Agnieszka Drobniak

Agnieszka Drobniak
University of Silesia in Katowice · Faculty of Natural Sciences

Doctor of Philosophy

About

90
Publications
12,261
Reads
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2,609
Citations
Citations since 2016
57 Research Items
2006 Citations
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Introduction
Research scientist with 20 years of professional experience working for a state agency and with scientists from all over the world on a variety of collaborative geoscience projects. Founding member of the Centre for Biomass Energy Research and Education.
Additional affiliations
October 2022 - present
University of Silesia in Katowice
Position
  • Research Scientist
Education
October 1997 - January 2002
AGH University of Science and Technology
Field of study
  • Earth Sciences
October 1992 - June 1997
AGH University of Science and Technology
Field of study
  • Geology

Publications

Publications (90)
Article
Full-text available
Concerns about climate change, energy security, and the diversification of energy supplies have made renewable resources increasingly more attractive and important sources of energy. As interest grows, bioenergy (energy from bio-based sources) is becoming more environmentally friendly and economically viable and has started to play a more prominent...
Article
Numerous studies have been conducted to assess air pollution and human health risks arising from exposure to outdoor cooking, but limited standards have been implemented around the world to assure fuel quality. While charcoal briquettes and lumps are a popular fuel choice for grilling, almost no data specifying their properties are available to con...
Article
As the interest in the renewable resources has been increasing worldwide, the wood pellet sector has the potential to become a mainstream fuel of the future in the heat market. This development is especially noted in the European Union countries which consumed 50 % of global wood pellets in 2018. While only about 2 % of the United States energy con...
Article
Full-text available
This study examines Pennsylvanian shales in Indiana as a potential source of selected critical elements: rare earth elements (REE), vanadium (V), zinc (Zn), arsenic (As), and cadmium (Cd). Widespread, organic-matter-rich marine Desmoinesian black shales are the main target, but other discontinuous shale horizons were also sampled in 11 locations. I...
Article
Full-text available
Recent observations have shown the atmospheric greenhouse gas methane (CH 4 ) is consumed by microorganisms (methanotrophs) in caves at rates comparable to CH 4 oxidation in surface soils. Caves are abundant in karst landscapes that comprise 14% of Earth’s land surface area, and therefore may represent a potentially important, but overlooked, CH 4...
Article
Full-text available
This study characterizes Pennsylvanian paleosols from coal-bearing strata in Indiana, with the main emphasis on the abundance and distribution of rare earth elements (REE) and lithium (Li). Eleven locations in southwest Indiana were selected for this study, targeting paleosols of both the Carbondale Group and Raccoon Creek Group. Most paleosols wer...
Article
Rare earth elements and yttrium (REYs) are critical elements and valuable commodities due to their limited availability and high demand in a wide range of applications and especially in high-technology products. The increased demand and geopolitical pressures motivate the search for alternative sources of REYs, and coal, coal waste, and coal ash ar...
Article
Global warming enhances atmospheric moisture loading and will likely affect the East-Asian monsoon system across Vietnam. The absence of a long written climate history from Vietnam creates a reliance on geological archives of past monsoon history and regional paleoenvironmental changes to provide a framework for evaluating current climatic trends....
Article
As concerns about climate change and sustainability rise, biomass utilization has a potential to become one of the pillars of the future energy market. It is therefore critical to assure that solid biomass fuels are of the highest quality and do not contribute to avoidable air pollution. Our research has shown that petrographic analysis of solid bi...
Article
Full-text available
Recent years have witnessed an increasing awareness and interest in rare earth elements (REE). These several, usually unfamiliar elements are key components of countless products used in our daily lives. Because of their use in many modern technologies, including those critical for national security, the demand for REEs grows, and so does their pro...
Article
Full-text available
The quality check of grilling wood pellets should be of a critical importance as smoke from their combustion has a direct contact with food, impacts human safety, and pollutes the atmosphere. Therefore, the main purpose of this study is to investigate the purity of grilling wood pellets and chips available on the market, analyze the properties of t...
Article
Full-text available
This “Atlas of Charcoal-Based Grilling Fuel Components” features compilation of over 620 microscopic images taken between 2019 and 2021 while our team was improving methodology of using reflected light microscopy in identification of charcoal-based grilling fuels constituents. These photomicrographs provide documentation of the composition of the f...
Article
Full-text available
A suite of 72 samples of Illinois Basin coal was collected from 2015 to 2018, from 14 active coal mining and preparation operations in Illinois and Indiana. The goals of the study were to investigate the behavior of trace elements during coal preparation and provide current coal quality data for active mining operations in the Illinois Basin, which...
Article
Full-text available
Concerns about climate change, energy security, and the diversification of energy supplies have made renewable resources increasingly more attractive and important sources of energy. As interest grows, bioenergy (energy from bio-based sources) is becoming more environmentally friendly and economically viable and has started to play a more prominent...
Article
This study contributes long-term (14 to 38 months) experimental evidence for geocatalytically mediated methanogenesis in immature to early mature shale and coal source rocks at temperatures from 80 to 120 °C. Borosilicate glass tubes with pre-outgassed coal and shale source rock chips and water were sealed under vacuum, sterilized, heated isotherma...
Article
Is the signature of the original plant communities preserved in coal, or is that signature overprinted by depositional and diagenetic processes? To address this question, Pennsylvanian coals from the Illinois and Appalachian basins were compared to Cretaceous, Paleocene, and Eocene coals of comparable coalification levels as shown by vitrinite refl...
Article
Researchers at the U.S. Geological Survey (USGS) and their collaborators conducted a study of the geochemical properties of coals currently produced for electric power generation in the Illinois Basin in Illinois and Indiana. The study follows from recommendations by an expert panel for the USGS to investigate the distribution and controls of trace...
Article
The objective of this study was to evaluate rare earth elements and yttrium (REY) concentrations in Pennsylvanian coal-bearing strata in the eastern part of the Illinois Basin (Indiana), specifically targeting coals and marine shales associated with the coals. Samples were collected from several coal mines and three boreholes. In total, 105 samples...
Article
Mercury injection capillary pressure (MICP) analysis was used to study organic-matter-rich Devonian shales varying in maturity from marginally mature to postmature to discuss controls on drainage and imbibition in shale reservoirs. Six samples come from the New Albany Shale; their total organic carbon (TOC) ranged from 3.3 to 8.4% and vitrinite ref...
Article
Global warming enhances atmospheric moisture loading and will likely affect the East-Asian monsoon system across Vietnam. The absence of a long written climate history from Vietnam creates a reliance on geological archives of past monsoon history and regional paleoenvironmental changes to provide a framework for evaluating current climatic trends....
Article
Hydrocarbon gas emissions from active, inactive, and improperly sealed or abandoned oil/gas wells significantly contribute to anthropogenically emitted greenhouse gases, predominantly in the form of methane (CH4). We explored the extent of hydrocarbon gas emissions from 20 active, inactive, plugged and abandoned oil/gas wells in Indiana (USA), wher...
Article
Full-text available
Coal has long been a valuable natural resource in the United States throughout the country’s history. European settlers began to use coal in the late 1740s and, as energy demands increased, coal production climbed from 9.3 million tons in 1850 to 750 million in 1918. Eventually coal replaced wood as the primary energy source, and by the 1940s coal...
Article
The principal purpose of this research is to investigate whether elemental chemistry obtained by a portable X-ray fluorescence (pXRF) analyzer can aid in correlating lithostratigraphic units within the Pennsylvanian coal-bearing sequence of the eastern part of the Illinois Basin in Indiana. The study is based on data collected from four boreholes: I...
Article
This study attempts to advance the understanding of the geometry of the Survant Coal Member of the Linton Formation (Pennsylvanian) in Indiana. We documented variability in the thickness and lateral extent of the coal beds present between the Mecca Quarry Shale Member of the Linton Formation and the Excello Shale Member of the Petersburg Formation—...
Article
Geological hydrocarbon gas seepage is a major global source of atmospheric methane, ethane and propane as greenhouse gases and photochemical pollutants. Natural gas seepage is generally related to faults and associated fracture intensification domains that provide conduits for natural gas from reservoir rocks to migrate upward and enter the atmosph...
Article
This paper investigates chemical functional groups of the two extracted bitumen fractions in shales of the Jurassic to early Cretaceous Vaca Muerta Formation of the Neuquén Basin in Argentina, South America. The results indicate that Bitumen I is strongly aliphatic and appears to be genetically related to fluorescent amorphous organic matter. In co...
Preprint
Full-text available
Methane oxidizing microorganisms (methanotrophs) are a major sink for the greenhouse gas methane (CH 4 ), and have been investigated in several environments. Recent studies show that CH 4 consumption in caves is pervasive and is a result of active methanotrophy. However, little is known about what controls the distribution and abundance of methanot...
Conference Paper
The Illinois Basin is the third largest U.S. coal producing region, after the Powder River and Appalachian Basins. With increased adoption of scrubbers in U.S. coal-fired utilities, the high sulfur content of Illinois Basin coals is no longer an impediment, and this sulfur content allows scrubbers to operate efficiently. Nonetheless, Illinois Basin...
Article
Samples of the low-maturity New Albany Shale (Middle and Upper Devonian to Lower Mississippian) and Mowry Shale (Late Cretaceous), both containing kerogen Type II, and samples of Wilcox Coal (Eocene), containing kerogen Type III, were heated to 60, 100, and 200 °C at hydrostatic ambient pressure, 100, or 300 MPa for 6 or 12 months in sealed glass a...
Article
This paper reviews the significance of solid bitumen with emphasis on source-rock reservoirs. We discuss difficulties and discrepancies with terminology, especially those terms related to the origin of solid bitumen and its physical and chemical properties. Various definitions of solid bitumen have their own justifications and can be used provided...
Article
Low temperature (60 and 100 °C) and long-term (6 months to 5 years) heating of pre-evacuated and sterilized shales and coals containing kerogen Types I (Mahogany Shale), II (Mowry Shale and New Albany Shale), and III (Springfield Coal and Wilcox Lignite) with low initial maturities (vitrinite reflectance Ro 0.39–0.62%) demonstrates that catalytical...
Article
The air in subterranean karst cavities is often depleted in methane (CH4) relative to the atmosphere. Karst is considered a potential sink for the atmospheric greenhouse gas CH4 because its subsurface drainage networks and solution-enlarged fractures facilitate atmospheric exchange. Karst landscapes cover about 14% of earth’s continental surface, b...
Preprint
Full-text available
21 The air in subterranean karst cavities is often depleted in methane (CH4) relative to the 22 atmosphere. Karst is considered a potential sink for the atmospheric greenhouse gas CH4 because 23 its subsurface drainage networks and solution-enlarged fractures facilitate atmospheric exchange. 24 Karst landscapes cover about 14% of earth's continenta...
Preprint
The air in subterranean karst cavities is often depleted in methane (CH4) relative to the atmosphere. Karst is considered a potential sink for the atmospheric greenhouse gas CH4 because its subsurface drainage networks and solution-enlarged fractures facilitate atmospheric exchange. Karst landscapes cover about 14% of earth’s continental surface, b...
Preprint
The air in subterranean karst cavities is often depleted in methane (CH4) relative to the atmosphere. Karst is considered a potential sink for the atmospheric greenhouse gas CH4 because its subsurface drainage networks and solution-enlarged fractures facilitate atmospheric exchange. Karst landscapes cover about 14 % of earth’s continental surface,...
Conference Paper
The Illinois Basin is the third largest producer of U.S. coal, after the Powder River Basin and the Appalachian Basin, respectively. Due to its proximity to U.S. coal-fired power generation and resulting low transportation costs, interest in high sulfur Illinois Basin coals has increased despite an overall decline in U.S coal production resulting f...
Article
Subterranean methanotrophy is a potentially important but overlooked sink for the atmospheric greenhouse gas methane (CH4). This study documents a microbial CH4 sink in tropical subterranean karst cavities in Vietnam's northern karst province where porosity, steep topography, and scarce soil and vegetation cover foster the exchange of subterranean...
Article
This study examines the influence of analytical particle size on the surface area and mesopore and micropore volume data obtained from low-pressure N2 and CO2 adsorption analyses in response to the crushing of coal and shale. Pennsylvanian high-volatile bituminous coal (Ro ~ 0.57%) and Devonian to Lower Mississippian low-maturity (Ro ~ 0.57%) and h...
Article
The coals of the Brazil and the lower part of the Staunton Formations (Atokan and early Desmoinesian, Pennsylvanian) in Indiana (Illinois Basin) are typically thin and discontinuous. As a result, both researchers and the industry have experienced problems with coal bed identification and correlation. The discrepancies in coal nomenclature and frequ...
Article
Sources and sinks of methane (CH4) are critical for understanding global biogeochemical cycles and their role in climate change. A growing number of studies have reported that CH4 concentrations in cave ecosystems are depleted, leading to the notion that these subterranean environments may act as sinks for atmospheric CH4. Recently, it was hypothes...
Preprint
Full-text available
Understanding the sources and sinks of methane (CH4) is critical for predicting and managing global biogeochemical cycles. Recent studies have reported that CH4 concentrations in cave ecosystems are depleted and that these subterranean environments may act as a daily sinks for atmospheric CH4. It has been hypothesized that this CH4 depletion may be...
Article
Coal seam degasification is a means to recover energy from the methane gas retained in coal, and is also a supplementary measure to ventilation, which is proven to be one of the most effective ways to reduce methane emissions to a safe level in coal mines. Reservoir simulation is probably the most effective way to assess the coal seam as a “gas res...
Article
Full-text available
The evolution of porosity in shales with increasing maturity was examined in a suite of five New Albany Shale samples spanning a maturity range from immature (vitrinite reflectance, R-o 0.35%) to postmature (R-o 1.41%). Devonian to lower Mississippian New Albany Shale samples from the Illinois Basin used in this study contain marine type II kerogen...
Article
Natural hydrocarbon gas seeps are surface expressions of Petroleum Seepage Systems, whereby gas is ascending through faults from pressurized reservoirs that are typically associated with sandstones or limestones. A spectacular "eternal flame" in western New York State marks a gas macroseep of dominantly thermogenic origin emanating directly from de...
Article
To determine the possible influence of CO2 on the pore structure and mineralogy of the New Albany Shale (Devonian–Mississippian), experiments were conducted utilizing Indiana shale samples of varying total organic carbon content under various conditions. After the shale samples were heated to as high as 150°C in Teflon-lined high-pressure reaction...
Article
Variations of CO2 emissions upon combustion of the Springfield Coal Member of the Petersburg Formation and Danville Coal Member of the Dugger Formation from Indiana were calculated and discussed. For the Springfield, CO2 emissions range from 71.4 to 98.9 kg/GJ (166.0 to 230.0 lb/106 Btu), having an average value of 86.9 kg/GJ (202.1 lb/106 Btu); fo...
Article
Variations in the relative proportions of individual macerals in shales can significantly influence the geochemical characteristics of bulk organic matter. Density fractions of kerogen from the thermally immature New Albany Shale (Devonian and Mississippian) with contrasting maceral compositions exhibit strong geochemical differences. The parental...
Article
Methane concentrations in caves are comparable to proposed methane concentrations in the martian atmosphere. An open-path laser system could provide accurate and precise groundbased data about methane concentrations on Mars.
Article
This chapter presents the basic concepts of coal petrology and discusses coal parameters that have been noted as potential triggers for spontaneous combustion. Macerals, the microscopically identifiable organic constituents of coal, are one of three basic parameters that define coal. The other two parameters are the coal rank, the measure of metamo...
Chapter
Macerals, the microscopically identifiable organic constituents of coal, are one of three basic parameters that define coal. The other two parameters are the coal rank, the measure of metamorphism of the organic constituents, and the inorganic content of the coal, most visibly seen as the minerals associated with coal. Below we briefly present the...
Article
The distribution of gallium (Ga) and germanium (Ge) was studied in two Pennsylvanian high volatile bituminous coals of Indiana: the Springfield Coal Member of the Petersburg Formation and the Danville Coal Member of the Dugger Formation. Gallium in the Springfield and Danville Coals shows similar ranges, from 1.70 to 8.90ppm (averaging 5.06ppm) for...
Article
Full-text available
This poster was presented at the Eastern Section American Association of Petroleum Geologists (AAPG) conference in Kalamazoo, Michigan, September 25-29, 2010. This study investigates kerogen petrography, gas desorption, geochemistry, and micro- and mesoporosity of the New Albany Shale (Devonian-Mississippian) in the eastern part of the Illinois bas...
Article
As part of the U.S. Department of Energy's Regional Sequestration Partnership program, the potential for sequestering CO2 in the largest bituminous coal reserve in United States – the Illinois Basin – is being assessed at the Tanquary site in Wabash County, southeastern Illinois. To accomplish the main project objectives, which are to determine CO2...
Article
Four lithotypes, vitrain, bright clarain, clarain, and fusain, were hand-picked from the core of the Pennsylvanian Springfield Coal Member (Petersburg Formation) in Illinois. These lithotypes were analyzed petrographically and for meso- and micropore characteristics, functional group distribution using FTIR techniques, and fluidity. High-pressure C...
Article
Full-text available
This poster was presented at the 27th annual meeting of The Society for Organic Petrology, Denver, Colorado, 12-16 September, 2010. Lithotypes from Pennsylvanian high-volatile bituminous coals from the Illinois Basin were isolated by hand and analyzed to investigate the influence of their chemical and petrographic composition on the amount of CO2 e...
Article
This paper investigates changes in the high-volatile bituminous Lower Block Coal Member from Indiana owing to moisture availability and oxidation in air at ambient pressure and temperature over storage time. Specifically, it investigates changes in chemistry, in surface area, and pore structure, as well as changes in methane and carbon dioxide adso...
Article
Changes in high-volatile bituminous coal (Pennsylvanian) near contacts with two volcanic intrusions in Illinois were investigated with respect to optical properties, coal chemistry, and coal pore structure. Vitrinite reflectance (Ro) increases from 0.62% to 5.03% within a distance of 5.5 m from the larger dike, and from 0.63% to 3.71% within 3.3 m...
Chapter
The Illinois Basin (Indiana, Illinois, and western Kentucky) holds substantial Pennsylvanian coal resources of high volatile bituminous rank, but much of this resource is considered to be too deep or too thin for economic mining. Sequestration of CO2 within the unminable parts of these coalbeds is one of the geological options considered for future...