A methane sensor for high-pressure hydrothermal system and its preparation method

Abstract

The invention discloses a methane sensor for a high-pressure hydrothermal system and a manufacturing method of the methane sensor. The sensor comprises a base, a circular-truncated-cone-shaped high-temperature-resistant insulated taper pad, a high-temperature-resistant insulated taper sleeve, circular-truncated-cone-shaped high-temperature-resistant ceramic, circular-truncated-cone-shaped solid electrolyte ceramic, a spongy active electrode, a spongy inert electrode, a spongy inert metal layer, an inert metal piece, an electrode lead and the like, wherein the parts are combined into a conical self-tightening sealing mechanism; compared with existing various methane sensors, the manufactured methane sensor has the advantages of simple structure, high selectivity, high response speed, stable and reliable performance and the like, can be used for in-situ measurement of methane fugacity in a high-temperature and high-pressure hydrothermal system such as a crater on a seabed, hydrothermal fluid spouts and the like, provides a technological support for exploration of natural gas hydrate resources on the seabed and can also be applied to other high-temperature (300DEG C-700 DEG C) high-pressure (normal pressure-100 MPa) hydrothermal environments requiring on-site detection of methane gas.

Description

technical field [0001] The present invention relates to a CH 4 A chemical sensor, in particular relates to a methane sensor that can be used in a high-pressure hydrothermal system and a preparation method thereof. Background technique [0002] With the rapid growth of the global economy, people's demand for energy such as oil and natural gas is increasing. In the context of the depletion of land oil and gas resources, all coastal countries are focusing on the development of marine resources. Marine oil and gas resources, especially natural gas hydrate resources, will be the focus of future exploration and development of oil and gas resources in the world. In gas hydrates, there are twice as many methane reserves as the proven reserves of coal, oil, and natural gas combined. The research on gas hydrate is still mainly in the exploration stage in the world. Scientific researchers are actively trying to use various measurement methods to find natural gas hydrates and detect ...

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a methane sensor for high-pressure hydrothermal system and its preparation method, so as to solve the problems existing in the prior art when the temperature and pressure are respectively 300-700°C and 30-100°C. Working in a high-pressure hydrothermal environment of MPa, and the problems of low precision and unstable performance

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