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Determination method for applying demineralized coal to measure forms of sulfur in coal by temperature programming method

A temperature-programmed, measurement method technology, applied in the field of analysis and detection, can solve the problems of large vacuum and high cost

Inactive Publication Date: 2017-04-26
HUANENG POWER INTERNATIONAL +2
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  • Description
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  • Application Information

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Problems solved by technology

XANES requires a larger vacuum and is more expensive

Method used

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  • Determination method for applying demineralized coal to measure forms of sulfur in coal by temperature programming method
  • Determination method for applying demineralized coal to measure forms of sulfur in coal by temperature programming method

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Embodiment Construction

[0017] The implementation of the present invention will be described in detail below in conjunction with the drawings and examples.

[0018] like figure 1 Shown, the present invention uses deashed coal to carry out temperature programming method to measure the assay method of form sulfur in coal, comprises the steps:

[0019] 1. Deash the coal. like figure 2 As indicated, weigh a coal sample with a particle size of less than 100 mesh, add 1 liter of 5 mol / L hydrochloric acid, heat in a constant temperature water bath at 55-60°C for 1 hour, and continue stirring. Then transfer the coal sample to a plastic beaker, add 1 liter of hydrofluoric acid, heat, dissolve, and filter in the same way as above. Then transfer the coal sample to a beaker, add 1 liter of hydrochloric acid, repeat the above-mentioned heating operation in a constant temperature water bath, filter the acid-treated coal sample, wash with distilled water, until the filtrate is detected to be free of chloride io...

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Abstract

The invention discloses a determination method for applying demineralized coal to measure forms of sulfur in coal by a temperature programming method. Coal is first demineralized, a temperature-programmed reduction method or a temperature-programmed oxidation method is then carried out on the demineralized coal, sulfur in the demineralized coal is converted into H2S or SO2, peaks of an H2S or SO2 evolution curve are resolved, and different forms of sulfur contents (including pyritic sulfur, aliphatic sulfur, aromatic sulfur and thiophene) in the coal are then derived reversely. The invention can effectively measure the contents of different forms of sulfur in coal, results are more accurate, and measurement is easy.

Description

technical field [0001] The invention belongs to the technical field of analysis and detection, and in particular relates to a method for measuring morphological sulfur in coal by using a deashed coal to carry out a temperature programming method. Background technique [0002] my country is a country where coal is the main energy source, and coal accounts for 70% of my country's total energy consumption. However, elemental sulfur in coal is an element that is harmful to the environment. Acid rain occurs when sulfur dioxide and sulfur trioxide are released into the atmosphere. Due to the low melting point of some basic metal sulfates, when sulfur-containing gases come into contact with metal surfaces, they will rust or corrode the metal. Some sulfur compounds may be hazardous to the environment, health and safety. At present, the main utilization methods of coal are combustion, pyrolysis, gasification and liquefaction. How to control the emission of sulfur in the process o...

Claims

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Application Information

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IPC IPC(8): G01N5/00G01N27/62
CPCG01N5/00G01N27/62
Inventor 时正海高洪培肖平陈景硕林伟荣王勤辉骆仲泱方梦祥贾鑫
Owner HUANENG POWER INTERNATIONAL
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