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Search results
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2025
Continuous conversion of tall oil over Ni-Cu/SAPO-11 to a sustainable aviation fuel blendstock with excellent seal swelling properties
Umenweke, G. C., Pace, R. B., Metais, M., Heintz, O., Caboche, G. & Santillan-Jimenez, E., Jul 15 2025, In: Fuel. 392, 134695.Research output: Contribution to journal › Article › peer-review
4 Scopus citations -
Electron microbeam investigations of the spent ash from the pilot-scale acid extraction of rare earth elements from a beneficiated Kentucky fly ash
Berti, D., Groppo, J. G., Joshi, P., Preda, D. V., Gamliel, D. P., Beers, T., Schrock, M., Hopps, S. D., Morgan, T. D., Zechmann, B. & Hower, J. C., Apr 17 2025, In: International Journal of Coal Geology. 303, 104738.Research output: Contribution to journal › Article › peer-review
Open Access10 Scopus citations -
One-Pot Synthesis of Sustainable Aviation Fuel from Brown Grease Using Multifunctional Zeolite-Supported Catalysts
Mongelli, C., Umenweke, G., St Clair, T., Caboche, G., Heintz, O., Pace, R. & Santillan-Jimenez, E., Sep 2025, In: Catalysts. 15, 9, 873.Research output: Contribution to journal › Article › peer-review
Open Access -
Petrology and geochemistry of the Middle Pennsylvanian (Langsettian) Clintwood coalbed, Pike County, Kentucky
Hower, J. C., Eble, C. F., Hopps, S. D., Morgan, T. D. & Edwards, V. A., Dec 2025, In: International Journal of Coal Science and Technology. 12, 1, 22.Research output: Contribution to journal › Article › peer-review
Open Access6 Scopus citations -
Probing the Critical Element Chemistry of Coal-Combustion Fly Ash: Examination of Zircon and Associated Minerals from a Beneficiated Kentucky Fly Ash
Berti, D., Groppo, J. G., Joshi, P., Preda, D. V., Gamliel, D. P., Beers, T., Schrock, M., Hopps, S. D., Morgan, T. D., Zechmann, B. & Hower, J. C., May 2025, In: Minerals. 15, 5, 461.Research output: Contribution to journal › Article › peer-review
Open Access1 Scopus citations -
Reductive Depolymerization of Lignin to Aromatic Compounds over Promoted Nickel Catalysts in Sub- and Supercritical Methanol
Parker, J., Santillan-Jimenez, E., Harman-Ware, A. E., Umenweke, G. C., Heintz, O., Caboche, G. & Crocker, M., Jan 2025, In: ChemNanoMat. 11, 1, e202400222.Research output: Contribution to journal › Article › peer-review
Open Access2 Scopus citations -
Robust engineered catalyst for the conversion of brown grease to renewable diesel via decarboxylation/decarbonylation
Umenweke, G. C., Hogston, B., Heintz, O., Caboche, G., Pace, R. B. & Santillan-Jimenez, E., Jun 12 2025, In: Chemical Communications. 61, 58, p. 10784-10787 4 p.Research output: Contribution to journal › Article › peer-review
Open Access2 Scopus citations -
Support Effects on Fe- or Cu-Promoted Ni Catalysts Used in the Catalytic Deoxygenation of Tristearin to Fuel-like Hydrocarbons
Umenweke, G. C., Pace, R., Récalt, T., Heintz, O., Caboche, G. & Santillan-Jimenez, E., May 2025, In: Catalysts. 15, 5, 501.Research output: Contribution to journal › Article › peer-review
Open Access1 Scopus citations -
2024
Optimizing calcination of coal by-products for maximizing REE leaching recovery and minimizing Al, Ca, and Fe contamination
Gupta, T., Nawab, A. & Honaker, R., Jul 2024, In: Journal of Rare Earths. 42, 7, p. 1354-1365 12 p.Research output: Contribution to journal › Article › peer-review
Open Access8 Scopus citations -
Parametric study of an acid baking process for rare earth element recovery from a bituminous-coal source
Nawab, A., Yang, X. & Honaker, R., 2024, In: International Journal of Coal Preparation and Utilization. 44, 8, p. 1130-1154 25 p.Research output: Contribution to journal › Article › peer-review
Open Access1 Scopus citations -
Photothermal self-floating aerogels based on chitosan functionalized with polydopamine and carbon nanotubes for removal of arsenic from wastewater
Khodakarami, M. & Honaker, R., Feb 20 2024, In: Science of the Total Environment. 912, 169519.Research output: Contribution to journal › Article › peer-review
25 Scopus citations -
2023
Design of Multi-Stage Solvent Extraction Process for Separation of Rare Earth Elements
Srivastava, V., Werner, J. & Honaker, R., Sep 2023, In: Mining. 3, 3, p. 552-578 27 p.Research output: Contribution to journal › Article › peer-review
Open Access5 Scopus citations -
Geochemistry of the Leatherwood coal in eastern Kentucky with an emphasis on enrichment and modes of occurrence of rare earth elements
Hower, J. C., Eble, C. F., Johnston, M. N., Ruppert, L. F., Hopps, S. D. & Morgan, T. D., Dec 1 2023, In: International Journal of Coal Geology. 280, 104387.Research output: Contribution to journal › Article › peer-review
Open Access11 Scopus citations -
Microstructural diversity and digestion yields of select bituminous and subbituminous coals as raw material candidates for carbon fiber precursor production
Cakmak, E., Hower, J. C., Mathews, J. P., Weisenberger, M. C., Kaplan, R., Lacy, J., Zhang, Y. & Lara-Curzio, E., Sep 15 2023, In: Fuel. 348, 128545.Research output: Contribution to journal › Article › peer-review
Open Access8 Scopus citations -
Pilot Scale Testing of Lignite Adsorption Capability and the Benefits for the Recovery of Rare Earth Elements from Dilute Leach Solutions
Nawab, A. & Honaker, R., Jul 2023, In: Minerals. 13, 7, 921.Research output: Contribution to journal › Article › peer-review
Open Access4 Scopus citations -
Pretreatment of Bituminous Coal By-Products for the Hydrometallurgical Extraction of Rare Earth Elements
Gupta, T., Nawab, A. & Honaker, R., May 2023, In: Minerals. 13, 5, 614.Research output: Contribution to journal › Article › peer-review
Open Access8 Scopus citations -
Removal of Iron from Pyrite-Rich Coal Refuse by Calcination and Magnetic Separation for Hydrometallurgical Extraction of Rare Earth Elements
Gupta, T., Nawab, A. & Honaker, R., Mar 2023, In: Minerals. 13, 3, 327.Research output: Contribution to journal › Article › peer-review
Open Access10 Scopus citations -
Was coal metamorphism an influence on the minor element chemistry of the Middle Pennsylvanian Springfield (No. 9) coal in Western Kentucky?
Hower, J. C., Groppo, J. G., Eble, C. F., Hopps, S. D. & Morgan, T. D., Jun 1 2023, In: International Journal of Coal Geology. 274, 104295.Research output: Contribution to journal › Article › peer-review
Open Access7 Scopus citations -
2022
An acid baking approach to enhance heavy rare earth recovery from bituminous coal-based sources
Nawab, A., Yang, X. & Honaker, R., Jun 30 2022, In: Minerals Engineering. 184, 107610.Research output: Contribution to journal › Article › peer-review
Open Access22 Scopus citations -
Aspects of rare earth element geochemistry of the Pond Creek coalbed, Pike County, Kentucky
Hower, J. C., Eble, C. F., Hopps, S. D. & Morgan, T. D., Sep 1 2022, In: International Journal of Coal Geology. 261, 104082.Research output: Contribution to journal › Article › peer-review
Open Access31 Scopus citations -
Coal Feed-Dependent Variation in Fly Ash Chemistry in a Single Pulverized-Combustion Unit
Hower, J. C., Groppo, J. G., Hopps, S. D., Morgan, T. D., Hsu-Kim, H. & Taggart, R. K., Sep 2022, In: Minerals. 12, 9, 1071.Research output: Contribution to journal › Article › peer-review
Open Access5 Scopus citations -
Cooperative Brønsted-Lewis acid sites created by phosphotungstic acid encapsulated metal–organic frameworks for selective glucose conversion to 5-hydroxymethylfurfural
Rahaman, M. S., Tulaphol, S., Hossain, M. A., Jasinski, J. B., Sun, N., George, A., Simmons, B. A., Maihom, T., Crocker, M. & Sathitsuksanoh, N., Feb 15 2022, In: Fuel. 310, 122459.Research output: Contribution to journal › Article › peer-review
Open Access45 Scopus citations -
Effect of Pd promotion and catalyst support on the Ni-catalyzed deoxygenation of tristearin to fuel-like hydrocarbons
Wang, F., Pace, R., Ji, Y., Jiang, J., Jiang, X., Krystianiak, A., Heintz, O., Caboche, G., Santillan-Jimenez, E. & Crocker, M., Aug 2022, In: Renewable Energy. 195, p. 1468-1479 12 p.Research output: Contribution to journal › Article › peer-review
18 Scopus citations -
Material Characterization and Physical Processing of a General Type of Waste Printed Circuit Boards
Lin, P., Werner, J., Groppo, J. & Yang, X., Oct 2022, In: Sustainability (Switzerland). 14, 20, 13479.Research output: Contribution to journal › Article › peer-review
Open Access8 Scopus citations -
Parametric study and speciation analysis of rare earth precipitation using oxalic acid in a chloride solution system
Nawab, A., Yang, X. & Honaker, R., Jan 2022, In: Minerals Engineering. 176, 107352.Research output: Contribution to journal › Article › peer-review
Open Access52 Scopus citations -
Petrology and geochemistry of the Fire Clay coalbed, Martin County, Inez 7 ½′ quadrangle, Kentucky, USA
Hower, J. C., Eble, C. F., Hopps, S. D. & Morgan, T. D., Nov 1 2022, In: International Journal of Coal Geology. 263, 104133.Research output: Contribution to journal › Article › peer-review
1 Scopus citations -
Resources from coal beneficiation waste: Chemistry and petrology of the Ayrshire coal tailings ponds, Chandler, Indiana
Xie, P., Liu, J., Fu, B., Newmaster, T. & Hower, J. C., Apr 1 2022, In: Fuel. 313, 123054.Research output: Contribution to journal › Article › peer-review
3 Scopus citations -
Understanding coal quality and the critical importance of comprehensive coal analyses
Hower, J. C., Finkelman, R. B., Eble, C. F. & Arnold, B. J., Nov 1 2022, In: International Journal of Coal Geology. 263, 104120.Research output: Contribution to journal › Review article › peer-review
Open Access83 Scopus citations -
2021
Effects of Treatment Conditions on Pd Speciation in CHA and Beta Zeolites for Passive NOxAdsorption
Pace, R. B., Lardinois, T. M., Ji, Y., Gounder, R., Heintz, O. & Crocker, M., Nov 9 2021, In: ACS Omega. 6, 44, p. 29471-29482 12 p.Research output: Contribution to journal › Article › peer-review
21 Scopus citations