Comprehensive utilization of oil shale resources in china Xuechun - - PowerPoint PPT Presentation

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Comprehensive utilization

• f oil shale resources in china

Xuechun Xu Jilin University 10 October 2010

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Contents

2 3 3

Introduction of oil shale

3 1

Conclusion Comprehensive utilization

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Introduction of oil shale

retorting oil shale to produce shale oil and gas 1 burning oil shale to generate electricity 2

Oil shale, a fine-grained sedimentary rock containing kerogen, is widespread throughout the world.

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For the conventional oil shale retorting indus- try, there are some problems to solve, such as low shale oil yield, low degree of automation and severe environmental pollution, which restrict economic development.

Introduction of oil shale

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Moreover, retorting and burning both leave behind a great deal of residue. The majority of the ash and semicoke is placed in landfills, which is considered to be a serious environmental problem. These problems have hindered development of the oil shale industry. Therefore, development of a comprehensive approach to oil shale utilization in China is needed.

Introduction of oil shale

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Contents

2 3 3

Introduction of oil shale

3 1

Conclusion Comprehensive utilization

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Comprehensive utilization

Shale oil Oil shale

retorting

Fuel gas Semicoke

Generating electricity

Ash

Ⅰ Ⅱ Ⅲ

Building materials High-tech materials Chemical products

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Conventional oil shale retorting methods have many disadvantages, including low shale

• il yield, low degree of automation and severe

environmental pollution, restricting oil shale

• development. During the test process, the

heating furnace and oil collecting system for the retorting system were remodeled.

• I. Retorting Subsystem

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Oil shale

Main air Regenerative continuous heating furnace Water-oil separator Gas collection tank Retort furnace Cyclone oil trap device Indirect cooling tower Electrostatic oil trap device Desulfurization

Shale oil Fuel gas tank

Fuel gas

Semicoke

• I. Retorting Subsystem

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Cold-cycle gas inlet Hot-cycle gas outlet Heat exchanger Gas outlet combustion furnace Gas inlet

Regenerative continuous heating furnace

• I. Retorting Subsystem

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Indirect cooling tower Cyclone oil trap device Retorting furnace Electrostatic

• il trap device

Desulfuriz ation

• Collecting system of retorting equipment
• I. Retorting Subsystem

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Conclusion:

• 1. The shale oil yield increased by 8%.
• 2. Moreover, environmental pollution has been

reduced.

• 3. The degree of automation and security were

improved.

• I. Retorting Subsystem

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The fuel gas and oil-shale semicoke can be burned to generate electricity in a circulating fluidized bed (CFB) furnace.

II Electricity Generating Subsystem

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Building materials Chemical products High-tech materials cement artificial marble concrete hollow block Silica series Alumina series Luminescence materials Magnetic materials

• III. Ash Processing Subsystem

• III. Ash Processing Subsystem
• 1. Building materials

(1) Cement

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Use of OSA as an clinker additive can produce high- grade cement. Our results indicate that OSA doping of 10 wt.% will yield an optimum compressive strength of 51 Mpa and flexural strength of 8.1 Mpa.

• III. Ash Processing Subsystem
• 1. Building materials

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Testing photos

Compressive

Flexural

• III. Ash Processing Subsystem
• 1. Building materials

(2) Concrete hollow block

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Sand Cement Water Oil shale ash The ingredients and the method of molding simulated standard manufacturing processes of pressed building units. Mixing, molding Air curing 28 days of atmospheric air curing (temperature:18-23℃)

• III. Ash Processing Subsystem
• 1. Building materials

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Testing Mixing Molding Knockout, curing

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Oil shale ash : 30～70 wt.%; Cement: 20 wt.%; content Size Strength (Mpa) Density (Kg/m3) 30% 390*190*190 7.3 1065 40% 390*190*190 6.5 1044 50% 390*190*190 4.5 959 60% 390*190*190 5.2 913 70% 390*190*190 4.9 867 Table 1 Performance testing results of block

• III. Ash Processing Subsystem

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Strength grade C.M. (Mpa) Density range average minimum 1.5 ≥1.5 1.2 ≤600 2.5 ≥2.5 2.0 ≤800 3.5 ≥3.5 2.8 ≤1200

• 5.0

≥5.0 4.0 7.5 ≥7.5 6.0 ≤1400 10.0 ≥10.0 8.0

Table 2 National standard of block

• III. Ash Processing Subsystem

• III. Ash Processing Subsystem
• 1. Building materials

(3) Artificial marble

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Polyester resin Curing agent Accelerating agent Oil shale ash Mixing, molding curing, knockout The effects of physicochemical properties on the perform- ance of samples have been investigated systematically, including the proportion of raw materials, the content of curing agent and accelerating agent and packing size.

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Results: Photos of artificial marble based on oil shale ash SEM micrographs of artificial marble

• III. Ash Processing Subsystem

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Table 3 Detection report of product performance

Technical index GB6566-2001 JC/T202-2001 Results Compression strength / MPa —— ≥50 79 Bending strength / MPa —— ≥7.0 7.4 Radiation specific activity (IRa) ≤1.30 —— 0.67 Radiation specific activity (Ir) ≤1.00 —— 0.45

• III. Ash Processing Subsystem

• III. Ash Processing Subsystem
• 2. Chemical products

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OSA is rich in inorganic elements, including aluminum and silica, which can extracted and used to make chemical products by hydrometallurgical technology. Our experimental results show that the purity of both alumina and silica are higher than 99%, which meets the standards for many industrial applications.

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Stainless Steel reactor Enamel reactor Steam boiler Plate filter Acid-resistant pump

• III. Ash Processing Subsystem

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Sodium meta-aluminate Aluminum hydroxide precipitation Ferric hydroxide Aluminum and ferric hydroxide Filtering

• III. Ash Processing Subsystem

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Alumina

750℃ 140℃

Silica Silicic acid Aluminum hydroxide

• III. Ash Processing Subsystem

• III. Ash Processing Subsystem

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(1) Long lasting phosphor

The alumina obtained in the laboratory can be used to prepare alkali-earth aluminate doped rare-earth long lasting phosphor. luminescent powder luminescent film

• 3. High-tech products

Comprehensive utilization

• 3. High-tech products

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(2) Ferrite microwave absorbing materials

Ferric hydroxide residue, a by-product recovered during the separation of Al2O3 and other metal elements, can be used to make ferrite magnetic materials using the appropriate process conditions. Ferrite Powder

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Contents

2 3 3

Introduction of oil shale

3 1

Conclusion comprehensive utilization

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Conclusion

In summary, using the methods described here,

• il shale can be utilized in such a way that

essentially no solid residue is left unused. This represents a potential route to realizing a green

• il shale industry and is of great significance to

the future of oil shale development in China.

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