have been performed to determine the reactivity worth of various partial rod movements to be performed in the K-14 Startup and Power Ascension Test Program. Some tests have been revised since the issuance of the predictions and acceptance criteria for the startup/power ascension testing procedure, RSP 90-007. The tests were modified to account for changes in the Technical Specifications concerning control rod positioning. This addendum describes the changes to the test configurations and documents the revised expectation values for the partial rod insertion tests. Additional calculations were performed to cover the complete range of possible full rod positions at the zero power testing level.

Radian Corporation was contracted to investigate duct injection and ESP phenomena in a 1.7 MW pilot plant constructed for this test program. This study was an attempt to resolve problems found in previous studies and answer remaining questions for the technology using an approach which concentrates on the fundamental mechanisms of the process. The goal of the study was to obtain a better understanding of the basic physical and chemical phenomena that control: (1) the desulfurization of flue gas by calcium-based reagent, and (2) the coupling of an existing ESP particulate collection device to the duct injection process. Process economics are being studied by others. (VC)

The temperature of a char particle burning in an oxygen containing atmosphere is the product of a strongly coupled balance between particle size and physical properties, heat transfer from the particle, surface reactivity, CO/CO{sub 2} ratio and gas phase diffusion in the surrounding boundary layer and within the particle. CO{sub 2}/CO ratios can be strongly influenced by catalytic material in the carbon and by the char temperature. In this program we are measuring the CO{sub 2}/CO ratio for both catalyzed and uncatalyzed chars over a wide range of temperature. These results will then be used to develop predictive models for char temperature and burning rates. The electrodynamic balance has been successfully used to make such measurements for single 200 {mu}m spherocarb particles. This work has been previously reported (progress reports 1 and 2). The electrodynamic balance has been rebuilt to improve its performance including: (1) Better control of gas flow and composition, (2) High pressure operation capability, (3) Advanced imaging system for size measurement and position determination (4) Capability of high and low temperature measurement, (5) Better position control, (6) Fast computation and memory facilities, (7) Better laser power control. In this report, progress on the calibration of the imaging …

Calculations have been performed to determine the reactivity worth of various partial rod movements to be performed in the K-14 Startup and Power Ascension Test Program. Some tests have been revised since the issuance of the predictions and acceptance criteria for the startup/power ascension testing procedure, RSP 90-007. The tests were modified to account for changes in the Technical Specifications concerning control rod positioning. This addendum describes the changes to the test configurations and documents the revised expectation values for the partial rod insertion tests. Additional calculations were performed to cover the complete range of possible full rod positions at the zero power testing level.