کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8910751 | 1637926 | 2018 | 52 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Catalytic generation of methane at 60-100â¯Â°C and 0.1-300â¯MPa from source rocks containing kerogen Types I, II, and III
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
ژئوشیمی و پترولوژی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Catalytic generation of methane at 60-100â¯Â°C and 0.1-300â¯MPa from source rocks containing kerogen Types I, II, and III Catalytic generation of methane at 60-100â¯Â°C and 0.1-300â¯MPa from source rocks containing kerogen Types I, II, and III](/preview/png/8910751.png)
چکیده انگلیسی
In stark contrast to the earlier findings of hydrogen isotopic exchange between water and thermogenic methane in hydrous pyrolysis experiments above 300â¯Â°C, the hydrogen isotopic composition of added water exerted limited influence on the δ2H value of methane generated catalytically at low temperatures. We hypothesize that the catalytic sites responsible for methanogenesis are located in hydrophobic microenvironments with limited access to water. The δ13CCH4 values of methane generated catalytically at 60-100â¯Â°C range from â¼â57.6 to â41.4â° and are thus similar to typical thermogenic methane (δ13CCH4 >â50â°) and microbially generated methane (<â55â°). Future studies need to evaluate the possibility that clumped isotope characteristics of catalytically generated methane can diagnose the low-temperature regime of catalytic methanogenesis. Furthermore, testing of freshly cored anoxic rocks is needed to determine whether the use of archived, oxygen-exposed rocks in geochemical maturation/catalysis studies introduces artifacts in experimental hydrocarbon yields.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Geochimica et Cosmochimica Acta - Volume 231, 15 June 2018, Pages 88-116
Journal: Geochimica et Cosmochimica Acta - Volume 231, 15 June 2018, Pages 88-116
نویسندگان
Lin Wei, Arndt Schimmelmann, Maria Mastalerz, Richard W. Lahann, Peter E. Sauer, Agnieszka Drobniak, Dariusz StrÄ
poÄ, Frank D. Mango,