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Preparation method of micro-nano-scale desulfurization adsorbent

An adsorbent, micro-nano technology, applied in chemical instruments and methods, alkali metal oxides/hydroxides, inorganic chemistry, etc., can solve the problems of complex biogas desulfurizer process, reducing the content of purified biogas, and long operation time, etc. Achieve the effect of breaking through the technical bottleneck, increasing the specific surface area, and being easy to clean and regenerate

Inactive Publication Date: 2019-03-19
SHANDONG HUATAI PAPER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The biogas desulfurizer prepared by this method has complicated process and long operation time. At the same time, the pores between the decarbonization units are large, which reduces the content of purified biogas per unit volume.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1.1 Preparation of nanoscale iron oxide particles

[0025] FeCl 3 ·6H 2 The mass of O is 10g, dissolved in 50mL deionized water, heated to 50°C, adding 6g of sodium hydroxide, and then adding 1g of surfactant cetyltrimethylammonium bromide, stirring continuously, and reacting at 60°C for 30min, The whole reaction process is protected by an inert gas to obtain a precipitate, which is separated by an external magnetic field, washed, washed and freeze-dried at -50° C. to obtain nano-sized iron oxide particles.

[0026] 1.2 Preparation of micro-nano-scale desulfurization adsorbent

[0027] Take 50g nanoscale iron oxide particles, add inorganic pore formers CaO and MnO 2 A total of 1.25g, a total of 1.25g of organic pore-forming agent nano-microcrystalline cellulose, a total of 2.5g of pore-forming agent, add 75g of cement, 15g of bentonite, 40g of water, stir evenly, at a pressure of about 10 7 After Pascal is extruded, it is calcined at a high temperature of 900-1000°C...

Embodiment 2

[0029] 2.1 Preparation of nanoscale iron oxide particles

[0030] FeCl 3 ·6H 2 O mass is 10g, dissolve in 50mL deionized water, heat to 50°C, add 8g of sodium hydroxide, then add 3g of surfactant cetyltrimethylammonium bromide, keep stirring, react at 60°C for 30min, The whole reaction process is protected by an inert gas to obtain a precipitate, which is separated by an external magnetic field, washed, washed, and freeze-dried at -50° C. to obtain nano-sized iron oxide particles.

[0031] 2.2 Preparation of micro-nano-scale desulfurization adsorbent

[0032] Take 50g nanoscale iron oxide particles, add inorganic pore formers CaO and MnO 2 A total of 1.5g, a total of 1.5g of organic pore-forming agent nano-microcrystalline cellulose, a total of 3g of pore-forming agent, add 70g of cement, 14g of bentonite, add 45g of water, stir evenly, at a pressure of about 10 7 After Pascal is extruded, it is calcined at a high temperature of 900-1000°C and cooled to room temperature to...

Embodiment 3

[0034] 3.1 Preparation of nanoscale iron oxide particles

[0035] FeCl 3 ·6H 2 O mass is 10g, dissolve in 50mL deionized water, heat to 50°C, add 7g of sodium hydroxide, then add 2g of surfactant cetyltrimethylammonium bromide, keep stirring, react at 60°C for 35min, The whole reaction process is protected by an inert gas to obtain a precipitate, which is separated by an external magnetic field, washed, washed, and freeze-dried at -50° C. to obtain nano-sized iron oxide particles.

[0036] 3.2 Preparation of micro-nano-scale desulfurization adsorbent

[0037] Take 50g nanoscale iron oxide particles, add inorganic pore formers CaO and MnO 2A total of 1.75g, a total of 1.75g ​​of organic pore-forming agent nano-microcrystalline cellulose, a total of 3.5g of pore-forming agent, adding 65g of cement, 13g of bentonite, adding 35g of water, stirring evenly, at a pressure of about 10 7 After Pascal is extruded, it is calcined at a high temperature of 900-1000°C and cooled to room...

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Abstract

The invention belongs to the field of biogas purification in the pulping and papermaking industry, and particularly relates to a preparation method of a micro-nano-scale desulfurization adsorbent. Thepreparation method of the micro-nano-scale desulfurization adsorbent is mainly used for desulfurization of biogas produced by pulping and papermaking comprehensive wastewater. The preparation methodof the micro-nano-scale desulfurization adsorbent disclosed by the invention comprises the steps of mixing nano-scale iron oxide particles with an inorganic pore-forming agent, an organic pore-formingagent and a base material; adding water into the mixture and uniformly stirring; performing extrusion-molding the mixture; then calcinating the mixture at a high temperature and cooling the mixture to obtain the micro-nano-scale desulfurization adsorbent. According to the preparation method, the micro-nano structure of the desulfurization adsorbent is constructed by preparing the nano-scale ironoxide particles and using the micro-nano channel technology, thereby greatly increasing the specific surface area of the desulfurizing agent, greatly improving the adsorption of the nano-scale iron oxide particles for hydrogen sulfide, further increasing the maximum amount of sulfur which can be removed by the desulfurizing agent in unit mass and breaking through the technical bottleneck of low efficiency of biogas desulfurization.

Description

technical field [0001] The invention belongs to the field of biogas purification in the pulp and paper industry, and in particular relates to a preparation method of a micro-nano-scale desulfurization adsorbent, which is mainly used for desulfurization of biogas produced by pulp and paper comprehensive wastewater. Background technique [0002] With the continuous expansion of domestic applications of clean energy represented by methane and solar energy, the advantages of new energy have been further highlighted. However, at present, the anaerobic biogas produced in the pulp and paper industry mainly uses direct combustion to generate steam for industrial heating or internal combustion engine power generation. After the biogas is purified, it can be used as an alternative to natural gas such as industrial gas or automobile fuel, which has a small loss and high energy utilization rate, and can realize efficient utilization of biogas. [0003] At present, the existing biogas d...

Claims

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Application Information

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IPC IPC(8): B01J20/06B01J20/28B01J20/30C10L3/10
CPCB01J20/06B01J20/28016C10L3/103C10L3/104C10L2290/542
Inventor 张凤山高庞业查瑞涛刘燕韶李晓亮魏文光周景蓬
Owner SHANDONG HUATAI PAPER
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