Method of making hydrogen containing gas using lignite and peat

A technology of hydrogen gas and lignite, which is applied in the field of producing hydrogen-containing gas from lignite and peat, can solve the problems of increasing equipment and investing in land for lignite utilization, and achieves the effects of short residence time, fast reaction speed and low energy consumption

Inactive Publication Date: 2005-06-08
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Obviously this adds additional equipment and investment and land occupation for lignite utilization

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Pulverize Xiaolongtan lignite with a water content of 14.8% to 0.25-0.40mm, and add the pulverized lignite, calcium oxide and water into the high-pressure reactor according to the weight ratio of water to lignite of 5:1 and the weight ratio of CaO:coal of 0.1:1 , under a nitrogen atmosphere, the reaction temperature reached the set reaction temperature of 550°C at a heating rate of 15°C / min. After the reaction pressure reached 33Mpa, the timing reaction was started. After 5 minutes of reaction, stop heating, remove the reactor, and force the air Cool to room temperature. Gas-liquid products are separated. The gas products are measured by the saturated salt water drainage method, and the permanent gas and hydrocarbon gas chromatographic analysis is carried out. The liquid phase oil-water emulsion is extracted with tetrahydrofuran for oil-water separation. In order to achieve a better separation effect, NaCl is added to break the emulsion. The separated tetrahydrofuran ...

Embodiment 2

[0026] Pulverize the Xiaolongtan lignite with a water content of 14.8% to 0.25-0.40mm, and add the pulverized lignite and water into the high-pressure reactor according to the weight ratio of water and lignite of 5:1, and heat up at a rate of 10°C / min under a nitrogen atmosphere. The speed makes the reaction temperature reach the set reaction temperature of 550°C, and after the reaction pressure reaches 32Mpa, start timing the reaction. After 5 minutes of reaction, the heating was stopped, the reactor was removed, and cooled to room temperature by forced air. Subsequent gas metering analysis and oil-water separation are all the same as in Example 1. The reaction results are shown in Table 1.

Embodiment 3

[0028] Xiaolongtan lignite has a water content of 14.8%. Pulverize the lignite to 0.25-0.40mm, add the pulverized lignite and water into the high-pressure reactor according to the weight ratio of water and lignite 4:1, and make the reaction temperature reach the set temperature at a heating rate of 12.5°C / min under nitrogen atmosphere. The predetermined reaction temperature is 600°C, and after the reaction pressure reaches 29.5Mpa, start timing the reaction. After 5 minutes of reaction, the heating was stopped, the reactor was removed, and cooled to room temperature by forced air. Subsequent gas metering analysis and oil-water separation are all the same as in Example 1. The reaction results are shown in Table 1.

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Abstract

A method for producing hydrogen-containing gas from lignite and peat is to add pulverized lignite or peat, additives and water into a high-pressure reactor, and raise the reaction temperature to 350-350- 700°C, after the reaction pressure reaches 16-40MPa, react for 5-60 minutes, cool to room temperature, and separate gas-liquid products, the separated gas is hydrogen-containing gas. The invention has the advantages of low energy consumption, environmental friendliness, fast reaction speed, short residence time and simple process.

Description

Technical field: [0001] The invention belongs to a method for producing hydrogen-containing gas from lignite and peat, in particular to a method for producing hydrogen-containing gas from lignite and peat under the condition of supercritical water and adding alkaline earth metals. Background technique: [0002] Lignite is a type of coal with a calorific value of 3500-4000 kcal / kg, no caking, high volatile content, and high moisture content. China's lignite reserves reach 126 billion tons, accounting for 14% of the country's total coal reserves. Peat is a combustible organic mineral composed of water, minerals and organic matter, with a large water content. China's total reserves of peat resources amount to 4.7 billion tons, which is an important potential energy source. Lignite and peat are not suitable for long-distance transportation due to their high moisture content, low calorific value, and easy decomposition and spontaneous combustion; direct combustion is inefficient...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B3/06C10G1/06
CPCY02E60/36
Inventor 毕继诚程乐明任辉张荣
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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