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Method for preparing hydrogen-rich fuel gas through rapid co-pyrolysis of dewatered Fenton sludge and biomass

A biomass and co-pyrolysis technology, which is applied in the fields of biofuels, production of combustible gases, chemical instruments and methods, etc., can solve the problems of large output of dewatered Fenton sludge and high treatment costs, and achieve the promotion of in-situ catalytic cracking and product energy. The effect of high density and increased productivity

Inactive Publication Date: 2021-06-15
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In summary, in view of the existing problems in the prior art, such as "large output of dewatered Fenton sludge, easy to produce secondary pollution if not handled properly, and high treatment cost", the purpose of the present invention is to provide a method for utilizing dewatered Fenton sludge and biomass A method for producing hydrogen-rich gas by rapid co-pyrolysis. In the method of the present invention, dehydrated Fenton sludge is used as a biomass pyrolysis catalyst to realize efficient catalytic cracking of biomass to produce hydrogen-rich gas.

Method used

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  • Method for preparing hydrogen-rich fuel gas through rapid co-pyrolysis of dewatered Fenton sludge and biomass
  • Method for preparing hydrogen-rich fuel gas through rapid co-pyrolysis of dewatered Fenton sludge and biomass
  • Method for preparing hydrogen-rich fuel gas through rapid co-pyrolysis of dewatered Fenton sludge and biomass

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Fenton sludge is dehydrated (Fenton sludge is from Hangzhou Guotai Environmental Protection Technology Co., Ltd.), and the treatment process is as follows: Fenton sludge is firstly dehydrated by mechanical pressure filtration, and then dried at 105°C for 12 hours to obtain dehydrated Fenton sludge. mud.

[0044] In order to explore the specific composition of dewatered Fenton sludge, X-ray fluorescence spectroscopic analysis was performed on dewatered Fenton sludge to explore the content of inorganic components. The test results are shown in Table 1.

[0045] Table 1 XRF analysis of dewatered Fenton sludge

[0046]

[0047] It can be obtained from Table 1 that the Fe in dehydrated Fenton sludge 2 o 3 The content is as high as 89.64%. Iron and iron oxides have very good catalytic activity for tar reforming and cracking reactions. Therefore, dehydrated Fenton sludge can act as an iron-based catalyst in the process of biomass pyrolysis. In addition, the CaO component...

Embodiment 2

[0053] use as figure 1 The shown pyrolysis device reacts. In this example, under the condition of not adding dehydrated Fenton sludge, the influence of pyrolysis temperature on the pyrolysis gas output and gas components of soybean straw is explored. The operation process is as follows:

[0054] S1: Dry the soybean straw and crush it, pass through a 100-mesh sieve to make soybean straw powder, and take 2g of the soybean straw powder and place it in a porcelain boat;

[0055] S2: Adjust the porcelain boat to the inside of the upper end of the fixed bed reaction tube first, and compare figure 1 , the porcelain boat is located above the vertical tube furnace. Continuously feed Ar at a flow rate of 50mL / min into the fixed bed reaction tube, replace and exhaust the air in the fixed bed reaction tube, and heat up the fixed bed reaction tube through a vertical tube furnace;

[0056] S3: When the temperature of the fixed bed reaction tube rises to the pyrolysis temperature, the porc...

Embodiment 3

[0064] use as figure 1 The shown pyrolysis device reacts. In this example, under the condition of adding dehydrated Fenton sludge, the influence of pyrolysis temperature on the pyrolysis gas output and gas components of soybean straw is explored. The operation process is as follows:

[0065] S1: The dewatered Fenton sludge obtained in Example 1 was ground and passed through a 100-mesh sieve to make dewatered Fenton sludge powder. The soybean stalks are dried, pulverized, and passed through a 100-mesh sieve to prepare the soybean stalk powder.

[0066] S2: After uniformly mixing the dehydrated Fenton sludge powder obtained in step S1 with the soybean straw powder at a mass ratio of 1:5, a mixed powder is obtained. Take 2g of mixed powder and place it in a porcelain boat.

[0067] S2: Adjust the porcelain boat to the inside of the upper end of the fixed bed reaction tube first, and compare figure 1, the porcelain boat is located above the vertical tube furnace. Continuously ...

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Abstract

The invention discloses a method for preparing hydrogen-rich fuel gas through rapid co-pyrolysis of dewatered Fenton sludge and biomass. The method comprises the following steps: mixing dewatered Fenton sludge powder and biomass waste powder to prepare a pyrolysis precursor raw material; and then taking a proper amount of pyrolysis precursor raw material, pyrolyzing at 600-800 DEG C under the protection of Ar atmosphere, and collecting a gas-phase product through a gas collecting device. Based on the characteristic that the dewatered Fenton sludge contains iron and calcium elements, the dewatered Fenton sludge is used as a biomass pyrolysis catalyst. According to the dewatered Fenton sludge, the content of hydrogen in a biomass pyrolysis gas product can be remarkably increased, and especially at the pyrolysis temperature of 800 DEG C, the volume percent of hydrogen in combustible gas is remarkably increased. The hydrogen-rich fuel gas is prepared by co-pyrolysis of the dehydrated Fenton sludge and the biomass, the method is a good measure of turning waste into wealth and treating waste with waste, and an effective way is provided for proper treatment of waste and acquisition of hydrogen energy.

Description

technical field [0001] The invention relates to a method for preparing hydrogen-rich gas by rapid co-pyrolysis of dehydrated Fenton sludge and biomass. Background technique [0002] Fenton oxidation technology is currently the most widely used and most frequently used advanced oxidation technology in the market. It has the characteristics of strong oxidation, no selectivity, simple equipment, and easy operation. Fenton oxidation technology mainly through Fe 2+ with H 2 o 2 The reaction generates strong oxidizing hydroxyl radicals (OH) to achieve the oxidative degradation of refractory pollutants, and after the oxidation process is completed, it is necessary to remove the iron ions in the water by adding alkali, so that the remaining iron ions are precipitated. And neutralize the pH value of the wastewater. Fenton sludge, that is, the chemical sludge produced in the subsequent flocculation process of the Fenton oxidation process, the inorganic matter in which is mainly co...

Claims

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Application Information

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IPC IPC(8): C10B53/02C10B57/10C10J3/02C10J3/20B09B3/00
CPCC10B53/02C10B57/10C10J3/02C10J3/20C10J2200/06C10J2300/092C10J2300/0986B09B3/40Y02E50/10
Inventor 潘志彦叶智恒胡沔郑昕郦林军赵天俊李连朋叶婧柔
Owner ZHEJIANG UNIV OF TECH
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