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Process for regeneration of metal-organic framework MOFs adsorbent for deep desulfurization of vehicle diesel

A metal-organic framework and adsorbent regeneration technology, which is applied in the petroleum industry, filter regeneration, refined hydrocarbon oil, etc., can solve the problems that the regeneration rate of the adsorbent cannot be guaranteed, and achieve the effect of reducing energy consumption and load investment

Active Publication Date: 2016-08-17
NANJING TECH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the thermal regeneration process, the regeneration rate of the adsorbent cannot be guaranteed.

Method used

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  • Process for regeneration of metal-organic framework MOFs adsorbent for deep desulfurization of vehicle diesel
  • Process for regeneration of metal-organic framework MOFs adsorbent for deep desulfurization of vehicle diesel
  • Process for regeneration of metal-organic framework MOFs adsorbent for deep desulfurization of vehicle diesel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0020] Implementation case 1: The concentration of atmospheric and vacuum diesel oil after hydrogenation in a refining and chemical enterprise is 346.72 mg S / L. After heat exchange and gas-liquid separation, the hydrogenated diesel oil is passed into the adsorption tower, and the adsorbent is Cu-BTC , when the adsorption breaks through, use carbon dioxide at a temperature of 80°C to regenerate the adsorption tower at a temperature of 150°C and a gas phase space velocity of 210h -1 The regeneration rate of Cu-BTC can reach 80%. When the liquid space velocity is 4h -1 , the adsorption temperature is 40°C, low-sulfur diesel is collected at the lower end, and the dynamic adsorption performance of the regenerated Cu-BTC on atmospheric and vacuum diesel is measured, the relationship diagram is as follows figure 1 As shown, the concentration of sulfide at the outlet is shown in Table 1. from figure 1 It can be seen from Table 1 that the regenerated adsorbent has not yet penetrated...

Embodiment example 2

[0023] Implementation Case 2: Adsorption and desulfurization of FCC diesel in a petrochemical enterprise. After passing the hydrogenated diesel oil into the first adsorption tower, the adsorbent is MIL-100. When the adsorption penetrates, switch to the second adsorption tower, and the first adsorption tower is regenerated. The regeneration gas is nitrogen, and the temperature of the regeneration gas is 150°C, the regeneration temperature of the adsorption tower is 400°C, and the gas phase space velocity at this time is 10h -1 , the regeneration time is 6h, the regeneration rate of MIL-100 is 100%, when the first adsorption tower is adsorbed again, the liquid phase space velocity is 10h -1 , the adsorption temperature is 90°C, low-sulfur diesel oil is collected at the lower end, the concentration of sulfide at the outlet changes with time as figure 2 shown. from figure 2 It can be seen from the figure that the regenerated adsorbent achieves breakthrough after adsorption an...

Embodiment example 3

[0024] Implementation case 3: Adsorption desulfurization of coked diesel oil in a petrochemical enterprise, after the hydrogenated diesel oil is passed into the first adsorption tower, when the adsorbent is MIL-101, the liquid phase space velocity is 150h -1 , when the temperature is 30°C, measure the variation of sulfide concentration at the outlet with time. After the adsorption breakthrough, switch to the second adsorption tower to regenerate the first adsorption tower. The regeneration gas is helium, the regeneration gas temperature is 200°C, the regeneration temperature of the adsorption tower is 600°C, and the gas phase space velocity is 500h -1 The regeneration rate of MIL-101 can reach 80% when the first adsorption tower is regenerated for 12 hours under the same conditions. After regeneration, when the first adsorption tower performs adsorption again, the liquid phase space velocity is 150h -1 , when the temperature is 30°C, low-sulfur diesel oil is collected at the ...

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Abstract

The invention relates to a process for regenerating an automobile diesel deep-desulphurization MOFs (metal organic frameworks) adsorbent. A hot-purging regeneration process is adopted and comprises the following steps: high-sulfur diesel is hydrofined until the sulfur concentration is consistent with a national III standard (the sulfur concentration is less than 350ppm), is subjected to heat exchange, and enters a gas-liquid separation tank, national III diesel is separated, and is introduced into an absorption tower, low-sulfur diesel (with sulfur concentration of less than 10ppm) is collected at the top of the tower, insert gas is used for thermally regenerating an absorbent in a second adsorption tower during the adsorption of the adsorption tower, and tail gas enters a sulfur recycling device. According to the process, national V low-sulfur diesel can be effectively obtained; the adsorbent is easy to regenerate, a process flow is simple, and has good economic benefits, the problem of load of a conventional intermediate-pressure hydrofining device for the production of national III diesel is solved, and the equipment investment and the running cost are lowered.

Description

technical field [0001] The invention relates to a thermal regeneration process, in particular to a process for the regeneration of metal organic framework MOFs adsorbents for deep desulfurization of vehicle diesel oil, which can meet the requirements for the production of national V standard diesel oil. It belongs to the field of chemical technology. Background technique [0002] In recent years, my country's diesel quality standards have been continuously upgraded. Compared with foreign clean diesel quality standards, there is still a large gap in the quality of my country's petroleum products. From July 1, 2011, my country has fully replaced the National III diesel oil for vehicles (GB19147- 2009), requiring the sulfur content to drop below 350ppm. After 2015, my country will fully implement the National IV diesel standard, and will release the fifth phase of vehicle diesel standard at the end of June 2013, that is, the sulfur content in diesel is not more than 10ppm, and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/34B01J20/22C10G25/12
Inventor 崔群汤磊王海燕李卫卫
Owner NANJING TECH UNIV
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