John and Willie Leone Department of Energy & Mineral Engineering (EME)

  • United States

Research Output 1972 2020

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Article
1988
45 Citations (Scopus)

Effect of oxygen chemisorption on char gasification reactivity profiles obtained by thermogravimetric analysis

Lizzio, A. A., Piotrowski, A. & Radovic, L. R., Dec 1988, In : Fuel. 67, 12, p. 1691-1695 5 p.

Research output: Contribution to journalArticle

Chemisorption
Gasification
Thermogravimetric analysis
Oxygen
Coal
8 Citations (Scopus)

Evaluating Coal Separation Processes

Klima, M. S. & Luckie, P. T., Jan 1 1988, In : Coal Preparation. 6, 1-2, p. 91-101 11 p.

Research output: Contribution to journalArticle

Coal preparation
Coal
coal
Recovery
methodology
4 Citations (Scopus)

Flotation kinetics for titanium, zirconium and bitumen recovery from oilsand tailings

Ityokumbul, M. T., Bulani, W. & Kosaric, N., Jun 1988, In : The Canadian Journal of Chemical Engineering. 66, 3, p. 382-385 4 p.

Research output: Contribution to journalArticle

asphalt
Tailings
Titanium
Flotation
Zirconium
17 Citations (Scopus)

Parameter estimation with simplified boundary conditions

Ityokumbul, M. T., Kosaric, N. & Bulani, W., Jan 1 1988, In : Chemical Engineering Science. 43, 9, p. 2457-2462 6 p.

Research output: Contribution to journalArticle

Parameter estimation
Boundary conditions
Method of moments
22 Citations (Scopus)

PRODUCTION PERFORMANCE ANALYSIS OF HORIZONTAL DRAINAGE WELLS FOR THE DEGASIFICATION OF COAL SEAMS.

Ertekin, T., Sung, W. & Schwerer, F. C., Jan 1 1988, In : JPT, Journal of Petroleum Technology. 40, 5, p. 625-632 8 p.

Research output: Contribution to journalArticle

Boreholes
Drainage
Coal
Mine shafts
Horizontal wells

Study of gas condensation in transmission pipelines using a hydrodynamic model

Mucharam, L. & Adewumi, M. A., Jan 1 1988, In : [No source information available].

Research output: Contribution to journalArticle

Condensation
Hydrodynamics
condensation
Pipelines
hydrodynamics
54 Citations (Scopus)

Vibrationally mediated photodissociation

Likar, M. D., Baggott, J. E., Sinha, A., Ticich, T. M., Vander Wal, R. L. & Crim, F. F., 1988, In : Journal of the Chemical Society, Faraday Transactions 2: Molecular and Chemical Physics. 84, 9, p. 1483-1497 15 p.

Research output: Contribution to journalArticle

Photodissociation
photodissociation
Photons
Molecules
fragments
1987
12 Citations (Scopus)

A boundary element‐finite element procedure for porous and fractured media flow

Elsworth, D., Jan 1 1987, In : Water Resources Research. 23, 4, p. 551-560 10 p.

Research output: Contribution to journalArticle

Insulator Elements
fractured medium
porous medium
turbulent flow
nonlinearity

An analysis of air volume-flowrate determinations for mines

Kohler, J. L. & Thimons, E. D., Nov 1987, In : Mining Science and Technology. 6, 1, p. 17-29 13 p.

Research output: Contribution to journalArticle

ventilation
Ventilation
air
health and safety
Air
Oil wells
multiphase flow
Multiphase flow
Oil fields
Tubing
18 Citations (Scopus)

COMPOSITE SYSTEM SOLUTION IN ELLIPTIC FLOW GEOMETRY.

Obut, S. T. & Ertekin, T., Sep 1 1987, In : SPE Formation Evaluation. 2, 3, p. 227-238 12 p.

Research output: Contribution to journalArticle

Large scale systems
Geometry
Enhanced recovery
Hydraulics
Fluids
4 Citations (Scopus)

EOR WITH PENN STATE SURFACTANTS.

Arf, T. G., LaBelle, G., Klaus, E. E., Duda, J. L., Nagarajan, R., Biterge, M. B. & Ertekin, T., Jan 1 1987, In : SPE Reservoir Engineering (Society of Petroleum Engineers). 2, 2, p. 166-176 11 p.

Research output: Contribution to journalArticle

Surface-Active Agents
Feedstocks
Surface active agents
Hydrocarbons
Oils
5 Citations (Scopus)

Location strategy for methane, air velocity, and carbon monoxide fixed-point mine-monitoring transducers

Cohen, A. F., Fisher, T. J., Watson, R. A. & Kohler, J. L., Jan 1 1987, In : IEEE Transactions on Industry Applications. IA-23, 2, p. 375-381 7 p.

Research output: Contribution to journalArticle

Carbon monoxide
Transducers
Methane
Monitoring
Sensors

Maximum demand and demand factors in underground coal mining

Croyle, F. D., Kohler, J. L. & Bise, C. J., 1987, In : IEEE Transactions on Industry Applications. IA-23, 6, p. 1105-1111 7 p.

Research output: Contribution to journalArticle

Coal mines
Electric rates
Cables
Temperature
Hot Temperature
2 Citations (Scopus)

Process control of heavy-media systems for coal-preparation plants

Kohler, J. L., Sottile, J. & Placha, D. S., 1987, In : IEEE Transactions on Industry Applications. IA-23, 2, p. 382-388 7 p.

Research output: Contribution to journalArticle

Coal preparation
Process control
Coal
Control equipment
Density (specific gravity)
2 Citations (Scopus)

Sensitive dc ground fault relays for coal mines

Yenchek, M. R., Trutt, F. C., Kohler, J. L., Morley, L. A. & Novak, T., Jan 1 1987, In : IEEE Transactions on Industry Applications. IA-23, 4, p. 736-741 6 p.

Research output: Contribution to journalArticle

Coal mines
Signal systems
Electric instrument transformers
Sensors
23 Citations (Scopus)

Sulfur tolerance of methanol synthesis catalysts: Modelling of catalyst deactivation

Radovic, L. R. & Vannice, M. A., Jan 1 1987, In : Applied Catalysis. 29, 1, p. 1-20 20 p.

Research output: Contribution to journalArticle

Catalyst deactivation
Methanol
Sulfur
Catalysts
Catalyst poisoning
25 Citations (Scopus)

Two-color vibrationally mediated photodissociation of nitric acid

Sinha, A., Vander Wal, R. L., Butler, L. J. & Crim, F. F., Jan 1 1987, In : Journal of physical chemistry. 91, 18, p. 4645-4647 3 p.

Research output: Contribution to journalArticle

Photodissociation
Nitric Acid
nitric acid
Nitric acid
photodissociation
1986
39 Citations (Scopus)
Insulator Elements
Flow simulation
fissure
fluid flow
Flow of fluids
31 Citations (Scopus)

A model to evaluate the transient hydraulic response of three‐dimensional sparsely fractured rock masses

Elsworth, D., Jan 1 1986, In : Water Resources Research. 22, 13, p. 1809-1819 11 p.

Research output: Contribution to journalArticle

fissure
hydraulics
rock
transient flow
fluid flow
9 Citations (Scopus)

An interpolation methodology for washability data

Klima, M. S. & Luckie, P. T., Jan 1 1986, In : Coal Preparation. 2, 3, p. 165-177 13 p.

Research output: Contribution to journalArticle

interpolation
Interpolation
Ashes
methodology
Sulfur
30 Citations (Scopus)
Boreholes
Rocks
Geometry
Surface roughness
Steady flow
32 Citations (Scopus)

Carbonization of coker feedstocks and their fractions

Eser, S., Jenkins, R. G., Derbyshire, F. J. & Malladi, M., Jan 1 1986, In : Carbon. 24, 1, p. 77-82 6 p.

Research output: Contribution to journalArticle

Petroleum
Carbonization
Coke
Feedstocks
Crude oil
55 Citations (Scopus)
Hydraulic conductivity
Surface roughness
Rocks
Shear strength

Comment on "On Euler's theorem for homogeneous functions and proofs thereof"

Adewumi, M. A., Dec 1 1986, In : Journal of Chemical Education. 63, 7, 1 p.

Research output: Contribution to journalArticle

5 Citations (Scopus)

Decision functions for electric power system signals

Kohler, J. L., Trutt, F. C. & Morley, L. A., Jan 1 1986, In : Electric Power Systems Research. 11, 2, p. 167-169 3 p.

Research output: Contribution to journalArticle

Electric power systems
Deterioration
216 Citations (Scopus)

DYMNAMIC GAS SLIPPAGE: A ULNIQUE DUAL-MECHANISM APPROACH TO THE FLOW OF GAS IN TIGHT FORMATIONS.

Ertekin, T., King, G. R. & Schwerer, F. C., Feb 1 1986, In : SPE Formation Evaluation. 1, 1, p. 43-52 10 p.

Research output: Contribution to journalArticle

Flow of gases
Gases
Fick's laws
Porous materials
Computer simulation
4 Citations (Scopus)

FACTORS AFFECTING THE RECOVERY OF HEAVY MINERALS FROM OILSAND TAILINGS BY FLOTATION.

Ityokumbul, M. T., Kosaric, N., Bulani, W. & Cairns, W. L., Jan 1 1986, In : Water pollution research journal of Canada. 21, 1, p. 21-32 12 p.

Research output: Contribution to journalArticle

Tailings
heavy mineral
Flotation
tailings
Minerals
33 Citations (Scopus)

Gasification reactivity of Chilean coals

Garcia, X. & Radovic, L. R., Jan 1 1986, In : Fuel. 65, 2, p. 292-294 3 p.

Research output: Contribution to journalArticle

Coal
Gasification
Chemisorption
Oxygen
Bearings (structural)
121 Citations (Scopus)

NUMERICAL SIMULATION OF THE TRANSIENT BEHAVIOR OF COAL-SEAM DEGASIFICATION WELLS.

King, G. R., Ertekin, T. & Schwerer, F. C., Jan 1 1986, In : SPE Formation Evaluation. 1, 2, p. 165-183 19 p.

Research output: Contribution to journalArticle

Coal
Flow of water
Computer simulation
Porosity
Gases
46 Citations (Scopus)

PARAMETRIC STUDY OF THE EFFECTS OF COAL SEAM PROPERTIES ON GAS DRAINAGE EFFICIENCY.

Remner, D. J., Ertekin, T., Sung, W. & King, G. R., Nov 1 1986, In : SPE Reservoir Engineering (Society of Petroleum Engineers). 1, 6, p. 633-646 14 p.

Research output: Contribution to journalArticle

Coal
Drainage
Gases
Desorption
Water
1 Citation (Scopus)

REVIEW OF THE APPLICATION OF CLAY IN THE DRILLING FLUIDS.

Sharma, V. P., Laik, S. & Srinivasan, S., Sep 1 1986, In : Research and Industry. 31, 3, p. 230-235 6 p.

Research output: Contribution to journalArticle

Drilling fluids
Clay
Fluids
Water
Drilling
23 Citations (Scopus)

Two-dimensional steady state hydrodynamic analysis of gas-solids flow in vertical pneumatic conveying systems

Adewumi, M. A. & Arastoopour, H., Jan 1 1986, In : Powder Technology. 48, 1, p. 67-74 8 p.

Research output: Contribution to journalArticle

Flow of solids
Conveying
Pneumatics
Hydrodynamics
Gases
11 Citations (Scopus)

Using model discrimination to select a mathematical function for generating separation curves

Klima, M. S. & Luckie, P. T., Jan 1 1986, In : Coal Preparation. 3, 1, p. 33-47 15 p.

Research output: Contribution to journalArticle

Coal
bypass
refuse
Separators
cyclone
15 Citations (Scopus)
Roofs
Tunnels
1985
81 Citations (Scopus)

Combined effects of inorganic constituents and pyrolysis conditions on the gasification reactivity of coal chars

Radovic, L. R., Steczko, K., Walker, P. L. & Jenkins, R. G., Jun 1985, In : Fuel processing technology. 10, 3, p. 311-326 16 p.

Research output: Contribution to journalArticle

calcium acetate
Coal
Gasification
Ion exchange
Pyrolysis
146 Citations (Scopus)

EFFECT OF CAPILLARY NUMBER AND ITS CONSTITUENTS ON TWO-PHASE RELATIVE PERMEABILITY CURVES.

Fulcher, R. A., Ertekin, T. & Stahl, C. D., Jan 1 1985, In : JPT, Journal of Petroleum Technology. 37, 2, p. 249-260 12 p.

Research output: Contribution to journalArticle

Fluids
Surface tension
Enhanced recovery
Viscosity
Regression analysis
2 Citations (Scopus)

Measurement of air velocity in mines.

Thimons, E. D. & Kohler, J. L., Jan 1 1985, In : [No source information available].

Research output: Contribution to journalArticle

Anemometers
anemometers
Smoke
air
smoke
2 Citations (Scopus)
Conveying
Two phase flow
Pneumatics
Flow of solids
Gases
9 Citations (Scopus)

TWO-PHASE PRESSURE DROP IN HORIZONTAL PIPELINES.

Adewumi, M. A. & Bukacek, R. F., Apr 1 1985, In : Journal of pipelines. 5, 1, p. 1-14 14 p.

Research output: Contribution to journalArticle

Pressure drop
Pipelines
Gas pipelines
Gas oils
Liquids
1984
58 Citations (Scopus)

Catalytic coal gasification: use of calcium versus potassium

Radovic, L. R., Walker, P. L. & Jenkins, R. G., Jul 1984, In : Fuel. 63, 7, p. 1028-1030 3 p.

Research output: Contribution to journalArticle

Coal gasification
Potassium
Calcium
Coal
Aluminosilicates
Coal combustion
Coal
Carbon
Gases
Coal liquefaction
4 Citations (Scopus)

NON-ITERATIVE APPROACH TO MINE POWER-SYSTEM ANALYSIS.

Trutt, F. C. & Kohler, J. L., 1984, In : Conference Record - IAS Annual Meeting (IEEE Industry Applications Society). p. 113-116 4 p.

Research output: Contribution to journalArticle

Systems analysis
System buses
Electric potential
Electric network analysis

PERFORMANCE EVALUATION OF AN ENTRAINED SOLIDS-FED PNEUMATIC CENTRIFUGAL CLASSIFIER.

Klima, M. S. & Luckie, P. T., Aug 1 1984, In : Minerals and Metallurgical Processing. 1, 2, p. 121-125 5 p.

Research output: Contribution to journalArticle

Pneumatics
Classifiers
air
bypass
Air
40 Citations (Scopus)

Reactivities of chars obtained as residues in selected coal conversion processes

Radovic, L. R. & Walker, P. L., Jan 1984, In : Fuel processing technology. 8, 2, p. 149-154 6 p.

Research output: Contribution to journalArticle

Coal
Arrhenius plots
Activation energy
Temperature
Processing
1983
112 Citations (Scopus)

Effect of lignite pyrolysis conditions on calcium oxide dispersion and subsequent char reactivity

Radović, L. R., Walker, P. L. & Jenkins, R. G., Feb 1983, In : Fuel. 62, 2, p. 209-212 4 p.

Research output: Contribution to journalArticle

Coal
Lignite
Lime
Pyrolysis
Gasification
4 Citations (Scopus)

GENERATION OF ULTRALOW TENSIONS OVER A WIDE EACN RANGE USING PENNSYLVANIA STATE U. SURFACTANTS.

Klaus, E. E., Jones, J. H., Nagarajan, R., Ertekin, T., Chung, Y. M., Arf, G., Yarzumbeck, A. J. & Dudenas, P., Jan 1 1983, In : Society of Petroleum Engineers journal. 23, 1, p. 73-80 8 p.

Research output: Contribution to journalArticle

Surface active agents
Ethers
Olefins
Crude oil
Sulfonation
1 Citation (Scopus)

IMPORTANCE OF ACTIVE SITES IN COAL CHAR AND CARBON GASIFICATION.

Radovic, L. R., Walker, P. L. & Jenkins, R. G., Mar 1983, In : American Chemical Society, Division of Petroleum Chemistry, Preprints. 28, 3, p. 816 1 p.

Research output: Contribution to journalArticle

Gasification
Coal
Carbon
450 Citations (Scopus)

Importance of carbon active sites in the gasification of coal chars

Radović, L. R., Walker, P. L. & Jenkins, R. G., Jul 1983, In : Fuel. 62, 7, p. 849-856 8 p.

Research output: Contribution to journalArticle

Coal
Gasification
Carbon
Pyrolysis
Soot
190 Citations (Scopus)

Importance of catalyst dispersion in the gasification of lignite chars

Radovic, L. R., Walker, P. L. & Jenkins, R. G., Jan 1 1983, In : Journal of Catalysis. 82, 2, p. 382-394 13 p.

Research output: Contribution to journalArticle

lignite
gasification
Coal
Lignite
Gasification