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Preparation method of red mud-based catalyst for biomass pyrolysis

A biomass pyrolysis and catalyst technology, which is applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of low yield and poor quality of pyrolysis oil, and reduce dependence, The effect of reducing costs, reducing waste of resources and environmental pollution

Pending Publication Date: 2021-06-29
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for preparing a red mud-based catalyst for biomass pyrolysis, which can realize the effective utilization of red mud resources, reduce environmental pollution and treatment costs, and prepare a high-quality catalyst. Solve the problem of poor quality and low yield of biomass pyrolysis oil, and have broad prospects in the field of comprehensive utilization of solid waste and renewable energy technology

Method used

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  • Preparation method of red mud-based catalyst for biomass pyrolysis
  • Preparation method of red mud-based catalyst for biomass pyrolysis
  • Preparation method of red mud-based catalyst for biomass pyrolysis

Examples

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Effect test

Embodiment 1

[0052] The preparation method of the red mud-based catalyst used for biomass pyrolysis of the present invention comprises the following steps:

[0053] Take 30g of pretreated Bayer process red mud, weigh 1.5 times the weight of solid NaOH of the red mud, that is, 45g of solid NaOH, put the two into a mortar and mix and grind until no obvious NaOH solid is visible to the naked eye, and prepare A number of 25ml crucibles are used to hold the mixture of red mud and NaOH, which are sent to the muffle furnace for roasting. The roasting temperature is 500°C, and the roasting time is 35 minutes. Take it out of the muffle furnace in time. After cooling to room temperature, it will be sintered The resulting dark green solid was crushed and ground to below 20 mesh, and 600ml of deionized water was added to form a red mud-alkali solution. The red mud-alkali solution was continuously stirred at a speed of 300r / min for 2 hours with a magnetic stirrer. After stirring, the red mud-alkali solu...

Embodiment 2

[0055] This embodiment is an example of the red mud-based catalyst prepared by the present invention being used for biomass pyrolysis, including the following steps:

[0056] The biomass used in the biomass pyrolysis experiment is corn stalks. The pyrolysis temperature is 600°C, including blank experiments. The biomass pyrolysis heating method is electric heating. The average value of 3 experiments is taken, including the following steps:

[0057] Get 5g of quartz sand that has been pulverized to below 20 meshes, then weigh 3 times its mass of biomass, i.e. 15g of biomass, take a certain amount of second quartz wool 302 and place it on the sintering plate 305 of the electric heating device 202, Weigh 5g of quartz sand and put it on the second quartz wool 302, and spread it flat. The quartz wool can effectively prevent the upper layer of quartz sand from flowing into the lower pipeline from the sintering plate, and then take a certain amount of first quartz wool 304 to pad on t...

Embodiment 3

[0061] This example is another example of the red mud-based catalyst prepared by the present invention being used for biomass pyrolysis. The temperature is 600 ° C. The heating method for biomass pyrolysis is infrared heating. The average value of three experiments is taken, including the following steps:

[0062] Take 5g of the red mud-based catalyst prepared by the present invention, then weigh 3 times the biomass of the biomass, i.e. 15g of biomass, take a certain amount of second quartz wool 302 and place it on the sintering plate 305 of the electric heating device 202. Weigh 5g of the red mud-based catalyst 303 and place it on the second quartz wool 302, spread it flat, the quartz wool can effectively prevent the red mud-based catalyst from flowing into the lowering pipeline, and then take a certain amount of the first quartz wool 304 to pad on the red mud-based On the catalyst 303, the biomass 301 is separated from the red mud-based catalyst 303, which is beneficial to th...

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Abstract

The invention relates to a preparation method of a red mud-based catalyst for biomass pyrolysis, which comprises the following steps of: (1) grinding red mud and alkali together to obtain uniformly mixed solid particles; (2) carrying out high-temperature roasting, crushing, water adding, magnetic stirring and vacuum filtration on the solid particles obtained in the step (1) to remove Fe elements in the solid particles, so as to obtain a solution only containing Si and Al; and (3) carrying out baking and vacuum filtration on the Si and Al solution obtained in the step (2) to obtain the solid red mud-based catalyst. By the adoption of the method, solid waste generated in the aluminum industry can be effectively utilized, the high-quality catalyst can be prepared and applied to biomass pyrolysis, biomass resources are fully utilized, and high-quality oil and gas resources are generated.

Description

technical field [0001] The invention relates to the technical fields of solid waste comprehensive utilization and renewable energy, in particular to a preparation method of a red mud-based catalyst used for biomass pyrolysis. Background technique [0002] As a waste of the aluminum industry, red mud has an annual output of about 70 million tons. A large amount of red mud stockpiles will occupy land, form dust, pollute soil and water, and its treatment will also require huge costs. It is harmful to the aluminum industry and The development of other industries related to the aluminum industry has had a huge impact; and the red mud contains more Si and Al elements, which can be used as the skeleton for the preparation of 4A molecular sieves, so the preparation of catalysts from red mud can become a solid waste green new way of processing. [0003] Biomass is a kind of carbon-neutral renewable energy. It has a wide range of sources and huge reserves in my country, mainly includ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/78B01J37/00B01J37/03B01J37/08C10B53/02
CPCB01J23/78B01J23/002B01J37/031B01J37/082B01J37/0036C10B53/02B01J2523/00B01J2523/12B01J2523/31B01J2523/41B01J2523/842Y02E50/10
Inventor 胡二峰田宜水戴重阳伊枭剑马大朝刘壮李沫杉
Owner CHONGQING UNIV
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