Kütle Transferi

Leaching

Leaching • Leaching is a preferential solution of one or more constituents of solid mixture by contact with a liquid solvent. This unit operation is one of the oldest in the chemical industries. Industrial Application • Leaching is widely used in the biological and food processing industries, such as the separation of sugar from sugar beets with hot water. • The extraction of oils from peanuts, soybeans, sunflower seeds, cotton seeds, and halibut livers. • In pharmaceutical industry, many products are obtained by leaching plant roots, leaves, and stems. •…
The Psychrometric Chart: Theory and Application ( Perry Peralta )

THE PSYCHROMETRIC CHART: Theory and Application Perry Peralta NC State University PSYCHROMETRIC CHART Identify parts of the chart Determine moist air properties Use chart to analyze processes involving moist air … Source: https://www.swst.org/wp/meetings/AM05/peralta.pdf
Psychrometrics

Psychrometrics Outline • What is psychrometrics? • Psychrometrics in daily life and food industry • Psychrometric chart – Dry bulb temperature, wet bulb temperature, absolute humidity, relative humidity, specific volume, enthalpy – Dew point temperature • Mixing two streams of air • Heating of air and using it to dry a product • Psychrometrics is the study of properties of mixtures of air and water vapor • Water vapor – Superheated steam (unsaturated steam) at low pressure – Superheated steam tables are on page 817 of textbook – Properties of…
Kütle ve Enerji Denklikleri Final Sınavı Soruları ( 2005 – 2006 Güz )

KÜTLE VE ENERJİ DENKLİKLERİ 2005-06 GÜZ YARIYILI FİNAL SINAVI Açık kitap ve not – 100 dk 18.01.2006 No : Adı Soyadı : (20) 1. % 4 KM içeren çay ekstraktı 60°C’ta çalışan bir buharlaştırıcıda % 40 KM içeriğine kadar konsantre edilecektir. 200 kg/h debi ve 20°C sıcaklıkta buharlaştırıcıya giren çay ekstraktını konsantre etmek için 120°C’ta buhar olarak girip 90°C’ta su olarak çıkan ısıtma ortamı kullanılacaktır. Konsantre çay daha sonra bir püskürtmeli kurutucuda % 2 nem içeriğine kadar kurutularak kullanıma hazır (instant) çay tozu elde edilecektir. Instant çay tozu üretim…
Absorption Operations in Packed Column

Absorption operations in packed column A packed column is a cylindrical vessel under pressure, filled with a suitable packing material between the internal section 1 and 2. The liquid flows down by gravity through the surface of the packing elements forming a thin film layer around it. The gas rises in counter-current mode with the liquid stream. The mass transfer takes place through the interface film present between the gas and the liquid. The column is now a continuous differential contacting devices. There is no distinguishable stage (like the plates…
Mass and Energy Balances

Chapter 4 Mass and Energy Balances In this chapter we will apply the conservation of mass and conservation of energy laws to open systems or control volumes of interest. The balances will be applied to steady and unsteady system such as tanks, turbines, pumps, and compressors. 4.1 Conservation of Mass The general balance equation can be written as Accumulation = Input + Generation – Output – Consumption The terms (Generation – Consumption) are usually combined to call Generation with positive value for net generation and negative value for net consumption.…
Introduction to Mass Transfer

Introduction to Mass Transfer Introduction Three fundamental transfer processes: i) Momentum transfer ii) Heat transfer iii) Mass transfer Mass transfer may occur in a gas mixture, a liquid solution or solid. Mass transfer occurs whenever there is a gradient in the concentration of a species. The basic mechanisms are the same whether the phase is a gas, liquid, or solid. Definition of Concentration i) Number of molecules of each species present per unit volume (molecules/m3) ii) Molar concentration of species i = Number of moles of i per unit volume…
Isı ve Kütle Transferi Soru Seti

1. Birinde buzdolabı olan, diğerinde olmayan birbirinin aynı iki odanın bütün kapı ve pencereleri kapalıdır, buzdolabı olan oda daha sıcak mı soğuk mu olur? Neden? 2. Bir kış günü, bir evin penceresi olmayan duvarından olan ısı transferinde duvardaki ısı iletim hızını etkileyen faktörleri belirleyiniz. 3. 15 cm çaplı alüminyum küre 80°C’den 200°C’lik bir ortalama sıcaklığa kadar ısıtılacaktır. Bu sıcaklık aralığında ortalama özgül kütle ve özgül ısıyı sırasıyla ρ=2700 kg/m3 ve c = 0.90 p kj/kg°C alarak alüminyum küreye verilmesi gereken ısı miktarını bulunuz. (CEVAP: 515 kj) …