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Method for utilizing microwave in-situ synthesis to prepare zinc-ferrite desulfurizing agent

A technology of in-situ synthesis and desulfurization agent, which is applied in the direction of chemical instruments and methods, removal of iron compounds, and gas pollutants, can solve the problems of desulfurization agent structure pulverization and reduction of vulcanization activity, so as to improve desulfurization efficiency and benefit Effect of mass transfer and enrichment of pore structure

Inactive Publication Date: 2017-01-18
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a method for preparing zinc ferrite desulfurizer by microwave in-situ synthesis, to improve the sulfur capacity utilization rate and mechanical strength of the desulfurizer, and to solve the problem of zinc ferrite desulfurizer in the vulcanization-regeneration cycle process. The reduction of vulcanization activity and the pulverization of the internal structure of the desulfurizer

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Weigh 2.19g zinc acetate (C 4 h 6 o 4 Zn·2H 2 O), 8.08g iron nitrate (Fe(NO 3 ) 3 9H 2 O), with 5.04g oxalic acid (H 2 C 2 o 4 2H 2 O) After mixing, grind in a mortar for 1 hour, and then put it into a ball mill for 2 hours at 350r / min; after drying the ball mill at 90°C, add 4.82g of laterite, continue ball milling in the ball mill for 2 hours, add water and extrude And after drying and molding, the precursor of the desulfurizing agent is obtained. Put the prepared desulfurizer precursor into a microwave tube furnace, set the microwave power to 1000W, microwave frequency to 2450MHz, and raise the temperature to 250°C under nitrogen atmosphere to decompose the desulfurizer precursor. Replace the inside of the microwave tube furnace with a simulated Texaco gas atmosphere, and continue to heat up to 400°C for 1000h -1 The sulfuration space velocity and constant temperature microwave vulcanization until the concentration of hydrogen sulfide at the outlet of the ...

Embodiment 2

[0032] Weigh 2.19g of zinc acetate and 7.66g of ferric nitrate, mix them with 4.95g of oxalic acid, grind them in a mortar for 1 hour, and then put them into a ball mill at 400r / min for 2 hours; g laterite, continue to mill in a ball mill for 2 hours, add water to extrude and dry to obtain a desulfurizer precursor. Put the prepared desulfurizer precursor into a microwave tube furnace, set the microwave power to 1000W, microwave frequency to 2450MHz, and raise the temperature to 300°C under nitrogen atmosphere to decompose the desulfurizer precursor. Replace the inside of the microwave tube furnace with a simulated Texaco gas atmosphere, and continue to heat up to 450°C for 1500h -1 The sulfuration space velocity and constant temperature microwave vulcanization until the concentration of hydrogen sulfide at the outlet of the tube furnace is the same as that at the inlet. After the vulcanization is complete, the microwave tube furnace is replaced with a mixed gas of oxygen and ...

Embodiment 3

[0035] Weigh 2.19g of zinc acetate and 7.66g of ferric nitrate, mix them with 5.21g of oxalic acid, grind them in a mortar for 1 hour, then put them into a ball mill and mill them at 450r / min for 2 hours; g laterite, continue to mill in a ball mill for 2 hours, add water to extrude and dry to obtain a desulfurizer precursor. Put the prepared desulfurizer precursor into a microwave tube furnace, set the microwave power to 1000W, microwave frequency to 2450MHz, and raise the temperature to 300°C under nitrogen atmosphere to decompose the desulfurizer precursor. Replace the inside of the microwave tube furnace with a simulated Texaco gas atmosphere, and continue to heat up to 400°C for 2000h -1 The sulfuration space velocity and constant temperature microwave vulcanization until the concentration of hydrogen sulfide at the outlet of the tube furnace is the same as that at the inlet. After the vulcanization is complete, the microwave tube furnace is replaced with a mixed gas of o...

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Abstract

The invention discloses a method for utilizing microwave in-situ synthesis to prepare a zinc-ferrite desulfurizing agent. A solid-phase iron and zinc synthesizing oxalic acid is mixed with a red soil carrier to prepare a desulfurizing agent precursor; in a microwave environment, the desulfurizing agent precursor is firstly roasted to perform decomposition, then constant low temperature vulcanization is performed in a simulated Texaco coal gas atmosphere, finally in-situ regeneration curing is performed in an oxygen-bearing atmosphere to obtain the fresh medium-and-high temperature coal gas desulfurizing agent. By the adoption of the zinc-ferrite desulfurizing agent, the problems of vulcanization activity reduction and desulfurizing agent internal structure powdering occurred in the vulcanization-regeneration cycling process are solved, the sulfur capacity utilization rate and mechanical strength of the desulfurizing agent are improved, the single-time sulfur capacity of the desulfurizing agent is kept above 11%, the desulfurizing efficiency is still kept above 97% after ten times of vulcanization-regeneration cycling, and the mechanical strength is above 160 N / cm.

Description

technical field [0001] The invention belongs to the technical field of coal chemical desulfurizer preparation, and relates to a method for preparing a medium-high temperature gas desulfurizer, in particular to a microwave-based method for preparing a zinc ferrite desulfurizer. Background technique [0002] my country's economy continues to develop, and energy consumption will continue to grow rapidly in the future. It is difficult to change the coal-based energy consumption pattern in the short term. It is imperative to control smog, improve energy utilization efficiency, and strengthen the clean utilization of coal. Row. Clean transformation and efficient utilization of coal resources are important energy utilization technologies for sustainable economic and social development and environmental friendliness in my country. Integrated gasification combined cycle power generation (IGCC), molten carbonate fuel cell (CMFC) and other power generation technologies and their synthes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10K1/20C01G49/00
CPCC10K1/004C01G49/00C10K1/20
Inventor 米杰冯宇李阳武蒙蒙鲍卫仁
Owner TAIYUAN UNIV OF TECH