DESIGN OF AN ABSORBER Problem statement To design an absorber (packed tower) for the absorption of 785.15 kg/h of sodium metabisulphite (Na2S2O5) at an average temperature of 68˚C and Y atm pressure with sulphur dioxide gas counter-currently reacting with Na2SO3 rich feed. Introduction Absorbers are vertical towers used in distillation‚ gas absorption and liquid-liquid extraction processes. Absorbers can be operated co-currently or counter currently. In the former‚ both fluids involved are fed
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CONTENTS PAGE Section Topic Page A Percentages 3 B Interest 3 C Nth Terms 3 D Ratio 4 E Lowest Common Multiples 4 F Highest Common Factors 4 G Prime Numbers 5 H Fractions 5 I Fractions/Decimals/Percentages 6 J Trial and Improvement 6 K Brackets 6 L Factorising 7 M Standard Form 7 N Indices 7 O Angles 8 P Area Formula 8 Q Perimeter 9 R Volume 9 S
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DESIGN CONSIDERATIONS * System: Ethanol – water * Feed rate: 225kmol/h * Feed composition: 28 mol% ethanol * Feed condition: 50% saturated liquid & 50% saturated vapor * 97% of ethanol recovery is required * Operating pressure: 1bar * Distillate composition: 81 mol% ethanol * Column type: Sieve tray column * Operating condition: 70% of flooding Applying material balance to the rectifying section (Eqn 01); V=L+D Applying material balance for the more volatile
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Cajanus cajan (L.) is one of the Pigeon pea cultivated in tropical and subtropical areas. It contains many fractions characterized by their bioactivity and efficacy to enhance biological activities. The aim of the present study was to fingerprinting the Cajanus cajan plant ‚ then extract the flavonoids fraction (FFCC) with methanol extract‚ and assess the antimutagenic efficacy of the fraction extract to reduce genotoxicity induced by cyclophosphamide (CP) using chromosome aberrations‚ in mice bone-marrow
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Assessment BY SHANNON HAYMOND‚ PHD uman life depends on the oxygen transport by hemoglobin. In healthy patients‚ the majority of molecular oxygen (O2) is bound to hemoglobin and only a small fraction is dissolved in blood. But in patients with respiratory problems or certain metabolic and genetic disorders‚ the fraction of oxygenated hemoglobin can fall to dangerously low values. Therefore‚ laboratory assessment of oxygen saturation (SO2)—the percentage of hemoglobin saturated with oxygen—provides an important
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24‚ ...‚ 1536 Answer Finding the sum of a Geometric Series Question Find the sum of each of the geometric series | | Answer Finding the sum of a Geometric Series to Infinity Question Answer Converting a Recurring Decimal to a Fraction Decimals that occurs in repetition infinitely or are
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Book #1‚ Unit #1 Number Simplifying Fractions To change a fraction or a decimal into a percentage‚ multiply it by 100. To change a percentage into a fraction‚ rewrite % as division by 100. To write a fraction as a decimal‚ divide the top number by the number. To change 1/8 into a decimal: divide 1 by 8. 0.125 To change 7/20 into a percentage: multiply by 100. 7/20 x 100 = 35% To simplify 15/1.2: multiply top and bottom by 10. 150/12 = 25/2 = 12.5 Directed Numbers 3 + (-4) = 3 - 4 = - 1 3 - (-4) =
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The removal rate: Applying the formulas explained previously in the exploration‚ the fraction of those removed at time t can be determined by the formula 1/k. In the case of Kenya‚ approximately 800 people die every day. 800/1500000 = 1/1875 or in decimal 0‚00053333 The model assumes this rate is constant throughout and is therefore unprecise
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Here C/Co is the fraction of the single strands remaining. Note that when kCot = 1‚ t → t1/2 = 1/kCo and k = 1/Cot1/2 At that point‚ C/Co = 0.5‚ or one half of the DNA is in the single-stranded form. The equation above could be expressed as: In terms of the fraction of the DNA renatured‚ fren‚ we have:
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taken from the flat regions of the fractional distillation curve. Our unknown mixture contained hexane (bp 69 ºC) and toluene (bp 110.6 ºC). Analysis via gas chromatography allowed us to determine the relative percentage of hexane and toluene at fractions near the beginning and end of our distillations. Relative percentages have been recorded in the table below‚ and our calculations are shown on page 5. Conclusion This week we utilized two methods of distillation (simple and fractional) to separate
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