Middle and low temperature coal gas fine desulfurizing agent and preparation method thereof
A desulfurizing agent and gas refining technology, which is applied in the fields of combustible gas purification, combustible gas purification/transformation, petroleum industry, etc. The effect of improving desulfurization accuracy and improving mechanical strength
Inactive Publication Date: 2012-07-11
SHANGHAI UNIV
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Problems solved by technology
[0005] The invention relates to a load type medium and low temperature gas desulfurizer and its preparation method, aiming to solve the problems of insufficient desulfurization precision, easy sintering and powderization of the desulfurizer during use
Method used
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[0017] The preparation process in this embodiment is as follows:
[0018] Weigh 12.93g of zinc nitrate hexahydrate, measure 1.94ml of manganese nitrate solution with a mass fraction of 49% to 51%, put it in a beaker, add 20ml of distilled water, and stir to dissolve. At this time, the molar ratio of Zn:Mn in the solution is 8:1. 20g γ-Al 2 o 3 Add the carrier to the above solution, seal the mouth of the beaker with plastic wrap, soak it at room temperature for 12 hours, then put it in an oven at 110°C for drying, stir once every 3 minutes during the drying process, and transfer the sample to a muffler after the water is completely evaporated. Calcined in a furnace at 500°C for 3 hours to obtain ZnO-MnO with a molar ratio of Zn:Mn of 8:1 and an active material mass fraction of 17%. 2 / γ-Al 2 o 3 Loaded desulfurizer sample. This sample is the best formulation.
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Abstract
The invention relates to a ZnO-MnO2/gama-Al2O3 middle and low temperature coal gas fine desulfurizing agent and a preparation method thereof. The ZnO-MnO2/gama-Al2O3 middle and low temperature coal gas fine desulfurizing agent comprises the following active elements in percentage by mass: 15-20% of active element MnO2 and ZnO, and 80-85% of gamma-Al2O3; and the mole ratio of the MnO2 to the ZnO is 1:(7.5-8.5). The masses of precursor Zn(NO3)2*6H2O and Mn(NO3)2 required to prepare a solution are calculated by the mass percent and the mole ratio of the active elements, and the volume of the solution is approximately equal to the volume of the carrier gamma-Al2O3. The preparation method of the ZnO-MnO2/gama-Al2O3 middle and low temperature coal gas fine desulfurizing agent comprises the following steps of: adding the carrier gamma-Al2O3 to the solution for dipping at room temperature for 12h, putting a mixture to a 110 DEG C drying oven for drying, stirring once at each 3min during drying, transferring a sample to a Muffle furnace for roasting at 400-500 DEG C for 3h after water is totally evaporated so as to obtain the ZnO-MnO2/gamma-Al2O3 load-type desulfurizing agent. The desulfurizing agent prepared by the method disclosed by the invention is 150-170m<2>/g in specific surface area, 0.50-0.55cm<3>/g in pore volume and 10-14nm in average aperture, and has the characteristics of high middle and low temperature desulfurization precision and sulfur breakthrough volume, simple preparation process and the like.
Description
technical field [0001] The invention relates to a medium and low temperature coal gas fine desulfurizer and its preparation method, in particular to a ZnO-MnO 2 / γ-Al 2 o 3 A medium-low temperature gas desulfurizer and a preparation method thereof. It belongs to the technical field of gas desulfurization agent preparation technology. Background technique [0002] Coal is the most abundant fossil fuel resource in the world, accounting for 92% of the world's fossil fuel reserves. Power generation using coal as raw material is one of the most economical means of coal utilization. Integrated gasification combined cycle power generation (IGCC), which has become a research hotspot, Hydrogen production from coke oven gas and fuel cell power generation technologies are the best ways to use coal cleanly and efficiently. my country is the world's largest coal producer and coal consumer, and its coal consumption accounts for nearly 1 / 4 of the world's total coal consumption. Coal c...
Claims
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IPC IPC(8): C10K1/20
Inventor 郭曙强李玉龙丁伟中李德颀王海海
Owner SHANGHAI UNIV
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