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Petroleum Science >2011,??Issue 2:??134-142 DOI: https://doi.org/10.1007/s12182-011-0126-0

Mechanism of catalytic hydropyrolysis of sedimentary organic matter with MoS2 Open?Access

文章信息

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作者：He Kun,Zhang Shuichang,Mi Jingkui,Chen Jianping and Cheng Lei
作者單位：

Petroleum Geology Research and Central Laboratory, Research Institute of Petroleum Exploration and Development (RIPED), PetroChina, Beijing 100083, China; CNPC Key Laboratories for Petroleum Geochemistry, Beijing 100083, China;Petroleum Geology Research and Central Laboratory, Research Institute of Petroleum Exploration and Development (RIPED), PetroChina, Beijing 100083, China;CNPC Key Laboratories for Petroleum Geochemistry, Beijing 100083, China;Petroleum Geology Research and Central Laboratory, Research Institute of Petroleum Exploration and Development (RIPED), PetroChina, Beijing 100083, China; CNPC Key Laboratories for Petroleum Geochemistry, Beijing 100083, China;Petroleum Geology Research and Central Laboratory, Research Institute of Petroleum Exploration and Development (RIPED), PetroChina, Beijing 100083, China; CNPC Key Laboratories for Petroleum Geochemistry, Beijing 100083, China;Petroleum Geology Research and Central Laboratory, Research Institute of Petroleum Exploration and Development (RIPED), PetroChina, Beijing 100083, China; CNPC Key Laboratories for Petroleum Geochemistry, Beijing 100083, China

投稿時(shí)間：2010-07-16
引用方式：He, K., Zhang, S., Mi, J. et al. Pet. Sci. (2011) 8: 134. https://doi.org/10.1007/s12182-011-0126-0

文章摘要

MoS2 was used as an efficient catalyst for hydropyrolysis (Hypy) of three samples of sedimentary organic matter with different maturities. Through comparison with Soxhlet extraction (SE),it was found that MoS2 catalytic Hypy can remarkably promote the yields of total chloroform extracts,saturates, aromatics, hopanes and steranes. In addition, the difference of biomarker parameters indicated that isomerization of covalently-bound biomarkers is much more difficult than their free counterparts. Meanwhile, the high conversion of total organic carbon (TOC) in MoS2 catalytic Hypy of organic matter proved that the presence of dispersed molybdenum sulfi de accelerated the breaking of C-C bonds and the release of hydrocarbons. To address the catalytic mechanism, a series of control experiments based on free Hypy and catalytic Hypy were conducted. The results showed that the calculated atomic ratio of carbon conversion/hydrogen conversion for catalytic Hypy was much larger than the presumed value of 1/2, indicating that intensive hydrogenation took place and significantly influenced the distribution of liquid products. Analysis of stable hydrogen isotope data, infrared spectra and m/z 83 ion chromatograph of the saturate fraction further confirmed this hypothesis. The difference of S content changing (ΔS) between catalyst-free Hypy and catalytic Hypy, and the thermal characteristics of the catalyst, indicated that active H2S was defi nitely generated and it probably initiated free radical reactions in the early stage of hydropyrolysis of organic matter.

關(guān)鍵詞

    Catalytic hydropyrolysis, molybdenum disulfide, kerogen, coal, Soxhlet extraction, biomarkers