molecular distillation and packed columm distillation
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Theory of molecular distillation:- The mean free path of a molecule is defined as the average distance through which a molecule can move without coming into collision with another. For material that are regarded as non volatile under ordinary conditions of temperature and pressure are generally removed by this by increasing the mean free path. Characteristics of the molecular distillation process:- Very high vacuum Evaporating surface must be close to the condensing surface The liquid area is large to avoid boiling and evolution of the vapors is from surface only. Packed distillation columns Packed columns are used for distillation, gas absorption and liquid-liquid extraction. The gas-liquid contact in a packed column is continuous, not stage-wise, as in a plate column.The liquid flows down in the column over a packing surface and the vapor (or the gas) movescounter-currently, up the column. The performance of a packed column is very dependent onthe maintenance of good liquid and gas distribution through the packed bed, and this is animportant consideration in packed column design
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Gas Absorption & Stripping in Chemical Engineering (Part 3/4)
COURSE LINK:
https://www.chemicalengineeringguy.com/courses/gas-absorption-stripping/
Introduction:
Gas Absorption is one of the very first Mass Transfer Unit Operations studied in early process engineering. It is very important in several Separation Processes, as it is used extensively in the Chemical industry.
Understanding the concept behind Gas-Gas and Gas-Liquid mass transfer interaction will allow you to understand and model Absorbers, Strippers, Scrubbers, Washers, Bubblers, etc…
We will cover:
- REVIEW: Of Mass Transfer Basics required
- GAS-LIQUID interaction in the molecular level, the two-film theory
- ABSORPTION Theory
- Application of Absorption in the Industry
- Counter-current & Co-current Operation
- Several equipment to carry Gas-Liquid Operations
- Bubble, Spray, Packed and Tray Column equipments
- Solvent Selection
- Design & Operation of Packed Towers
- Pressure drop due to packings
- Solvent Selection
- Design & Operation of Tray Columns
- Single Component Absorption
- Single Component Stripping/Desorption
- Diluted and Concentrated Absorption
- Basics: Multicomponent Absorption
- Software Simulation for Absorption/Stripping Operations (ASPEN PLUS/HYSYS)
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Chromatography الشيت الثالث.ppt
Gas chromatography (GC) is a technique used to separate volatile organic compounds by injecting a sample into a carrier gas stream that flows through a column. The components separate based on interactions with the stationary phase in the column and exit at different retention times. Key components of a GC system include the carrier gas, injector, chromatographic column, temperature control system, and detector. Common detectors are the thermal conductivity detector, flame ionization detector, and electron capture detector.
Gas Chromatography
Gas chromatography head points:
Invention of Chromatography
original chromatography Experiment
Common types of chromatography
Paper and Thin layer chromatography
How does chromatography work?
Theoretical Plate
gas chromatography
schematic of GC
carrier gas-supply
Injection port
sample Injection system
split/spitless Injection
sample valves
GC columns
open tubular columns
Temperature Control
Solid Support Materials
Particle size of Supports
The stationary Phase
Detection systems
Characteristics of the Ideal Detector
Flame Ionization Detectors
Thermal Conductivity Detector
Electron-capture Detectors
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lecture-8-gc c.pptx
Gas chromatography is a technique used to separate components of a vaporized sample mixture based on their differential partitioning between a mobile gaseous phase and a stationary liquid or solid phase. The sample is injected into a heated injector and vaporized before entering the chromatographic column containing the stationary phase. Components of the sample migrate through the column at different rates depending on their affinity for the stationary phase, resulting in separation. Common detectors include the flame ionization detector (FID), thermal conductivity detector (TCD), and electron capture detector (ECD).
Similar to molecular distillation and packed columm distillation (20)
Gas Absorption & Stripping in Chemical Engineering (Part 2/4)
Gas Absorption & Stripping in Chemical Engineering (Part 2/4)
Gas Absorption & Stripping in Chemical Engineering (Part 3/4)
Gas Absorption & Stripping in Chemical Engineering (Part 3/4)
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一.毕业证【微bwp0011】成绩单、使馆认证、教育部认证、雅思托福成绩单、学生卡等！
二.真实使馆公证(即留学回国人员证明,不成功不收费)
三.真实教育部学历学位认证（教育部存档！教育部留服网站永久可查）
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如果您处于以下几种情况：
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原件一模一样【微信：95270640】【旧金山大学毕业证USF学位证成绩单】【微信：95270640】（留信学历认证永久存档查询）采用学校原版纸张、特殊工艺完全按照原版一比一制作（包括：隐形水印，阴影底纹，钢印LOGO烫金烫银，LOGO烫金烫银复合重叠，文字图案浮雕，激光镭射，紫外荧光，温感，复印防伪）行业标杆！精益求精，诚心合作，真诚制作！多年品质 ,按需精细制作，24小时接单,全套进口原装设备，十五年致力于帮助留学生解决难题，业务范围有加拿大、英国、澳洲、韩国、美国、新加坡，新西兰等学历材料，包您满意。
【业务选择办理准则】
一、工作未确定，回国需先给父母、亲戚朋友看下文凭的情况，办理一份就读学校的毕业证【微信：95270640】文凭即可
二、回国进私企、外企、自己做生意的情况，这些单位是不查询毕业证真伪的，而且国内没有渠道去查询国外文凭的真假，也不需要提供真实教育部认证。鉴于此，办理一份毕业证【微信：95270640】即可
三、进国企，银行，事业单位，考公务员等等，这些单位是必需要提供真实教育部认证的，办理教育部认证所需资料众多且烦琐，所有材料您都必须提供原件，我们凭借丰富的经验，快捷的绿色通道帮您快速整合材料，让您少走弯路。
留信网认证的作用:
1:该专业认证可证明留学生真实身份【微信：95270640】
2:同时对留学生所学专业登记给予评定
3:国家专业人才认证中心颁发入库证书
4:这个认证书并且可以归档倒地方
5:凡事获得留信网入网的信息将会逐步更新到个人身份内，将在公安局网内查询个人身份证信息后，同步读取人才网入库信息
6:个人职称评审加20分
7:个人信誉贷款加10分
8:在国家人才网主办的国家网络招聘大会中纳入资料，供国家高端企业选择人才
→ 【关于价格问题（保证一手价格）
我们所定的价格是非常合理的，而且我们现在做得单子大多数都是代理和回头客户介绍的所以一般现在有新的单子 我给客户的都是第一手的代理价格，因为我想坦诚对待大家 不想跟大家在价格方面浪费时间
对于老客户或者被老客户介绍过来的朋友，我们都会适当给一些优惠。
选择实体注册公司办理，更放心，更安全！我们的承诺：可来公司面谈，可签订合同，会陪同客户一起到教育部认证窗口递交认证材料，客户在教育部官方认证查询网站查询到认证通过结果后付款，不成功不收费！
办理旧金山大学毕业证毕业证学位证USF学位证【微信：95270640 】外观非常精致，由特殊纸质材料制成，上面印有校徽、校名、毕业生姓名、专业等信息。
办理旧金山大学毕业证USF学位证毕业证学位证【微信：95270640 】格式相对统一，各专业都有相应的模板。通常包括以下部分：
校徽：象征着学校的荣誉和传承。
校名:学校英文全称
授予学位：本部分将注明获得的具体学位名称。
毕业生姓名：这是最重要的信息之一，标志着该证书是由特定人员获得的。
颁发日期：这是毕业正式生效的时间，也代表着毕业生学业的结束。
其他信息：根据不同的专业和学位，可能会有一些特定的信息或章节。
办理旧金山大学毕业证毕业证学位证USF学位证【微信：95270640 】价值很高，需要妥善保管。一般来说，应放置在安全、干燥、防潮的地方，避免长时间暴露在阳光下。如需使用，最好使用复印件而不是原件，以免丢失。
综上所述，办理旧金山大学毕业证毕业证学位证USF学位证【微信：95270640 】是证明身份和学历的高价值文件。外观简单庄重，格式统一，包括重要的个人信息和发布日期。对持有人来说，妥善保管是非常重要的。
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原版一模一样【微信：741003700 】【(osu毕业证书)美国俄勒冈州立大学毕业证成绩单】【微信：741003700 】学位证，留信认证（真实可查，永久存档）原件一模一样纸张工艺/offer、雅思、外壳等材料/诚信可靠,可直接看成品样本，帮您解决无法毕业带来的各种难题！外壳，原版制作，诚信可靠，可直接看成品样本。行业标杆！精益求精，诚心合作，真诚制作！多年品质 ,按需精细制作，24小时接单,全套进口原装设备。十五年致力于帮助留学生解决难题，包您满意。
本公司拥有海外各大学样板无数，能完美还原。
1:1完美还原海外各大学毕业材料上的工艺：水印，阴影底纹，钢印LOGO烫金烫银，LOGO烫金烫银复合重叠。文字图案浮雕、激光镭射、紫外荧光、温感、复印防伪等防伪工艺。材料咨询办理、认证咨询办理请加学历顾问Q/微741003700
【主营项目】
一.毕业证【q微741003700】成绩单、使馆认证、教育部认证、雅思托福成绩单、学生卡等！
二.真实使馆公证(即留学回国人员证明,不成功不收费)
三.真实教育部学历学位认证（教育部存档！教育部留服网站永久可查）
四.办理各国各大学文凭(一对一专业服务,可全程监控跟踪进度)
如果您处于以下几种情况：
◇在校期间，因各种原因未能顺利毕业……拿不到官方毕业证【q/微741003700】
◇面对父母的压力，希望尽快拿到；
◇不清楚认证流程以及材料该如何准备；
◇回国时间很长，忘记办理；
◇回国马上就要找工作，办给用人单位看；
◇企事业单位必须要求办理的
◇需要报考公务员、购买免税车、落转户口
◇申请留学生创业基金
留信网认证的作用:
1:该专业认证可证明留学生真实身份
2:同时对留学生所学专业登记给予评定
3:国家专业人才认证中心颁发入库证书
4:这个认证书并且可以归档倒地方
5:凡事获得留信网入网的信息将会逐步更新到个人身份内，将在公安局网内查询个人身份证信息后，同步读取人才网入库信息
6:个人职称评审加20分
7:个人信誉贷款加10分
8:在国家人才网主办的国家网络招聘大会中纳入资料，供国家高端企业选择人才
办理(osu毕业证书)美国俄勒冈州立大学毕业证【微信：741003700 】外观非常简单，由纸质材料制成，上面印有校徽、校名、毕业生姓名、专业等信息。
办理(osu毕业证书)美国俄勒冈州立大学毕业证【微信：741003700 】格式相对统一，各专业都有相应的模板。通常包括以下部分：
校徽：象征着学校的荣誉和传承。
校名:学校英文全称
授予学位：本部分将注明获得的具体学位名称。
毕业生姓名：这是最重要的信息之一，标志着该证书是由特定人员获得的。
颁发日期：这是毕业正式生效的时间，也代表着毕业生学业的结束。
其他信息：根据不同的专业和学位，可能会有一些特定的信息或章节。
办理(osu毕业证书)美国俄勒冈州立大学毕业证【微信：741003700 】价值很高，需要妥善保管。一般来说，应放置在安全、干燥、防潮的地方，避免长时间暴露在阳光下。如需使用，最好使用复印件而不是原件，以免丢失。
综上所述，办理(osu毕业证书)美国俄勒冈州立大学毕业证【微信：741003700 】是证明身份和学历的高价值文件。外观简单庄重，格式统一，包括重要的个人信息和发布日期。对持有人来说，妥善保管是非常重要的。
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The core idea of this project to minimize the paper work and centralize the
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molecular distillation and packed columm distillation
- 1. Submitted to:- Mr. M. Alam HOD (Chemical Department) Submitted by:- Kuldeep Patidar B.tech 3rd year 5th sem. 12MUBCHE003 Chemical Engineering
- 2. Molecular Distillation Theory of molecular distillation:- The mean free path of a molecule is defined as the average distance through which a molecule can move without coming into collision with another. For material that are regarded as non volatile under ordinary conditions of temperature and pressure are generally removed by this by increasing the mean free path. Characteristics of the molecular distillation process:- Very high vacuum Evaporating surface must be close to the condensing surface The liquid area is large to avoid boiling and evolution of the vapors is from surface only.
- 3. Molecular Distillation (cont.) • Application of molecular distillation:- Purification of oils Separating of vitamins
- 4. Packed distillation columns Packed columns are used for distillation, gas absorption and liquid-liquid extraction. The gas-liquid contact in a packed column is continuous, not stage-wise, as in a plate column.The liquid flows down in the column over a packing surface and the vapor (or the gas) movescounter-currently, up the column. The performance of a packed column is very dependent onthe maintenance of good liquid and gas distribution through the packed bed, and this is animportant consideration in packed column design.
- 5. Advantages and disadvantages for the plate and the packed columns 1. Plate columns can be designed to handle a wider range of liquid and gas flow ratesthan packed columns. 2. Packed columns are not suitable for very low liquid flow rates. 3. The efficiency of a plate can be predicted more accurately than the equivalent terms ofpackings (HETP or HTU). 4. For corrosive liquids a packed column will usually be cheaper than the equivalentplate column. 5.The liquid hold-up is lower in a packed column than in a plate column. This can beimportant when the hold-up of toxic or flammable liquids must be kept as small aspossible for safety reasons. 6. Packed columns are more suitable for handling foaming systems. 7. The pressure drop can be lower in a packed column than the equivalent plate column.
- 6. The design procedure of a packed column consists of the following steps:- 1. Select the type and size of packing. 2. Determine the column height required for the specified separation. 3. Determine the column diameter (capacity), to handle the liquid and vapor flow rates. 4. Select and design the column internal features: packing support, liquid distributor and redistributors.
- 7. 1. Determination of the column height 1.1. The theoretical stage method If at a point of the distillation column the concentration of the liquid flow is x, and theconcentration of the counter-current vapor flow at the same point is y, then there is a heightabove this point where the concentration of the vapor flow (y*) is in equilibrium with x. This section is the Height Equivalent a Theoretical Plate (HETP).
- 9. The value of ma can be determined by the following method:
- 10. 1.2. The transfer unit method The transfer unit is a part of column height where the change in vapor concentration equals tothe average driving force. The driving force is the difference between the equilibrium (y*) andthe actual (y) vapor concentration. The column height can be computed by Eq. 4. H = HTU ⋅ NTU _________________________(4) where HTU Height of a Transfer Unit [m] NTU Number of Transfer Units [-]