Dissertation > Excellent graduate degree dissertation topics show

Preparation of Reducing Sugar Using Rice Straw Pretreated by Ionic Liquid and the Recycle of the Ionic Liquid

Author: LiYingYing
Tutor: GongGuiFen
School: Harbin University of Science and Technology
Course: Materials Science
Keywords: Ionic liquid synthesization straw cellulose reducing sugar recycle
CLC: TQ352.6
Type: Master's thesis
Year: 2013
Downloads: 9
Quote: 0
Read: Download Dissertation

Abstract


Nowadays, we face with the challenges of the shortage of resources and theissues of environment. Much attention has been paid to biological energy source(BER), owning to its advantages of its great potentiality of raw material and lowcost and so on. The main function of the BER is an alternative to fossil energy,protecting the environment and promoting rural economic development. Chineserice production is the first place in the world, with a wealth of reserve resources.From the perspective as the economic value, environmental protection, and newenergy, we adopt ionic liquid in the pretreatment of straw and utilize processedcellulose and cellulase to prepare the reducing sugar. Then the recycled ionicliquid is utilized in the processing of straw to study the performance of therecycled ionic liquid.In the experiment, we have prepared the [AMM]Cl, and its structure wasdetermined through FT-IR and1HNMR. Rice straw cellulose was dissolved in theionic liquids, then the mechanism of the process was investigated by studying theinfluence factors (the ratio of solid-liquid, temperature, and dissolving time).Then the most appropriate parameters of solution were obtained: the ratio ofsolid-liquid is1:9,110℃and2hours.The recovery of the waste ionic liquid [AMIM]Cl reached90%through themethod of the reduced pressure distillation. The structure of [AMIM]Cl was notchanged after recovery by FT-IR and1HNMR spectrum analysis. The [AMIM]Clwas used5time, the reducing sugar conversion rate reduces from82.08%to44.44%(the reducing sugar conversion rate of the untreated straw is31.94%),and the ionic liquid recovery rate decreases reduces from90%to25.32%.Through the SEM observation of the regenerated cellulose’s microstructure, we found, the damage for cellulose will be weakened with used times of ionicliquids increasing.The residues, what was separated after recycle of [AMIM]Cl, is the keyfactors in the decline of recycle rate. The mixture components are analyzed usingthese methods (SEM, FT-IR and XPS). The mixture contains straw by theanalysis of the morphology; It proved that there is [AMIM]Cl in the residues byFT-IR and C1s, O1s, N1s and Cl2p determined by XPS. The residues is mixtureof straw and [AMIM]Cl.

Related Dissertations

  1. Synthesis and Characterization of Monovalent, Divalent Imidazolium Ionic Liquids Containing Hydrocarbons,O621.3
  2. Cellulose Pretreatment with Ionic Liquid for Enzymatic Hydrolysis,TQ352.1
  3. Research of Resource and Recycling on Pig Excretion in Wenzhou,X713
  4. Studies on the Influence of Thiol-Functional Ionic Liquids on CdSe Quantum Dots,O649
  5. Studies on the Dissolution of Chitosan in Ionic Liquids,O636.1
  6. Engineering Design on the Treatment and Reuse of Coal Mine Drainage,X752
  7. Application of Temperature-Controlled Ionic Liquid Micro-Extraction in Environmental Analytical Chemistry,X132
  8. Isolation of Highly Purified Cellulose from Wheat Straw and Its Application,X712
  9. Construction of Protic Ionic Liquid Modified Electrode and Its Enhanced Action in Direct Electron Transfer of GOD,O646
  10. Study on the Performance of Mixing in the Jep Loop Reactor,TQ052
  11. Study on Chemical Coloring and Sealing Processing of Stainless Steel,TG177
  12. The Researchon Circular Economy Development of Baishan City,F127
  13. Shape Memory cellulose membrane preparation,TS195.55
  14. A Class of Complexes of Rare-Earth-Metals with Schiff Base Ligands, Preparation and Application,O643.36
  15. Optimizing the GZSZ’s Operation Manage of the Recycled Asphalt Concrete Produced,F426.92
  16. Preliminary Study on Capturing CO2 by Chemical Absorption,X51
  17. Study on Hydrogenation and Characterization of Recycle Solvent for High Inertinite Shenhua Direct Coal Liquefaction,TQ529.1
  18. Preparation of Rapeseed Protein from Rapeseed Meal in a Reverse Micelle System and the Study on Its Stpwise Enzymatic Hydrolysis,S511
  19. The Research and Design of the New Type Energy Efficient Charger,TM910.6
  20. Synthesis of β1, 6-Glucan Based on Ionic Liquid-Supported Methed,O621.3
  21. Research on the Degradation of Straw Fiber for Chemical Derivatives Development,TQ352

CLC: > Industrial Technology > Chemical Industry > Fiber quality of the chemical processing industry > Cellulose chemical processing industry > Production process
© 2012 www.DissertationTopic.Net  Mobile