Deoxidizer carrier as well as sulfur-resisting deoxidizer based on carrier and preparation method of carrier

Abstract

The invention claims a preparation method of a sulfur-resisting deoxidizer. A carrier is mainly acquired by preparing modified aluminum bauxite powder, alumina powder and titanium dioxide powder. Active components in the sulfur-resisting deoxidizer include Co, Mo and W. The preparation method of the sulfur-resisting deoxidizer disclosed by the invention has the advantages that the titanium dioxide included in the raw materials for preparing the carrier can significantly improve the deoxidization property of the deoxidizer; the modified aluminum bauxite powder included in the raw materials of the carrier is directly formed by modifying natural aluminum bauxite; the specific surface area is great, so that the usage amount of the aluminum oxide powder can be reduced, thereby achieving the purpose of reducing the cost; and meanwhile, the components comprising ferric oxide, silicon dioxide and the like in the aluminum bauxite can improve the property and the strength of the sulfur-resisting deoxidizer.

Description

technical field [0001] The invention relates to a sulfur-resistant deoxidizer, in particular to a sulfur-resistant deoxidizer and a preparation method thereof, belonging to the field of coal gasification. Background technique [0002] Coal is used as industrial raw material. During industrial production, a small amount of oxygen contained in the raw gas will react with the active component or carrier in the catalyst, causing the catalyst to be deactivated rapidly. Therefore, it is necessary to fill a large amount of oxygen above the catalyst bed. Sulfur-resistant deoxidizer, which removes oxygen from the feed gas to prolong the service life of the catalyst. The existing mature industrial deoxidizers in China are: [0003] 1) Iron-based deoxidizer: mainly used for food preservation, with poor deoxidation accuracy and deoxidation capacity; [0004] 2) Copper-based deoxidizer: at a temperature of 180-240°C and a space velocity of 1000-3000h -1 , can remove general hydrogen ...

AI Technical Summary

Problems solved by technology

[0008]The various deoxidizers mentioned above are cheap, such as iron-based, copper-based and manganese-based deoxidizers, but their performance is poor; precious metal deoxidizers are expensive, and these The deoxidizer has poor anti-toxin ability, is easy to be poisoned in the field of coal gasification, is difficult to carry out sulfur-resistant deoxidation, and has a short service life

[0009] In addition, Chinese patent ZL 02135207.0 discloses a low-cost sulfur-resistant shift deoxidizer, which is prepared from waste sulfur-resistant shift deoxidizers, and the price Inexpensive, but not very active, with a lifespan of less than a year

Chinese patent ZL93112631.2 discloses the preparation of a molybdenum-based deoxidizer, which can be used for sulfur-resistant deoxidation in industrial shift gas, but the cost is high, the preparation process is complicated, and the service life is only about one year

However, the carrier uses conventional Al2O3, which has poor mechanical strength and is prone to phase change, agglomeration and pulverization in devices with high pressure and water vapor concentration

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