Asset Details
Do you wish to reserve the book?
Isotope Rollover of Gaseous Hydrocarbons Induced by Water Pressure in Laboratory Pyrolysis Experiments: Insights into the Influence of Pressure on Carbon Kinetic Isotope Effects During Methane Generation
Hey, we have placed the reservation for you!
By the way, why not check out events that you can attend while you pick your title.
Oops! Something went wrong.
Looks like we were not able to place the reservation. Kindly try again later.
Are you sure you want to remove the book from the shelf?
Isotope Rollover of Gaseous Hydrocarbons Induced by Water Pressure in Laboratory Pyrolysis Experiments: Insights into the Influence of Pressure on Carbon Kinetic Isotope Effects During Methane Generation
Do you wish to request the book?
Isotope Rollover of Gaseous Hydrocarbons Induced by Water Pressure in Laboratory Pyrolysis Experiments: Insights into the Influence of Pressure on Carbon Kinetic Isotope Effects During Methane Generation
Please be aware that the book you have requested cannot be checked out. If you would like to checkout this book, you can reserve another copy
We have requested the book for you!
Your request is successful and it will be processed during the Library working hours. Please check the status of your request in My Requests.
Oops! Something went wrong.
Looks like we were not able to place your request. Kindly try again later.
Journal Article
Isotope Rollover of Gaseous Hydrocarbons Induced by Water Pressure in Laboratory Pyrolysis Experiments: Insights into the Influence of Pressure on Carbon Kinetic Isotope Effects During Methane Generation
2022
Overview
Stable carbon isotope (δ
13
C) rollover of natural gas has attracted recent attention due to its association with highly productive shale gas. However, the mechanistic causes of δ
13
C rollover are not fully understood. In this investigation, pyrolysis was carried out using calcareous shale and carbonaceous mudstone under high water pressure (WP) (i.e., 5 × 10
6
–1.2 × 10
8
Pa). It was found that WP induced the isotope rollover of gaseous hydrocarbons. For both sapropelic and humic organic matter, the δ
13
C rollover of CH
4
(methane), C
2
H
6
(ethane), and C
3
H
8
(propane) occurred when the WP ranged from 3.25 × 10
7
to 1.2 × 10
8
Pa. This result can be explained by high WP conditions retarding oil cracking, and enhancing hydrocarbon expulsion and oil generation. The promotion of oil generation resulted in increasing trends of vitrinite reflectance, and inhibition of gaseous hydrocarbons generation resulted in decrease in δ
13
C
1
values with increase in WP. Good functions were found between water pressure and the calculated carbon kinetic isotope effect (KIE) for
12
CH
4
and
13
CH
4
produced from sapropelic and humic organic matter. Further calculations showed that the increments of activation volume (
Δ
V
12
CH
4
‡
–
Δ
V
13
CH
4
‡
) were linearly correlated with the kinetic isotope effect of methane (
Δ
KIE
) produced from sapropelic and humic organic matter, indicating that WP may affect the KIE of
12
CH
4
and
13
CH
4
by changing the
Δ
V
‡
of
12
CH
4
and
13
CH
4
. Overall, these findings suggest that WP affects the carbon isotope fractionation of gaseous hydrocarbons due to the different thermodynamic properties of
12
CH
4
and
13
CH
4
.
Publisher
Springer US,Springer Nature B.V
