Dependence of coal liquefaction behaviour on coal characteristics. 5. Data from a continuous flow reactor

Given, P.H.; Schleppy, Ronald; Sood, A. K.

doi:10.1016/0016-2361(80)90248-3

Cited by 30 publications

(4 citation statements)

References 2 publications

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“…The atomic ratios of HI and OI are also considered for assessment of hydrocarbon potential, maturity, kerogen types, and nature (Fisher et al 1942;Tissot and Welte, 1984;Van Krevelen 1993). The highvolatile bituminous coals carrying vitrinite reflectance ranging from 0.49 to 1.02% and reactive macerals value >70% are most feasible for liquid hydrocarbon generation (Given et al 1975(Given et al , 1980Singh et al 2013). Panwar et al (2019) in their report concluded that most of the bituminous coal samples are perhydrous in nature; however, some samples also come in the bright band of Seyler's chart (Cornelius, 1978).…”

Section: Introductionmentioning

confidence: 99%

Pyrolytic and provenance evaluation of organic matter from the tertiary niger delta basin, nigeria: implication on hydrocarbon generation.

Uzoegbu¹,

Obaje²,

Omang³

2023

Glo Jnl Geo Sci

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The present work deals with evaluation of organic matter based on detailed Rock-Eval pyrolysis techniques studies to evaluate hydrocarbon generation potential of source rocks by collecting twenty- nine shale samples from well cuttings in the Tertiary Formations of the Niger Delta, Nigeria. The values of vitrinite reflectance (0.57–0.74%Ro) and maximum (Tmax: 420–445°C) confirmed that samples are at early maturity to matured stage enough to generate liquid and gaseous hydrocarbon. The cross-plot between hydrogen index (HI) and oxygen index (OI) atomic ratio indicates that samples were predominant in the bituminous rank and having kerogen Type III makes it suitable for hydrocarbon generation. Rock-Eval pyrolysis analysis (Types II-III and Type III kerogen) on shale samples from the Niger Delta reveals organic matter of predominantly terrestrial origin based on type III kerogen. The organic matter (OM) assemblages suggests a marine setting but dominated by terrestrial inputs likely related to fluvial processes which is function of most delta system. Based on high total organic carbon (TOC) value of 5.42wt% and Type III kerogen made the shale an excellent source rock, with gas-prone kerogen. The high OI, low total sulphur (TS) suggests terrestrially derived OM and deposition in an oxic and dysoxic shallow marine environment. In addition, HI and Tmax values describe the samples as a characteristic Type III dominant kerogen and potential to generate oil and gases while the Tmax, consistently indicate an immature to mature on the shale organic matter.

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Section: Introductionmentioning

confidence: 99%

Pyrolytic and provenance evaluation of organic matter from the tertiary niger delta basin, nigeria: implication on hydrocarbon generation.

Uzoegbu¹,

Obaje²,

Omang³

2023

Glo Jnl Geo Sci

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“…Brown coals may be successfully converted into distillable products. Such studies have been carried out by the US Bureau of Mines (Given et al, 1979;Given et al, 1980). Contributions on the influence of rank and composition on the liquefaction behavior of coal have been made by Graham and Skinner (1929), Fisher et al (1943), Wu and Storch (1968), Gorin (1981), Singh (2012), Singh andSingh (1994a, 1994b), and Singh et al (2013).…”

Section: Introductionmentioning

confidence: 99%

“…There exists an inverse relation between carbon content of coal and its conversion to distillable liquids as advocated by Storch (1937). High volatile coals ( R max = 0.49−1.02%) having reactive macerals (RM) (vitrinite + liptinite) more than 70% were proved to be most ideal for liquefaction (Davis et al., 1976; Given et al., 1975; Given et al., 1979; Given et al., 1980). Thus, understanding of thermal maturity of organic matter is important in order to decipher its potential utilization.…”

Section: Introductionmentioning

confidence: 99%

Studies on thermal maturity and hydrocarbon potential of lignites of Bikaner–Nagaur basin, Rajasthan

Singh

Rajak

Singh

et al. 2016

Energy Exploration & Exploitation

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In the present investigation, an attempt has been made to study lignite samples from the working mines of Bikaner-Nagaur basin of Rajasthan with reference to their maturity and their hydrocarbon potential. The study has been made on the basis of petrological and geochemical characteristics. The assessments made through the empirically derived equations have been cross-checked and correlated with the rock-eval data. The study reveals that the low rank coals of BikanerNagaur basin contain mainly kerogen type-III organic matter and are dominantly composed of huminite (77-87%) with small concentrations of liptinite (4-11%) and inertinite (2-14%), which are worth liquefying to obtain liquid oil and gas. Further, the high conversion factor (93-95%) and high oil yield (63-65%) make them industrially significant, considering the vast lignite resource of the region.

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“…However, liptinite and vitrinite group of maceral has higher hydrocarbon generation potential than inertinite group of maceral (Zhong and Qin, 1995). The high-volatile bituminous coals carrying vitrinite reflectance ranging from 0.49 to 1.02% and reactive macerals value >70% are most feasible for liquid hydrocarbon generation (Given et al 1975(Given et al , 1980Singh et al 2013). Panwar et al (2019) in their report concluded that most of the bituminous coal samples are per-hydrous in nature; however, some samples also come in the bright band of Seyler's chart (Cornelius, 1978).…”

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confidence: 99%

Characterization of Organic Matter from Bituminous Coals of Lafia-Obi, Middle Benue Trough, Nigeria

Uzoegbu¹,

Ugwueze²,

Nwosu³

2021

jasem

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The present work deals with a study based on the geochemical techniques such as biomarkers, Rock-Eval pyrolysis, and detailed petrographic study to evaluate hydrocarbon generation potential of coal by collecting nine coal and carbonaceous shale samples from boreholes in Awgu Formation of Middle Benue Trough, Nigeria. The values vitrinite reflectance (0.94–1.15%VR) and Tmax (446–469°C) confirmed that samples are matured enough to generate liquid and gaseous hydrocarbon in coal. The coal samples also contain sufficient quantity of vitrinite and liptinite macerals varying from 70.28% to 74.10 wt%, which confirm the production of liquid hydrocarbon. The cross-plot between H/C and O/C atomic ratio indicates that samples were predominant in the bituminous rank and having kerogen Type III makes it suitable for hydrocarbon generation. Similar results were found in Rock-Eval pyrolysis analysis (Types II-III and Type III kerogen). The homohopane index (C35/C31 - C35) and homohopane ratio (C35αβS/C34αβS) range from 0.02 to 0.12 and 0.15 to 0.92 indicates oxic condition during organic matter deposition from Lafia-Obi samples. The Moretane/Hopane, Hopane/Hopane + Moretane, Ts/Ts + Tm, 22S/22S + 22RC32homohopane ratios range from 0.06 to 0.14; 0.88 to 0.94; 0.34 to 0.66; and 0.53 to 0.62 and 20S/20S+20R and αββ/αββ+ααα C29 ratios range from 0.43 to 0.58 and 0.42 to 0.55 indicate samples ar e within the late oil window/gas phase. Plots of 22S/22S+22R C32hopanes against C29αββ/αββ+ααα steranes show that Lafia-Obisamples are thermally mature.

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Dependence of coal liquefaction behaviour on coal characteristics. 5. Data from a continuous flow reactor

Cited by 30 publications

References 2 publications

Pyrolytic and provenance evaluation of organic matter from the tertiary niger delta basin, nigeria: implication on hydrocarbon generation.

Pyrolytic and provenance evaluation of organic matter from the tertiary niger delta basin, nigeria: implication on hydrocarbon generation.

Studies on thermal maturity and hydrocarbon potential of lignites of Bikaner–Nagaur basin, Rajasthan

Characterization of Organic Matter from Bituminous Coals of Lafia-Obi, Middle Benue Trough, Nigeria

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