Coal tar hydrodemetallization catalyst and preparation method thereof

A hydrodemetallization and catalyst technology, which is applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of cumbersome steps and secondary pollution, and achieve the effect of reducing surface tension

Inactive Publication Date: 2018-11-02
一重集团大连工程建设有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology describes an improved type of coke oil hydrocracking (COH) catalyst that uses this new technique without causing any issues such as crackings when used over time. It also maintains good structural integrity even if it has been exposed to harsh environments like sea air. Overall, these technical improvements improve performance and durability of CO Hcatalysis systems.

Problems solved by technology

Technological Problem: Current technical problem addressed in the patents relating to current techniques involving coal pyrodesulfonification (CPS) processes that involve expensive equipment like fluidized bed reactors and wet oxidative decomposition (WOX). There remains a challenge to develop effective and efficient ways to convert coal into liquid fuels without causing harmful emissions from burning fossil sources.

Method used

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preparation example Construction

[0050] The preparation method of coal tar hydrogenation demetallization catalyst support comprises the following steps:

[0051] A. Weigh 73% to 91% of dry aluminum hydroxide powder, 2% to 6% of lubricant, 5% to 15% of pore expanding agent and 2% to 6% of sintering agent in proportion, add 100% to 150% of water and knead Uniform post-extrusion molding;

[0052] B. Using freeze-drying, through three stages of freezing, sublimation and re-drying, adjust the temperature and pressure in the freeze-drying process, control the step-by-step release of water, and gradually remove the surface water and bound water in the carrier. The freezing temperature is -25°C ~-35°C, freezing pressure 8pa~12pa; control freeze-drying oven temperature -55°C--65°C during sublimation, freeze-drying oven pressure 1pa-3pa, shelf temperature 10°C-30°C; re-drying temperature 25°C-35 ℃;

[0053] C. Preparation and roasting of the alumina carrier. The heating rate is controlled at 20°C / h to 25°C / h, the tempe...

Embodiment 1

[0060] ① Preparation of alumina carrier. Weigh 500g of aluminum hydroxide dry glue, 7g of turnip powder, 7g of ammonium oxalate, and 18g of kaolin, and add them to the dry mixer. Extrusion machine extrusion molding, put the formed material into the cold storage to cool to 2°C, and then place it in a freeze-drying box with a pressure of -30°C and a pressure of 10Pa to freeze the formed material quickly, and reduce the temperature and pressure in the freeze-drying box to -60 ℃ pressure 2Pa, control shelf temperature 10 ℃, when the water vapor from the sublimation of ice in the material in the vacuum system no longer flows out, then raise the shelf to 30 ℃ to re-dry the material, and discharge the water vapor in the vacuum system The water in the condenser removes the bound water in the material. After drying, control the heating rate of 25°C / h, and control the temperature of 520°C for 4h in a calcination furnace to obtain an alumina carrier.

[0061] ② Catalyst preparation. W...

Embodiment 2

[0063] ① Preparation of alumina carrier. Weigh 500g of aluminum hydroxide dry glue, 7g of starch, 7g of urea, and 18g of attapulgite into a dry mixer, dry mix evenly, slowly add 750g of pure water, knead and roll, roll into a plastic body, and then squeeze The strip machine is extruded into strips, put the formed material into the cold storage to cool to 2°C, and then put it in the -30°C (10Pa) freeze-drying box to freeze the formed material quickly, and reduce the temperature and pressure in the freeze-drying box to -60 ℃ and 2Pa, control the temperature of the shelf at 10℃, and when the water vapor from the sublimation of ice in the material in the vacuum system no longer flows out, raise the shelf to 30℃ for re-drying of the material, and discharge the water vapor in the vacuum system The water in the condenser removes the bound water in the material. After drying, the heating rate was controlled at 20°C / h, and the temperature was controlled at 520°C for 6 hours in a roast...

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PUM

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Abstract

The invention relates to a coal tar hydrodemetallization catalyst and a preparation method thereof. The coal tar hydrodemetallization catalyst comprises an alumina supporter and a hydrogenation activecomponent. The coal tar hydrodemetallization catalyst and the preparation method thereof have the advantages that a freeze drying method including freezing, sublimation and drying is used in the preparation of the supporter, and the dried supporter can keep the original frame structure after extrusion molding as compared with a supporter dried by other drying methods; Si is introduced into a network formed by Al-O bonds during supporter calcining, the connection between the Al-O bonds is broken to form a broken network, surface tension is lowered, pore wall collapse increases the pore diameter, and the pore structure of the alumina supporter can be directly effectively controlled; the prepared catalyst condenses the surface hydroxyl groups of the alumina to lower the acidity of the supporter so as to increase the reaction stability of the hydrodemetallization catalyst; by the dual function of a pore-enlarging agent and a sintering agent, the alumina supporter is large in pore capacity, centralized in pore distribution, high in mechanical strength and appropriate in surface acidity.

Description

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Claims

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Application Information

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Owner 一重集团大连工程建设有限公司
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