Gasoline selective hydrodesulfurization and olefin reduction catalyst and preparation method and application thereof

An olefin catalyst and hydrodesulfurization technology are applied in low olefin gasoline products to produce low sulfur fields to achieve the effects of improving selectivity, improving and reducing the loss of octane number.

Pending Publication Date: 2021-12-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The catalyst can increase HDS activity without involving olefin saturation and octane loss

Method used

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  • Gasoline selective hydrodesulfurization and olefin reduction catalyst and preparation method and application thereof
  • Gasoline selective hydrodesulfurization and olefin reduction catalyst and preparation method and application thereof
  • Gasoline selective hydrodesulfurization and olefin reduction catalyst and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The gasoline selective hydrodesulfurization and olefin reduction catalyst prepared in this example is designated as GDS-1.

[0046] Preparation of alumina-based carrier: Weigh 1000g pseudo-thin water aluminum hydroxide powder (Al 2 o 3 Dry basis content is 78wt%), adding Al 2 o 3 5wt% squid powder extrusion aid on a dry basis, 200mL of a 10% nitric acid aqueous solution, mixed and rolled to form a plastic powder, and a cylindrical strip with a diameter of 1.5mm was prepared with an extruder, and dried at 120°C 8 hours, calcination at 520°C for 5 hours to prepare an alumina-based carrier;

[0047] Preparation of alumina-based carrier covered with graphene oxide on the surface: Weigh 0.4g graphene oxide (GO) and 50g alumina-based carrier into a beaker, put it into a microwave oven for 700W microwave treatment for 1.0h, then add 94mL mass The KOH solution with a concentration of 10% continued to be treated with 600W microwave for 2.0h, taken out and filtered, and dried...

Embodiment 2

[0052] The gasoline selective hydrodesulfurization and olefin reduction catalyst prepared in this example is designated as GDS-2.

[0053] Preparation of alumina-based carrier: the same as in Example 1;

[0054] Preparation of alumina-based support covered with graphene oxide: Weigh 1.0g graphene oxide (GO) and 50g Al 2 o 3 Add the carrier into a beaker, put it into a microwave oven for 700W microwave treatment for 1.0h, then add 125mL of KOH solution with a mass concentration of 20% and continue 600W microwave treatment for 4.0h, take it out and filter, and dry at 140°C for 8 hours to obtain a surface-coated There is an alumina-based carrier of graphene oxide, and its TEM image is shown in image 3 ;

[0055] Catalyst preparation: MoO on catalyst 3 The content is 12.0wt%, and the CoO content is 3.5wt%. Take quantitative molybdenum oxide and basic cobalt carbonate, add deionized water, and make 60mL impregnation solution. Heat to 80°C, add 20mL of concentrated ammonia wat...

Embodiment 3

[0059] The gasoline selective hydrodesulfurization and olefin reduction catalyst prepared in this example is designated as GDS-3.

[0060] Preparation of alumina-based carrier: the same as in Example 1;

[0061] Preparation of alumina-based carrier covered with graphene oxide: Weigh 3.0g graphene oxide (GO) and 50g Al 2 o 3 Add the carrier into the beaker, put it into a microwave oven and treat it with 700W microwave for 1.0h, then add 150mL of KOH solution with a mass concentration of 20% to continue the microwave treatment at 600W for 4h, take it out and filter it, and dry it at 140°C for 8 hours to obtain a surface-coated Alumina-based support for graphene oxide, its TEM image is shown in Figure 5 ;

[0062] Catalyst preparation: same as Example 2, recorded as GDS-3 catalyst.

[0063] The properties of the GDS-3 catalyst are shown in Table 1, and the TEM image of the Co-Mo-S active phase crystallography of the GDS-3 catalyst after presulfurization is shown in Table 1. ...

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Abstract

The invention discloses a gasoline selective hydrodesulfurization and olefin reduction catalyst and a preparation method and application thereof. The catalyst comprises a carrier and an active metal component, wherein the carrier is an alumina-based carrier of which the surface is coated with graphene oxide. The method comprises the following steps of: (1) mixing graphene oxide with an alumina-based carrier, carrying out first microwave treatment, adding an alkaline solution, carrying out second microwave treatment, filtering, and drying to obtain an alumina-based carrier of which the surface is coated with graphene oxide; and (2) loading an active metal component onto the carrier obtained in the step (1), and drying to obtain the catalyst. The catalyst is used in a hydrogenation process for producing clean gasoline, and compared with a traditional hydrodesulfurization catalyst, the catalyst has higher hydrodesulfurization selectivity and less octane number loss.

Description

technical field [0001] The invention relates to a selective hydrodesulfurization catalyst and a preparation method thereof, which is especially suitable for producing low-sulfur and low-olefin gasoline products in a gasoline hydrogenation process. Background technique [0002] With the rapid growth of China's economy, the number of household cars continues to increase. From the end of June 2017 to the end of 2019, the number of household cars rose from 205 million to 226 million, which has also led to China's gasoline demand in recent years. showing continuous growth. At the same time, in order to reduce the emission of harmful substances in automobile exhaust, China has formulated increasingly stringent standards for clean gasoline. Starting from 2019, China will implement the National VI clean gasoline standard in stages. The National VI gasoline standard will be implemented in two stages, A and B. The National VIA standard requires sulfur content ≯10µg / g, olefin content ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/051B01J37/02B01J37/08B01J37/20C10G45/08
CPCB01J27/0515B01J37/0207B01J37/08B01J37/20C10G45/08C10G2300/202C10G2300/4006C10G2300/4012C10G2300/4018C10G2400/02B01J35/23B01J35/397
Inventor 赵乐平金鑫郭振东尤百玲郭金尹晓莹张会成王丽华
Owner CHINA PETROLEUM & CHEM CORP
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