Genesis and energy significance of natural hydrogen

Unconventional Resources Pub Date : 2023-01-01 DOI:10.1016/j.uncres.2023.01.002

Jiayi Liu , Quanyou Liu , Huiyuan Xu , Qian Ding , Dongya Zhu , Qingqiang Meng

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引用次数: 3

Abstract

H₂ is clean energy and an important component of natural gas. Moreover, it plays an irreplaceable role in improving the hydrocarbon generation rate of organic matter and activating ancient source rocks to generate hydrocarbon in Fischer-Tropsch (FT) synthesis and catalytic hydrogenation. Compared with hydrocarbon reservoir system, a complete hydrogen (H₂) accumulation system consists of H₂ source，reservoirs and seal. In nature, the four main sources of H₂ are hydrolysis, organic matter degradation, the decomposition of substances such as methane and ammonia, and deep mantle degassing. Because the complex tectonic activities, the H₂ produced in a geological environment is generally a mixture of various sources. Compared with the genetic mechanisms of H₂, the migration and preservation of H₂, especially the H₂ trapping, are rarely studied. A necessary condition for large-scale H₂ accumulation is that the speed of H₂ charge is much faster than diffusion loss. Dense cap rock and continuous H₂ supply are favorable for H₂ accumulation. Moreover, H₂O in the cap rock pores may provide favorable conditions for short-term H₂ accumulation.

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天然氢的成因及能源意义

H2是清洁能源，也是天然气的重要组成部分。此外，在费托合成和催化加氢中，它对提高有机质的生烃率、活化古烃源岩生烃具有不可替代的作用。与油气藏系统相比，一个完整的储氢系统由氢源、储层和盖层组成。在自然界中，H2的四个主要来源是水解、有机物降解、甲烷和氨等物质的分解以及深地幔脱气。由于构造活动复杂，地质环境中产生的H2通常是各种来源的混合物。与H2的遗传机制相比，H2的迁移和保存，特别是H2的捕获，很少被研究。大规模H2积累的必要条件是H2充电的速度比扩散损失快得多。致密的盖层和连续的H2供应有利于H2的积累。此外，盖层孔隙中的H2O可以为短期H2积累提供有利条件。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Unconventional Resources

CiteScore

4.10

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0.00%

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