Measurement of Multicomponent Diffusion in Liquids Using Raman Microspectroscopy

Description: Measurement of Multicomponent Diffusion in Liquids Using Raman Microspectroscopy and Microfluidics by Dr Christine Jutta Peters Estimated delivery 3-12 business days Format Paperback Condition Brand New Description Diffusion is the rate-limiting mass transport step in many (bio)chemical processes. Diffusion data is therefore necessary to design unit operations, e.g., extraction. However, diffusion data on multicomponent mixtures in liquids are scarce, as diffusion measurements are intrinsically time-consuming and laborious. Also, several measurements are required for one diffusion coefficient matrix in a multicomponent mixture.Microfluidics promises to reduce experiment time and experimental effort, while Raman spectroscopy reduces the number of necessary experiments for multicomponent mixtures. To reduce the measurement effort for diffusion coefficients in multicomponent mixtures, microfluidics and Raman microspectroscopy were combined in this work for the first time for the measurement of diffusion coefficient matrices in multicomponent mixtures: Two liquids of different concentrations co-flow in parallel in a microfluidic H-cell, while changes of concentration due to diffusion are quantified locally using Raman microspectroscopy. From these changes of concentration, the diffusion coefficient matrix is determined in a least squares procedure using a convection-diffusion-model. Thereby, diffusion coefficient matrices can be determined from a single experiment, while the known initial concentrations together with quantitative Raman spectroscopy spare additional calibration measurements. The experiment takes less than 1h and the sample consumption is below 6mL.The developed method to determine diffusion coefficients was validated for binary and ternary systems. Additionally, new diffusion data was measured for a binary, a ternary and a quaternary system. Two and three experiments are sufficient to determine diffusion coefficient matrices with accuracy and precision for ternary and quaternary systems respectively. Systems used for validation agree with literature data. Thus, diffusion coefficient matrices of multicomponent mixture can be provided with small effort and in short time to enable the design of unit operations. Details ISBN 395886337X ISBN-13 9783958863378 Title Measurement of Multicomponent Diffusion in Liquids Using Raman Microspectroscopy and Microfluidics Author Dr Christine Jutta Peters Format Paperback Year 2020 Pages 244 Publisher Verlag G. Mainz GE_Item_ID:160662328; About Us Grand Eagle Retail is the ideal place for all your shopping needs! With fast shipping, low prices, friendly service and over 1,000,000 in stock items - you're bound to find what you want, at a price you'll love! Shipping & Delivery Times Shipping is FREE to any address in USA. Please view eBay estimated delivery times at the top of the listing. Deliveries are made by either USPS or Courier. We are unable to deliver faster than stated. International deliveries will take 1-6 weeks. NOTE: We are unable to offer combined shipping for multiple items purchased. This is because our items are shipped from different locations. Returns If you wish to return an item, please consult our Returns Policy as below: Please contact Customer Services and request "Return Authorisation" before you send your item back to us. Unauthorised returns will not be accepted. Returns must be postmarked within 4 business days of authorisation and must be in resellable condition. Returns are shipped at the customer's risk. We cannot take responsibility for items which are lost or damaged in transit. For purchases where a shipping charge was paid, there will be no refund of the original shipping charge. Additional Questions If you have any questions please feel free to Contact Us. Categories Baby Books Electronics Fashion Games Health & Beauty Home, Garden & Pets Movies Music Sports & Outdoors Toys

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