Kerogen chemistry. 8. Hydrous pyrolysis of rundle kerogen : Source of the oxygen in CO2 and mineral catalysis
Kerogen chemistry. 8. Hydrous pyrolysis of rundle kerogen : Source of the oxygen in CO2 and mineral catalysis
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DOI：
10.1021/ef050237m
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发表时间：
2006
期刊：
影响因子：
5.3
通讯作者：
J. Larsen;J. Hu
中科院分区：
文献类型：
--
作者：
J. Larsen;J. Hu
使条状页岩和条状干酪根在含水热解条件下反应，并测量所形成的CO 2 和羧酸的量。当页岩反应时由干酪根形成的CO 2 的量超过当分离的干酪根反应时形成的CO 2 的量，证明矿物相参与反应。从 Siskin 的工作中可以得知干酪根的化学成分。干酪根（除黄铁矿外无矿物）在325℃反应过程中形成的CO 2 可能完全来自于干酪根。当页岩发生反应时，情况并非如此。对于干酪根在350℃下的反应，CO 2 和羧酸产物中的所有氧不太可能都来自于干酪根。当干酪根进一步用CrCl 2 脱矿质时，形成的CO 2 量减少。当将FeS、FeS 2 和Fe 2 O 3 的混合物添加到油母岩中时，CO 2 的形成增加。矿物质在水合热解反应中发挥作用。从这些数据中无法确定这种作用是催化作用还是作为氧化还原缓冲剂直接参与。
Rundle shale and rundle kerogen were reacted under hydrous pyrolysis conditions and the formed amounts of CO 2 and carboxylic acids were measured. The amount of CO 2 formed from kerogen when the shale is reacted exceeds that formed when the isolated kerogen is reacted, demonstrating involvement of the mineral phase in the reaction. The chemical composition of the kerogen is known from Siskin's work. It is possible that the CO 2 formed during the reaction of kerogen (no mineral except pyrite) at 325 °C comes entirely from the kerogen. This is not true when the shale is reacted. For the reaction of kerogen at 350 °C, it is unlikely that all of the oxygen in the CO 2 and carboxylic acid products is derived from the kerogen. When the kerogen was further demineralized with CrCl 2 , the amount of CO 2 formed decreased. When a mixture of FeS, FeS 2 , and Fe 2 O 3 was added to the kerogen, CO 2 formation increased. Minerals play a role in hydrous pyrolysis reactions. It cannot be decided from these data whether this role is catalytic or direct involvement as a redox buffer.