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Catalytic cracking process of refining biological oil

A catalytic cracking, bio-oil technology, applied in the direction of biological raw materials, petroleum industry, preparation of liquid hydrocarbon mixtures, etc., can solve the problems of high viscosity, instability, poor volatility, etc.

Inactive Publication Date: 2003-07-30
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the quality of bio-oil obtained through various biomass cracking methods is relatively poor. Generally, it has high viscosity, high oxygen content, and poor volatility. Most of them are unstable and easy to corrode, and their calorific value is also low. It will coke at around 120°C
Because the bio-oil obtained from biomass pyrolysis has many shortcomings above and cannot meet the needs of the energy sector, the industry sector hopes that relevant scientific and technical personnel can provide methods to improve the quality of bio-oil to meet the requirements of the energy system for oil quality

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The catalyst used in the experiment is a modified commercially available HZSM-5 zeolite molecular sieve with a particle size of 2 mm. After the test, the catalyst was roasted at high temperature in the air first, and the residual coke was removed to regenerate the catalyst, and then the surface was treated with medical paraffin oil for the next test.

[0017] This example is mainly to investigate the effect of cracking temperature on the conversion rate of feedstock oil and the yield of refined bio-oil. The experiment is carried out at normal pressure and temperature range of 150°C to 600°C. Bio-oil obtained by rapid cracking of sawdust is used as feedstock oil. A catalytic cracking reactor with a catalytic bed size of Φ2×10 cm was used to compare the cracking conversion rate of raw oil and the yield of refined bio-oil at different temperatures. The results are shown in Table 1a. It can be seen from Table 1a that the conversion rate of feedstock oil and the yield of ref...

Embodiment 2

[0020] In the same apparatus as in Example 1, the particle diameter of the catalyst was 2.5 mm, and the reaction temperature was 380° C. This example is mainly to investigate the influence of feed amount to catalyst mass ratio (WHSV) on refined oil yield and raw oil conversion rate, and the results are shown in Table 2. It can be seen from Table 2 that the yield of refined oil increases correspondingly with the increase of WHSV at the beginning, reaching 50.0%, but the WHSV exceeds 3.5h -1 Finally, the yield of refined oil decreased slightly with the increase of WHSV. In addition, the chemical absorption method was used to analyze the non-condensable gas produced by the reaction, and the results showed that at WHSV≤4.5h -1 CO in gas 2 , CO content increased by 6.7% and 5.3% respectively, in other words, the oxygen in bio-oil 2 , The proportion of CO form removal increased. This is exactly what we want, because if O is replaced by H 2 The form of O is removed, and the H co...

Embodiment 3

[0022] In the same device of Example 1, the particle size of the catalyst used was changed and tested, and said catalyst was the same as in Example 1. This embodiment is mainly a comparative test done to compare the influence of the particle size of the catalyst on the reaction result, and the results are shown in Table 3. It can be seen from Table 3 that when the catalyst particle size is large, the effective catalytic activity of the catalyst is relatively low (more catalytic active centers are contained in the catalyst), so the yield of refined oil is low. For a catalyst with a diameter of 5.5 mm, the yield of refined oil is only 8.7%.

[0023] When the particle size of the catalyst is 2.5mm, the reaction temperature is 400°C, and the yield of refined oil can reach 47.8%. Therefore, the smaller particle size is beneficial to the reaction and can be selected within 1.5-4.5mm, but the particle size should be preferred 2.0-3.5mm catalyst. schedule

[0024] Table 1a ...

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Abstract

The present invention relates to a catalytic cracking process of refining biological oil. In a cracking reactor, the biological oil produced through cracking various biomass as material oil is catalytically cracked to eliminate excessive oxygen to obtain high quality refined biological oil in the presence of marketed HZSM-5 zeolite molecular sieve as catalyst and at normal pressure and 200-550 deg.c temperature. The yield may reach 50%. The refined biological oil is not easy to deteriorate at normal temperature, easy to store and transport, and good in burning performance. The present invention is favorable to solve the problem of lacking energy source for human to be faced with.

Description

technical field [0001] The invention relates to a method for catalytic cracking, in particular to a method for catalytic cracking refined bio-oil. Background technique [0002] With the progress of industrialization, human beings consume a large amount of mineral energy, resulting in the gradual depletion of these resources. On the other hand, it has brought serious environmental pollution, and a large amount of carbon dioxide emissions have caused the greenhouse effect. With the increasingly serious environmental problems, the development of clean and renewable energy has increasingly attracted people's attention. In this context, as the only renewable energy that can be converted into liquid fuels, it has become a worldwide consensus to expand and optimize its utilization. Biomass resources mainly include crop waste (straw, fruit shell, corncob, bagasse, etc.); human and animal waste; aquatic plants (algae, water hyacinth, etc.); oil crops (cottons...

Claims

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Application Information

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IPC IPC(8): C10G3/00
CPCY02P30/20
Inventor 颜涌捷郭晓亚任铮伟曹建勤李庭琛张素萍
Owner EAST CHINA UNIV OF SCI & TECH
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