A method for oxidative desulfurization of diesel oil with a metal oxide modified nano-iron oxide catalyst
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A technology of nano-iron oxide and oxidative desulfurization, which is applied in the chemical industry and can solve the problems of reduced yield, low yield of diesel oil, and deterioration of oil products.
Inactive Publication Date: 2015-08-19
南通宝聚颜料有限公司
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[0006] In diesel oil desulfurization, because benzothiophene sulfides exist in distillate diesel oil above 300°C, the yield of diesel oil is low when oxidative desulfurization of diesel oil is carried out, and some straight-chain hydrocarbons and aromatic hydrocarbons will be oxidized, thereby making the oil product Poor or reduced yield
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Embodiment 1
[0024] Weigh 3g of ammonium molybdate tetrahydrate, dissolve it in 5ml of distilled water, stir to dissolve, add 10g of nano-iron oxide to it, and ultrasonicate at 40°C for 30min; after ultrasonication, let it stand for 12h, dry at 120°C, grind it, and put it in a resistance furnace Calcined at 500 °C for 2 h to obtain MoO with a loading of 25% (wt) 3 / α-Fe 2 o 3 catalyst.
[0025] In a clean round-bottomed flask, add 0.1g of the above catalyst and 10ml of diesel oil sample, stir and react at a certain temperature for 90min, stop stirring, separate the catalyst and diesel in a centrifuge, extract with extractant DMF, and use a dosage of extractant The oil ratio is 1:1, continuous extraction is performed three times, the upper oil phase is taken, and the sulfur content is measured with a microcoulomb instrument. The gasification temperature is 600°C, the combustion temperature is 810°C, and the temperature in the stable section is 700°C. The sulfur content before and after th...
Embodiment 2
[0027] Weigh 2g each of ammonium molybdate tetrahydrate and nickel sulfate, dissolve them in 5ml of distilled water, stir to dissolve, add 10g of nano-iron oxide to it, and ultrasonicate at 40°C for 30min; after ultrasonication, let stand for 12h, dry at 120°C, grind, The catalyst was calcined at 500°C for 2 h in a resistance furnace to obtain a catalyst with a loading of 30% (wt).
[0028] Take 0.05 g of the above catalyst and 10 ml of diesel oil samples, react according to the method of Example 1, react at 60° C., and measure the samples. image 3 It is the treatment result of several oil samples. After the reaction, the sulfur content in diesel oil in oil sample 1 dropped from 4000ppm to 300ppm, and the sulfur content in diesel oil in oil sample 2 dropped from 3000ppm to 250ppm.
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Abstract
The invention discloses a method for oxidative desulfurization of diesel oil with a metal oxide-modified nano-iron oxide catalyst, which comprises the following steps: 1) dissolving soluble metal salt in distilled water, immersing nano-α-Fe2O3 in the solution, and ultrasonically Disperse, dry, and roast in a muffle furnace; 2) Use hydrogen peroxide-acidic reagent as the oxidation system, add hydrogen peroxide-acid oxidant and catalyst, and convert organic sulfides into sulfones and sulfoxides; 3) Separate the catalyst and Diesel oil; 4) The sulfur products in the diesel oil are mixed with the extractant, left to stand for phase separation to obtain the upper phase oil phase and the lower phase extraction phase, and the sulfur content in the diesel oil is determined with a microcoulombometer. The invention adopts a diesel oxidation desulfurization catalyst with higher selective oxidation, strong acid center and high activity to carry out oxidation desulfurization, effectively removes various sulfur compounds in diesel oil, and can achieve the purpose of deep desulfurization.
Description
technical field [0001] The invention relates to a desulfurization method, in particular to a method for oxidative desulfurization of diesel oil with a metal oxide-modified nano-iron oxide catalyst, which belongs to the technical field of chemical industry. Background technique [0002] With the development of industry and the popularization of automobiles, the demand for gasoline and diesel is increasing rapidly, and the proportion of diesel in fuel is increasing, which contains a large amount of sulfur compounds, which will cause environmental problems. The sulfide in diesel is one of the main sources of acid rain; the sulfide after combustion poisons the three-way catalyst of the exhaust gas purification system of the mechanical engine, and accelerates the corrosion and wear of the engine; Emissions have an obvious promotion effect. The sulfur oxides formed after fuel combustion are easily converted into calcium sulfate and form fine particles; more sulfur-containing polyc...
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