Mineral carbonate looping reactor for ventilation air methane mitigation

A technology of carbonate minerals and reactors, which is applied in the direction of gas emission, mining equipment, chemical instruments and methods, etc., and can solve the problems of unrealistic commercial application, high material volume, low adsorption degree, etc.

Active Publication Date: 2016-07-13
NEWCASTLE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the very low degree of adsorption and the very high amount of material required make commercial application of these options impractical

Method used

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  • Mineral carbonate looping reactor for ventilation air methane mitigation
  • Mineral carbonate looping reactor for ventilation air methane mitigation
  • Mineral carbonate looping reactor for ventilation air methane mitigation

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Embodiment Construction

[0035] The present invention is a new VAM destruction technology, which adopts the technology called "carbonate mineral circulation reactor (MCLR)" or "rock dust circulation reactor (SDLR)". The invention can be operated at a lower cost due to the low operating temperature. Moreover, an advantage of the present invention is that by capturing the by-product CO 2 To further reduce emissions, but in the current VAM application or destruction technology, due to CO 2 Concentrations in the VAM exhaust flue gas stream are very low and thus are not captured. The MCLR / SDLR approach presented here can be illustrated by reactions 1 and 2 below.

[0036]

[0037] MCO 3 →MO+CO 2 (2)

[0038] Reaction 1 is called combustion + carbonation, where mineral / oxide minerals (MO) react with the VAM stream to form carbonate minerals. This reaction is exothermic and releases energy. The reaction has been found to proceed at temperatures below the autoignition temperature of methane. This m...

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Abstract

A method and apparatus for removing methane from ventilation air in a mining situation is provided by a carbonation reactor CAR (1) which reacts a ventilation air methane stream VAR with a carbon dioxide scavenger to form a mineral carbonate which is passed to a calcination reactor CAL (2) in which a regeneration reaction decomposes the mineral carbonate back to a mineral or mineral oxide. Additional heat may be added to the CAL (2) by steam (7), solar energy (6) or by burning drainage gas, natural gas, or coal. Steam or supercritical fluid given off by the CAR (1) can be utilized for heating, cooling, or energy generation. The carbon dioxide scavenger can be any metal, metal oxide, mineral or mineral waste having a carbonation tendency, used in the process referred to as "Mineral Carbonate Looping Reactor" (MCLR), or can be stone dust from the mining site used in the process referred to as "Stone Dust Looping Reactor" (SDLR).

Description

technical field [0001] This invention relates to the removal of draft methane (also known as vent methane or vent gas) using a Mineral Circulation Reactor (MLR) or Rock Dust Circulation Reactor (SDLR), and has been designed not only for coal mine methane in ventilation streams, but also for CO capture 2 , thereby reducing emissions. Background technique [0002] The annual global exhaust gas is more than 237 million tons of carbon dioxide equivalent. About 10% of these emissions are in Australia. Consequently, many countries, including Australia, are formulating emission reduction policies or accelerating technological transformation to reduce emissions from methane released as low-concentration exhaust gas (VAM) during coal mining. There are a number of technologies available that can reduce VAM emissions, including the applicant's own chemical recycling of VAM, which is the subject of International Patent Application PCT / AU2012 / 001173 (published as WO2013 / 044308), which...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/34E21F7/00B01D53/72B01D53/46B01J8/00
CPCE21F7/00B01D53/81B01D2253/1124B01D2257/7025B01D2258/06Y02C20/20B01D53/72B01D53/62B01D2251/404B01D2251/602
Inventor K·V·沙阿B·莫格塔德瑞E·多鲁德奇
Owner NEWCASTLE UNIV
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