Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Desulfurizing adsorbent Ag2O/NaY based on molecular screen and preparation method thereof

A technology of molecular sieves and adsorbents, applied in chemical instruments and methods, other chemical processes, gas fuels, etc., can solve problems such as underutilization of active components, decreased adsorption capacity, and blockage of carrier channels to achieve excellent disulfide The effect of absorbing substances, reducing agglomeration and improving service life

Inactive Publication Date: 2015-01-28
BEIJING UNIV OF CHEM TECH
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the active components loaded too much are likely to cause the aggregation of the active components, or even block the pores of the carrier, resulting in a decrease in the adsorption capacity, and the active components cannot be fully utilized.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Desulfurizing adsorbent Ag2O/NaY based on molecular screen and preparation method thereof
  • Desulfurizing adsorbent Ag2O/NaY based on molecular screen and preparation method thereof
  • Desulfurizing adsorbent Ag2O/NaY based on molecular screen and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0027] Ag of the present invention 2 The preparation method of O / NaY renewable desulfurization adsorbent comprises the following steps:

[0028] (A) NaY molecular sieve raw powder was roasted at 550°C for 4h, and slowly cooled to room temperature;

[0029] (B) Granulating the molecular sieve obtained in step (A) to make 40-60 mesh particles;

[0030] (C) Determination of the water absorption of the carrier. Take a certain amount of the granulated carrier obtained in step (B), and dry it at 110°C to constant weight, then weigh a certain amount of the dried carrier, add distilled water dropwise, shake while adding, until the carrier is completely wet, and There is obvious water present on the container wall, which is no longer adsorbed by the carrier. Record the amount of water absorbed by the carrier per unit mass.

[0031](D) Put a certain amount of the granulated carrier obtained in step (B) and ground urea into a closed container, vacuumize the closed container, and trea...

Embodiment 1

[0045] (A) Weigh 10g of NaY molecular sieve, bake it in a muffle furnace at 550°C for 4 hours, cool slowly to room temperature, and then press it into 40-60 mesh particles; the XRD pattern of NaY molecular sieve is as follows figure 1 As shown, the specific surface area of ​​the NaY molecular sieve carrier measured by the BET method is 541.1m 2 / g.

[0046] (B) Weigh a certain amount of the carrier in (A), dry it in an oven at 110°C to constant weight, weigh 1g of 40-60 mesh NaY molecular sieve carrier particles, and slowly add deionized water dropwise to it, adding lightly while adding Shake lightly until the carrier is completely wet, and there is obvious water on the container wall, which is no longer adsorbed by the carrier. The measured water absorption per unit mass of the carrier is: 1.52 g water / g carrier.

[0047] (C) Weigh 5g of NaY molecular sieve carrier particles of 40-60 mesh, put them together with 1g of urea ground into powder into a closed container for vacu...

Embodiment 2

[0057] Adopt the method of embodiment 1, weigh starting material AgNO respectively 3 0.00g, 0.073g, 0.220g, 0.367g, 0.513g, 0.733g were dissolved in 7.60g deionized water respectively to obtain a desulfurization agent preparation solution, and then the NaY molecular sieve carriers pretreated with urea were impregnated with equal volume and dried , roasted, and cooled to room temperature to obtain Ag 2 Desulfurization adsorbents A1, B1, C1, D1, E1, F1 with O content of 0wt.%, 1wt.%, 3wt.%, 5wt.%, 7wt.%, 10wt.%, respectively.

[0058] The X-ray diffraction pattern of the prepared adsorbent is as follows figure 2 shown. The XRD spectrum of the prepared adsorbent is basically the same as that of the unmodified NaY molecular sieve, indicating that the structure of the molecular sieve is still well preserved during the process of impregnation and roasting, and the modified adsorbent still retains the unique properties of NaY molecular sieve. The pore structure, and no new crysta...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
specific surface areaaaaaaaaaaa
crystallinityaaaaaaaaaa
water absorptionaaaaaaaaaa
Login to View More

Abstract

The invention relates to a desulfurizing adsorbent Ag2O / NaY based on a molecular screen and a preparation method thereof, belonging to the technical filed of desulfurizing adsorbents. The preparation method mainly comprises the steps of carrier pretreatment based on a urea sublimation and desublimation method; incipient impregnation of a NaY type molecular screen by using a silver salt solution and calcining of the Y type molecular screen. The desulfurizing adsorbent Ag2O / NaY based on a molecular screen has an excellent performance of dispersing the active components of carriers and therefore has an excellent adsorbent desulfurizing performance although the content of Ag2O is little; so that an excellent desulfurizing effect with lower cost can be achieved by using the desulfurizing adsorbent based on a molecular screen to remove disulfides in hydrocarbon fuel.

Description

technical field [0001] The present invention relates to a molecular sieve-based adsorbent for deep desulfurization, more particularly, the present invention relates to such molecular sieve-based adsorbent Ag for deep desulfurization 2 O / NaY has excellent dispersibility for active components and excellent ability to remove disulfides at room temperature, and belongs to the technical field of desulfurization adsorbents. Background technique [0002] With the development of petrochemical industry, liquefied petroleum gas (LPG), as a basic chemical raw material and new fuel, has been paid more and more attention by people. Liquefied petroleum gas (LPG) often contains H 2 S, mercaptan and other sulfides, which will cause corrosion of equipment, poisoning and deactivation of catalysts in the subsequent processing, and SO produced by combustion x Pollution of the environment and the formation of acid rain have serious impacts and damages on the ecological environment, human healt...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/18B01J20/30C10L3/12
Inventor 陈标华吕丽丹张傑黄崇品李英霞
Owner BEIJING UNIV OF CHEM TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com