A dual-functional catalyst for heavy oil cracking and gasification and its preparation method

A dual-function catalyst and catalyst technology, applied in physical/chemical process catalysts, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problems of low conversion rate of heavy oil, low catalytic activity, insufficient effective gas yield, etc. Content, increase the reaction rate, good anti-sulfur nitrogen effect

CN103962175BInactive Publication Date: 2016-08-03INST OF PROCESS ENG CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2016-08-03
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a bifunctional catalyst for heavy oil cracking and coke gasification. The bifunctional catalyst contains a microporous molecular sieve and a gasification active component, wherein the microporous molecular sieve is one or a mixture of at least two selected from the group consisting of a Y-type molecular sieve, an ultra-stable Y-type molecular sieve, an X-type molecular sieve and an A-type molecular sieve, and the gasification active component is an alkali metal element and / or an alkali earth metal element. The catalyst can be applied to heavy oil cracking and gasification technology; as a heavy oil cracking catalyst, the bifunctional catalyst has adaptability to a wide range of raw oil and can process heavy oil with high carbon residue, high sulfur-nitrogen content and high heavy metal content so as to obtain high-value lightweight distillate oil; and as a coke gasification agent, the bifunctional catalyst can remove coke on the surface of a carbon deposit catalyst through gasification, produces synthetic gas and has high hydrothermal stability in the process of regeneration.
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Description

technical field

[0001] The invention belongs to the technical field intersecting industrial catalysis and energy and chemical industry. Specifically, the invention relates to a dual-functional catalyst for heavy oil cracking and coke gasification and a preparation method thereof. Background technique

[0002] With the decline of conventional crude oil resources, the degree of heavy and inferior crude oil continues to deepen. On the other hand, the rapid development of social economy has sharply increased the demand for fuel oil and gas resources. Therefore, improving the processing depth of crude oil, especially heavy crude oil, and realizing the high-value utilization of heavy crude oil are of great significance to alleviate the current shortage of oil and gas resources. Heavy oil cracking catalysts, especially those capable of processing high-sulfur, high-heavy metal and low-quality residual oils, have always been the bottleneck restricting the processing and utilization ...

Examples

Embodiment 1

[0047] The preparation method of the catalyst: Dissolve 10g of aluminum sulfate in 30mL of water, add sodium hydroxide solution to adjust the pH value to prepare aluminum sol; add a mixture of Y-type molecular sieve and macroporous alumina, the mass ratio is 1:1, and stir for 1 hour, wherein The content of molecular sieve in the catalyst is 40%, and the content of macroporous alumina in the catalyst is 40%. A certain amount of concentrated hydrochloric acid (36%) is added, and the mass ratio of hydrochloric acid to the total aluminum of the catalyst (calculated as alumina) is 15 :100, stirred for 30 minutes, added 20mL of 5mol / L magnesium chloride solution, continued to stir for 30 minutes, sprayed, dried at 120°C for 6h, and roasted at 550°C for 4h to obtain the required catalyst.

[0048] test:

[0049] The heavy oil required for the experiment was evaluated, and the evaluation data are shown in Table 1.

[0050] Table 1 Residual oil physical property characterization data ...

Embodiment 2

[0062] Dissolve 10g of sodium metaaluminate in 30mL of water, add sodium hydroxide solution to adjust the pH value to prepare aluminum sol; add a mixture of X-type molecular sieve and macroporous alumina, the mass ratio is 1:3, and stir for 2 hours; add a certain amount of Concentrated nitric acid (36%), the mass ratio of nitric acid to catalyst total aluminum (calculated as alumina) is 2:100, stir for 50 minutes, add 3mol / L calcium nitrate solution, continue stirring for 30 minutes, spray molding, and dry at 120°C Calcined for 6 hours at 580° C. for 4 hours to obtain the desired catalyst, in which the X-type molecular sieve content is 2 wt%, and the calcium element (calculated as calcium oxide) content is 2 wt%.

[0063] The method described in Example 1 was used to test the catalyst obtained in Example 2. The cracking test results are shown in Table 4. Gasification test results: the reaction temperature is 900°C, the reaction time is 40 minutes, the gasification agent is wa...

Embodiment 3

[0067] Adopt the aluminum sol of embodiment 1; Add the mixture of A-type molecular sieve and macroporous alumina, mass ratio 1:5, stir 1.5 hours; Add a certain amount of concentrated carbonic acid (40%), carbonic acid and catalyst total aluminum (with alumina The mass ratio is 25:100, stirred for 60 minutes, added 3mol / L potassium carbonate solution, continued to stir for 30 minutes, sprayed, dried at 120°C for 6 hours, and calcined at 540°C for 4 hours to obtain the desired catalyst. The content of type A molecular sieve in the medium is 45wt%, the content of gasification active components (calculated as potassium oxide and calcium oxide) is 40wt%, and the molar ratio of potassium and calcium elements in the gasification active components is 1:1.

[0068] The catalyst obtained in Example 3 was tested by the method described in Example 1. The cracking test results are shown in Table 5. Gasification test results: reaction temperature 900°C, reaction time 40 minutes, gasificati...