Penjelasan mengenai metode penambangan emas secara heap leachingFull description
Adsorption Processes and DesignDescripción completa
psa
Full description
The solar adsorption Refrigeration system is very useful in rural area without grid. The Adsorber desorber are the important role in this system. Among the adsorbent refrigerant, the activated carbon and ethanol is applied. This paper focuses on the
Descrição completa
Adsorption of acetic acid on charcoal surface
Descripción completa
Adsorption of acetic acid on charcoal surface
oil spillage
A huge amount of waste is generated from the industries which cause the pollution of water this waste is generated by the industries in large quantities. Acids are one such of a waste generated by these industries in the water bodies and causes an ad
ADSORPTION REVIEW QUESTIONS AND PROBLEMS
1. A unit operation wherein specific components of a fluid phase (gas or liquid) are preferentially adhered to the surfaces of the solid a. adsorption c. chemisorption b. absorption d. leaching 2.
The adsorbent used in the purification of hydrocarbon products a. alumina c. fuller's earth b. bone char d. silica gel
3. The component component adsorbed adsorbed in adsorption adsorption operation operation is called called a. adsorbate c. absorbed materials b. adsorbent d. chemisorptions . A type type of adsorption adsorption which which results in in intermolecular intermolecular forces forces of attraction attraction between between molecules of the solid and the substance adsorbed a. gas!phase adsorption c. physical adsorption b. liliquid!phase ad adsorption d. ch chemical ad adsorption ". #ifty parts of copperas and lime per per million parts of dye house effluent remo$es "%& of the color. ow much will be required to reduce the color to "& if n ." * a.12." ppm c. 12%." ppm b. 13% ppm d. 12+." ppm +. ,ater contains organic color which is to be e-tracted with alum and lime. #i$e parts of alum and lime per million parts of water will reduce the color to 2"& of the original color and 1% parts will reduce the color to 3."&. stimate how much alum and lime as parts per million are required to reduce the color to %."& of the original color. a. 1+. c. 1." b. 1. d. 1". /. 0n bleaching bleaching or remo$al remo$al of coloring substance substance of material material such such as coconut coconut oil or sugar decoloriing agents such as acti$ated carbon is used. leaching can be carried out in a single pass or multipass or other methods. 0f %& of the color is remo$ed in a single stage decoloriation with & acti$ated carbon the acti$ated carbon that will be needed to remo$e the same amount of color in a 2!stage counter current decoloriation if n 2 is a. %.%2" c. %.%3 b. %.%223 d. %.% 4roblems 8 and 5 are based on the following information6
0t is required to dry natural gas containing % lbs of water per 1% + ft3 by passing it through a bed of acti$ated alumina gel in two adsorption towers. 7ata6 8atural gas to be dried 7ensity of the alumina gel conomic adsorption factor 9ritical gas $elocity through the tower Temperature of natural gas 4ressure 1 - 1%+ft3:day(2hrs) "% lb:ft & water by weight (dry basis) 3" fpm "%;# 22" psia conomic adsorption factor refers to the amount of adsorbate per amount of adsorbent used. . The height of the tpwer is a. 1.5 ft b. 1%. ft
c. 1".5 ft d. 1.3 ft
5. The weight of the acti$ated alumina gel required is a. 1%%% lbs c. 3%%% lbs b. 2%%% lbs d. 1"%% lbs 1%.Two identical aqueous solutions containing $aluable solute are colored by small amounts of an impurity to a different e-tent. The dar< solution has a color intensity of "% units and the light solution has 2% color units measured on the same arbitrary scale. 0t is desired to treat an equal amount of light and dar< solutions to a color unit of %.". The equilibrium adsorption isotherm on acti$ated carbon is gi$en by Freundlich Equation = m>n where n 1 and m %.%%" with = color units: color units adsorbed:
7etermine the constants m and n of the Freundlich Equation. @se units of mmg cc and gram. a. 1/2.% c. 3% 1./ b. 1/ 1.3/ d. 3%2.% 12.
4hysical adsorption is a. b. c. d.
an irre$ersible phenomenon a re$ersible phenomenon accompanied by e$olution of heat both b and c
a. b. c. d.
9hemisorption (chemical adsorption) is the same as Ban der ,aals adsorption characteried by adsorption of heat also called acti$ated adsorption none of these
13.
1. The rate of adsorption increases as the a. temperature increases b. temperature decreases c. pressure decreases d. sie of adsorbent increases 1". ,hen adsorption hysteresis is obser$ed the desorption equilibrium pressure is a. always lower than that obtained by adsorption b. always higher than that obtained by adsorption c. same as that obtained by adsorption d. dependent on the system which can be either lower or higher than that obtained by adsorption 1+. ,hich of the following adsorbents is used to decolorie yellow glycerine* a. silica gel c. #uller's earth b. alumina d. acti$ated carbon 1/. #reundlich quation applies to adsorption of solute from a. dilute solutions o$er a small concentration range b. gaseous solutions at high pressure c. concentrated solutions d. none of these 1. 0n case of physical adsorption the difference between heat of adsorption and heat of normal condensation is a. equal to the heat of formation of surface compound b. equal to the heat of wetting c. ero d. called integral heat of adsorption
15. 4ic< out the wrong statement Cenerally for physical adsorption a gas of a. higher molecular weight is adsorbed in preference to a gas of low molecular weight b. high critical temperature is adsorbed in preference to a gas of law critical temperature c. low $olatility is adsorbed in preference to a gas of high $olatility d. both b and c 2%. The change in enthalpy per unit weight of adsorbed gas when adsorbed on a gas! free or outgassed adsorbent to form a definite concentration of adsorbate is called its a. integral heat of adsorption c. differential heat of adsorption b. heat of wetting d. heat of normal condensation 21. ,ith an increase in concentration of the adsorbate the integral heat of adsorption a. increases b. decreases c. remains unchanged d. may increase or decreaseD depends on type of adsorbate 22. The change in enthalpy when a unit quantity of gas is adsorbed by a relati$ely large quantity of adsorbent (on which a definite concentration of the adsorbed gas already e-ists) is termed as the a. differential heat of adsorption c. integral heat of adsorption b. heat of wetting d. heat of normal condensation 23. As complete saturation of an adsorbent is approached the differential heat of adsorption approaches a. heat of normal condensation c. ero b. integral heat of adsorption d. none of these 2. 0on e-change process is similar to a. absorption b. e-traction
c. adsorption d. leaching
2". 9%2 can be adsorbed by a. hot cupric o-ide b. heated charcoal