Hydrocarbon potential of Pennsylvanian coal in Bohai Gulf Basin, Eastern China, as revealed by hydrous pyrolysis

Li, Rongxi; Kuili, Jin; Lehrmann, Daniel J.

doi:10.1016/j.coal.2007.07.006

Cited by 24 publications

(12 citation statements)

References 30 publications

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“…A total of 92 source rock samples collected from 13 well drilling cores (33 coals, 19 carbonaceous mudstones, and 40 dark mudstones) were tested with a Vinci Technologies Rock-Eval analyzer for pyrolysis analysis, with a procedure similar to that of Espitalié et al The derived parameters of pyrolysis included S 1 (oven kept isothermally at 300 °C) and S 2 (oven temperature increased to 550 °C at intervals of 25 °C/min). The TOC values was measured following Chinese National Standard GB/T 19145-2003 . The samples were then pressed through a 100 μm sieve and heated to 1200 °C, with the carbonates being removed by the application of hydrochloric acid.…”

Section: Methodsmentioning

confidence: 99%

Hydrocarbon-Generating Potential of the Upper Paleozoic Section of the Huanghua Depression, Bohai Bay Basin, China

Zhao¹,

Zhou²,

Pu³

et al. 2018

Energy Fuels

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The origin of the Upper Paleozoic hydrocarbon accumulations in the Huanghua Depression of Bohai Bay Basin was studied by petrography and Rock-Eval pyrolysis on more than 90 coal, dark mudstone, and carbonaceous mudstone samples, with 4 samples of hydrous pyrolysis. Additionally, biomarker analysis of oils produced from the Upper Paleozoic reservoirs were conducted. The source rocks were evaluated for their amounts of type III kerogen and content of hydrogen-rich macerals. The samples can be graded between fair and excellent quality, showing that the source rocks possess good potential for gas and oil generation. The main stage of oil generation occurs around 2600–4000 m [with random vitrinite reflectance (R o) values of 0.7–1.3%], and gas generation happens in a wide depth range (R o up to 2.0%). Hydrous pyrolysis under a closed system exhibits large potential for gas generation, and the dark mudstone can generate 500–1000 mL/g of total organic carbon (TOC) at a temperature between 350 and 550 °C. Coal and carbonaceous mudstone exhibit a clear capacity for oil generation (5–25 mg/g of TOC), with dark mudstone showing the highest values (up to 84 mg/g of TOC at 400 °C). Two categories of crude oils produced from the Upper Paleozoic reservoirs can be recognized, indicating that the oils are mainly migrated from strata. The studied source rocks and its produced oil are of high concentrations of diasterane and gammacerane, Ts < Tm, and Pr/Ph ratios of 1.01–3.44, indicating the input of coaly organic matter under a marine to continental transitional environment. The results illustrate good gas generation and limited oil generation capacity for the Upper Paleozoic source rocks, and more attention should be focused on the natural gas exploration in the study area and also other coal-bearing basins.

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Section: Methodsmentioning

confidence: 99%

Hydrocarbon-Generating Potential of the Upper Paleozoic Section of the Huanghua Depression, Bohai Bay Basin, China

Zhao¹,

Zhou²,

Pu³

et al. 2018

Energy Fuels

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“…The gaseous products were not collected because no significant amount of gas was obtained in the sampling bags. Similarly, Li et al 148 reported the production of gaseous products through hydrous pyrolysis of brown coal at 320°C. The yield of the gaseous product was estimated to be 54.8 kg/ton coal, which tends to increase with increasing temperature.…”

Section: 133mentioning

confidence: 96%

“…The yield of the gaseous product was estimated to be 54.8 kg/ton coal, which tends to increase with increasing temperature. 148 The first full-scale commercial plant of hydrous pyrolysis was established by the Changing World Technologies and the Renewable Environment Solutions LLC (RES) in Carthage, Missouri for conversion of waste into useful chemical commodities (fertilizers, fuels, etc.). RES reported that any type of waste materials, such as plastic waste, sewage waste, and rubbers could be used as feedstock.…”

Section: 133mentioning

confidence: 99%

Potential use of natural rubber to produce liquid fuels using hydrous pyrolysis – a review

2016

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Natural rubber is a tropical plantation crop that mainly consists of hydrocarbon polyisoprene (cis-1,4-polyisoprene). Rubber can be converted through depolymerization into liquid, which can be used as fuels or chemical feedstock. This paper provides information on natural rubber and its alternative sources worldwide. Although we focus on hydrous pyrolysis, we also introduced various depolymerization processes, including pyrolysis, gasification, chemical degradation, catalytic cracking and hydrogenation. Hydrous pyrolysis improves the depolymerization process, such that raw materials can be fed without requiring a drying process. This process can also be conducted at low temperatures, and water can be solely used as reaction medium and can be easily separated from the oil product. This paper also reviews the role of process parameters such as temperature, rubber to water ratio, reaction time, and type of gases on product quality and quantity. Moreover, this study highlights the environmental and economic feasibility of hydrous pyrolysis.

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“…It may be questioned whether the earlier 'rule-ofthumb', which proposed a doubling of a reaction rate coefficient 'P' with a temperature rise of 10K, 3 is able to withstand a closer investigation: Th is has been disproven by later experiments. 10,23,30,146 Another model has been developed according to the kinetic approach of Arrhenius and fitted to experimental data. 128 One of the main assumptions of this model is a constant 'r' (Eqn (2) …”

Section: Temperaturementioning

confidence: 99%

Hydrothermal carbonization of biomass: A summary and discussion of chemical mechanisms for process engineering

Funke

Ziegler

2010

Biofuels Bioprod Bioref

1,608

1,028

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Hydrothermal carbonization can be defined as combined dehydration and decarboxy lation of a fuel to raise its carbon content with the aim of achieving a higher calorific value. It is realized by applying elevated temperatures (180-220 o C) to biomass in a suspension with water under saturated pressure for several hours. With this conversion process, a lignite-like, easy to handle fuel with well-defined properties can be created from biomass residues, even with high moisture content. Thus it may contribute to a wider application of biomass for energetic purposes. Although hydrothermal carbonization has been known for nearly a century, it has received little attention in current biomass conversion research. This review summarizes knowledge about the chemical nature of this process from a process design point of view. Reaction mechanisms of hydrolysis, dehydration, decarboxylation, aromatization, and condensation polymerization are discussed and evaluated to describe important operational parameters qualitatively. The results are used to derive fundamental process design im provements.

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Hydrocarbon potential of Pennsylvanian coal in Bohai Gulf Basin, Eastern China, as revealed by hydrous pyrolysis

Cited by 24 publications

References 30 publications

Hydrocarbon-Generating Potential of the Upper Paleozoic Section of the Huanghua Depression, Bohai Bay Basin, China

Hydrocarbon-Generating Potential of the Upper Paleozoic Section of the Huanghua Depression, Bohai Bay Basin, China

Potential use of natural rubber to produce liquid fuels using hydrous pyrolysis – a review

Hydrothermal carbonization of biomass: A summary and discussion of chemical mechanisms for process engineering

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