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The Maturity Estimation of Material Organic in CaCO3 with Determining T max and Energy Activation Using Pyrolysis Method

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Shale material is shale oil that is clay or carbonate material contain excessively immature organic. When heated to a certain temperature, the organic content changed to mature and changed in physics and chemistry, so it can produce energy materials such as oil and gas. The testing of TOC that produced carbonates-organic showed excellent quality as shale oil (TOC ≥ 12.0%). The results of thermogravimetric analysis showed activation energy of carbonates was 749–1339 kJ/mol and the temperature of the reaction process was 75–740 °C. Organic composition that was larger than carbonate can caused a smaller activation energy. The carbonate content of OD7-Asl2 had Ea = 1083.7 kJ/mol smaller than OD7-Asl1 with Ea = 1338.1 kJ/mol. A very large TOC value affected the activation energy to be smaller, as the carbonate of OD7-Asl2 was smaller than OD7-Asl1. The maturity of the OD7-Asl2 shale occurred at T = (380–445) °C, Ea = 1083.7 kJ/mol and Tmax = 415 °C, better than OD7-Asl1. The Rock Eval Pyrolisis test results showed shale carbonate had a high potential to produce oil and gas. Shale material heating result reinforced by FTIR testing that the compounds with specific functional groups apart and a new peak appeared at wavenumber 2900 cm−1 which indicate the presence of hydrocarbons single bonds.

Keywords: Activation Energy; Oil Shale; Pyrolysis; TOC

Document Type: Research Article

Affiliations: Geophysics Engineering, Engineering Faculty, University of Lampung, Bandar Lampung, 35145, Indonesia

Publication date: July 1, 2019

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  • Journal of Computational and Theoretical Nanoscience is an international peer-reviewed journal with a wide-ranging coverage, consolidates research activities in all aspects of computational and theoretical nanoscience into a single reference source. This journal offers scientists and engineers peer-reviewed research papers in all aspects of computational and theoretical nanoscience and nanotechnology in chemistry, physics, materials science, engineering and biology to publish original full papers and timely state-of-the-art reviews and short communications encompassing the fundamental and applied research.
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