Dissertation > Excellent graduate degree dissertation topics show

Sorbents for Hot-gas Desulfurization Prepared by Ultrasound-assisted Impregnation and Sol-gel Method

Author: SunJianFeng
Tutor: LiuJianZhong；WangZhiHua
School: Zhejiang University
Course: Energy and Environmental Engineering
Keywords: ultrasonic impregnation sol-gel H2S coal gasification high temperature desulfurization carrier
CLC: X701.3
Type: Master's thesis
Year: 2010
Downloads: 89
Quote: 0
Read: Download Dissertation

Abstract


Hot-gas desulfurization sorbents were prepared by three methods respectively, including ultrasound-assisted impregnation method, classical impregnation method and sol-gel method. The physical and chemical properties of sorbents were analyzed by means of ICP-AES, SEM, and XRD. The desulfurization activities of high temperature desulfurization sorbents were studied in a fixed-bed reactor. The results are as follows.(1) Six hot-gas desulfurization metal sorbents including Fe, Mn, Cu, Ce, Ca and Zn were prepared by an ultrasound-assisted impregnation method and by a classical impregnation method. ICP results showed that the use of ultrasond increased the content of active ingredient in the sorbents, improved the pore structure, and thinned the particles. SEM results revealed that the sorbents was small in granule, uniform grading and less sintering with ultrasonic treatment. XRD results showed that the use of ultrasond had an affect on the dispersion of crystal grain. The activity test results indicated that the desulfurization activity of the sorbents prepared by ultrasound impregnation was much higher than those without ultrasonic treatment, especially for the Fe sorbent. The desulfurization activity order of the six metal sorbents is Fe>Mn>Cu>Ce>Ca>Zn.(2) Three hot-gas desulfurization metal sorbents including Mn/SiO2, Mn/TiO2, and Mn/γ-Al2O3, were prepared by ultrasound-assisted impregnation method for the purpose of studying the effect of the carrier. The carrier study showed that, Mn/γ-Al2O3 got higher BET surface area and better performance, was fit for IGCC hot-gas desulfurization. But Mn/SiO2 cannot keep the H2S concentration at a low level in a long time, and Mn/TiO2 was bad in high temperature stability.(3) Mn desulfurization sorbents were prepared by an ultrasound-assisted impregnation method and a sol-gel method with the same load. The sol-gel method got higher BET surface area, better performance and activity. XRD results showed that Mn active ingredient was in uniform distribution, which is good for the desulfurization reaction. The activities of the sorbents increased with the increasing of the temperature. In short, sol-gel method gets better performance, but in high price and with difficult preparation. It is still difficult to get a widely industry application now.

Related Dissertations

  1. High Dynamic Carrier Tracking Algorithm of Software GNSS Receiver,P228.4
  2. Preparation and Photocatalytic Properties for Water Decomposition of Titanate Photocatalyst,O643.36
  3. Preparation of ITO Quai-1D Nanostructures by Sol-Gel Method Combined with Porous Anodic Aluminum Oxide Template,TB383.1
  4. Study on the Synthesis Bi3.25La0.75Ti3O12（BLT） Nanotubes and Nano Wires,TB383.1
  5. Preparation and Electrocaloric Effect of BaxSr1-xTiO3 Ferroelectric Thin Films,TB383.2
  6. Real-Time Power-Stealing Monitoring and Arrear Management System,TM73
  7. Experimental Study and Analyses of O2 -CO2 Production Based on Chemical Looping Method,O611.3
  8. Experimental and Simulation Study on Gasification Characteristics of Huainan Coal,TQ546
  9. Study on Using Sepiolite As Supported Catalysts in Selective Hydrogenation of Cinnamaldehyde to Cinnamyl Alcohol,O643.32
  10. Investigation on Gasification Characteristics of Pulverized Coal in Entrained Flow Gasifier Based on Flameless Oxidation,TQ546
  11. Research on the Down-hole Data Sampling and Transmission Method,TE938
  12. Preparation and Properties of Chitosan-based Thermosensitive Composite Hydrogel,R943
  13. Preparation and Performance of V2O5-WO3/MOx/Cordierite Catalyst Modified with Cu、Mn、Ce for DeNOx,X701
  14. Study on Ideological and Political Education in Higher Vocational College Based on Team Training,G711
  15. Campus Culture Activities Construction Based on the Innovative Quality of College Students,G641
  16. Iron, lanthanum -doped nano TiO \u003csub\u003e 2 \u003c/ sub\u003e Preparation and photocatalytic properties,O614.411
  17. A Study of the Methods to Reduce Peak-to-average Power Ratio of MIMO-OFDM System,TN919.3
  18. Study on Fatigue Life Assessment and Dynamic Fracture of Ship Structure,U661.4
  19. Fabrications and Applications of Microelectrode Array of Silicon Dioxide Cavities and Magnetic Ferroferric Oxide Nano-Bioconjunctions,TB383.1
  20. Study on the Design of Wicker Household Products as Style Carrier,TS935.53
  21. Ash and Slag Formation in Opposed Multi-burner Coal-water Slurry Gasifier,TQ547

CLC: > Environmental science, safety science > Processing and comprehensive utilization of waste > General issues > Exhaust gas processing and utilization > Desulfurization and desulfurization
© 2012 www.DissertationTopic.Net  Mobile