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Catalyst for selective hydrodesulfurization and preparation method thereof

A hydrodesulfurization and catalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve problems such as long processing time, achieve small RON loss, change surface acidity, and maintain desulfurization activity Effect

Active Publication Date: 2020-07-14
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of synthesizing the ternary hydrotalcite-like precursor, hydrothermal treatment is required, and the treatment time is relatively long

Method used

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  • Catalyst for selective hydrodesulfurization and preparation method thereof
  • Catalyst for selective hydrodesulfurization and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] The preparation of this example includes: based on the total weight of the catalyst, 5% CoO, 10% MoO 3 , 2% B 2 o 3 , 1%P 2 o 5 , 1%K 2 O, 5% ZnO-76% Al 2 o 3 Catalyst A.

[0050] Dissolve 800g of zinc nitrate in 4L of water to form a zinc-containing solution, and dissolve 120g of sodium metaaluminate and 120g of sodium carbonate in 1.7L of water to form an aluminum-containing solution. Take 2L zinc-containing solution, control the system temperature at 60°C, add aluminum-containing solution dropwise to it until the pH value reaches 9, stop adding the aluminum-containing solution dropwise, add the remaining 2L zinc-containing solution dropwise to the mixing system, and continue to drop the Aluminum solution until the pH value reaches 9, the total titration time is 4h. The obtained mixture was aged at 85°C for 4h, cooled and washed until neutral, dried at 120°C in an air atmosphere for 5h, and calcined at 500°C for 6h to obtain a zinc oxide sample containing zinc...

Embodiment 2

[0055] The preparation of this embodiment includes: based on the total weight of the catalyst, 4% CoO, 12% MoO 3 , 2.5% B 2 o 3 , 1.6%P 2 o 5 , 1.3%K 2 O, 15.6% ZnO-63% Al 2 o 3 Catalyst B.

[0056] The preparation method of the composite oxide carrier is the same as that in Example 1, except that when preparing the composite oxide carrier, the sample amount of zinc oxide is 26 g, and the dry alumina powder is 90 g.

[0057] Then take boric acid 4.44g, potassium phosphate 1.95g, and phosphoric acid 1.31g is completely dissolved in 56g distilled water and is mixed with auxiliary agent impregnating liquid, under room temperature, auxiliary agent impregnating liquid is sprayed on the 78.6g composite oxide carrier in the rotating drum, Place and age at room temperature for 6 hours, dry at 140° C. for 6 hours, and bake at 650° C. for 8 hours to obtain a modified composite oxide carrier.

[0058] Take by weighing cobalt nitrate 15.5g, ammonium heptamolybdate 14.7g, be dissolve...

Embodiment 3

[0060] The preparation of this example includes: based on the total weight of the catalyst, 5% CoO, 10% MoO 3 , 2% B 2 o 3 , 1%P 2 o 5 , 1%K 2 O, 20% ZnO-61% Al 2 o 3 Catalyst C.

[0061] The preparation method is the same as that of Example 1, except that when preparing the composite oxide carrier, the sample amount of zinc oxide is 40 g, and the dry alumina powder is 96 g.

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Abstract

The invention relates to a selective hydrodesulfurization catalyst. The catalyst comprises, by mass, 3-5% of CoO as an active component, 10-13% of MoO3 as an active component, 2-3% of B203 as a carrier modification aid, 1-2% of P2O5 as a carrier modification aid, 1-1.5% of K2O as a carrier modification aid and 75.5-83% of a composite oxide carrier. The catalyst carriers comprise a zinc aluminate spinel-containing zinc oxide-alumina composite oxide prepared by nonconstant pH alternating titration. The catalyst has good desulfurization selectivity and stability.

Description

technical field [0001] The invention relates to a selective hydrodesulfurization catalyst and a preparation method thereof, in particular to a selective hydrodesulfurization catalyst with a zinc oxide material containing zinc-aluminum spinel as a carrier and a preparation method thereof. Background technique [0002] In recent years, with the rapid increase of the number of motor vehicles in cities in various countries, the air pollution caused by vehicle exhaust emissions has become increasingly serious. Controlling the air quality of large and medium-sized cities has become an urgent need to improve the quality of life of people in various countries and ensure the sustainable development of the national economy. solved problem. [0003] With the implementation of China’s National IV Clean Gasoline Standard on January 1, 2014, the sulfur content in gasoline is required to be reduced to 50 μg / g, and by the end of 2016, China will implement a more stringent National V Clean G...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/19C10G45/08
Inventor 向永生崔彦君吴杰王廷海高源常晓昕李自夏王学丽姚文君李景锋刘蕾
Owner PETROCHINA CO LTD
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