Combination method of gasification and coke processing from inferior heavy oil
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A technology of low-quality heavy oil and combined methods, which is applied in chemical instruments and methods, petroleum industry, cracking, etc., and can solve the problem of low catalytic activity of coke transfer agent
Active Publication Date: 2011-04-27
CHINA PETROLEUM & CHEM CORP +1
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This method can realize the gasification reaction at higher tempera
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Embodiment 1
[0023] Take 6 kg of kaolin and place it in a container, add 18 kg of deionized water, stir at 30°C and mix evenly, while stirring, add 2 kg of a mixture of potassium oxide and calcium oxide, wherein the atomic ratio of potassium to calcium is 0.2, stir Evenly set aside.
[0024] Take 1 kg of ZRP molecular sieve with a silicon-aluminum ratio of 20, add 1.5 kg of deionized water and stir evenly for use.
[0025] Take 0.7 kg of pseudo-boehmite, add 1.2 kg of deionized water, stir evenly, add 0.3 kg of aluminum sol, stir for 10 minutes, add appropriate amount of hydrochloric acid to make the pH of the slurry between 1.2 and 3.0, and let it stand for 30 minutes.
[0026] The above three slurries were mixed and stirred for 20 minutes, spray-dried to make the average particle size of the solid particles between 65-90 μm, and calcined at 600° C. for 60 minutes to obtain the catalyst, which was designated as Cat-1.
Embodiment 2～7
[0028] Catalysts Cat-2, Cat-3, Cat-4, Cat-5, Cat-6, and Cat-7 with different component contents were prepared according to the preparation method of Example 1 by adjusting the dosage of each component. Its composition is shown in Table 1.
Embodiment 8
[0037] In a fixed fluidized bed reactor, catalysts Cat-1 to Cat-7 are used to contact and react with Tahe atmospheric residue (properties are shown in Table 2). The weight hourly space velocity is 4h -1 , the product distribution after treatment is shown in Table 3.
[0038] The coke contents on catalysts Cat-1 and Cat-3 after fluidized coking were 2.1% and 2.7%, respectively, and the gasification reaction data under different operating conditions are shown in Table 4.
[0039] Table 2
[0040]
[0041] table 3
[0042]
[0043] Table 4
[0044]
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Abstract
The invention relates to a combination method of gasification and coke processing from inferior heavy oil, which mainly comprises the following steps of: making the heavy oil raw material in contact with a catalyst, separating product oil gas from a spent catalyst, and sending the oil gas into a subsequent separation system; sending the spent catalyst into a gasification furnace after steam stripping, separating synthetic gas obtained through gasification reaction from a half-regenerated catalyst with part of coke removed, and using the synthetic gas to produce hydrogen or as a raw material gas of C1 chemical synthesis; and sending the half-regenerated catalyst with part of coke removed to a regenerator for complete generation, and reintroducing the regenerated catalyst into a reactor. The active gasification components of the catalyst are alkali metal and alkali earth metal, the content of oxides is 2-30% by taking the total amount of the catalyst as a reference, and the atomic ratio of the alkali metal to the alkali earth metal is (0.05-1.1):1. The combination method is applicable to the production of synthetic gas or hydrogen while processing heavy oil and provides a raw material for hydrogenation process or Fisher-Tropsch synthesis.
Description
technical field [0001] The present invention relates to the catalytic cracking process or thermal cracking process of heavy oil and the coke gasification hydrogen production process produced by cracking. , while producing hydrogen or synthesis gas, converting excess carbon in heavy oil into products with higher added value. Background technique [0002] The development trend of heavy and inferior crude oil in the world and the increasingly stringent environmental protection regulations have brought many new problems to the petroleum processing industry. For example, the content of harmful elements such as sulfur, nitrogen, nickel, and vanadium in raw oil is high, and hydrogenation pretreatment is required; the hydrogen-carbon ratio of raw oil is low, and in order to increase the yield of high-value products such as gasoline and diesel, it is necessary to Hydrotreating: The inferiority of raw materials will inevitably affect the properties of the product. In order to improve...
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