Recovery of by-products: coal, Biology

Recovery of tar: the coke oven gas coming out from ovens is passed through a tower where liquid ammonia is sprayed. The tar and dust are removed and then recovered.

Recover of NH3: the gases are then passed through a tower in which water is sprayed. It is removed as ammonia hydroxide.

                                 NH3 + H2O  404_hydrocarbon.png  NH4OH

Instead Of Water, If Sulphuric Acid Is Sprayed, It forms Ammonium Sulphate Which Can Be Recovered.

                                 2NH4OH + H2SO4  404_hydrocarbon.png (NH4)2SO4 + 2H2O.

Recovery of Naphthalene:  after removal of nh3, the gases are passed through a cooling tower where water at low temperature is sprayed. Naphthalene and some condensed gases are recovered.

Recovery of benzene: it can be recovered by passing the gas through chamber where petroleum is sprayed.

Recovery of H2S :  the gas is passed through chamber containing moist Fe2O3, where it is recovered

                                 Fe2O3 + 3H2404_hydrocarbon.png Fe2S3 + 3H2O

                     Fe2O3 can be regenerated by treating Fe2S3 with air

                                 Fe2S3 + 4O404_hydrocarbon.png2FeO + 3SO2

                                 4FeO + O2 404_hydrocarbon.png 2Fe2O3

The coal gas is recovered and collected in a gas holder after passing through various chambers to removed the by- products. The calorific value of the gas is 5000 kcal/m3.

Posted Date: 7/12/2012 4:45:11 AM | Location : United States







Related Discussions:- Recovery of by-products: coal, Assignment Help, Ask Question on Recovery of by-products: coal, Get Answer, Expert's Help, Recovery of by-products: coal Discussions

Write discussion on Recovery of by-products: coal
Your posts are moderated
Related Questions
Chelating agents Oxalates: Only a few plants contain sufficient amounts of sodium and potassium oxalate to be considered toxic. Moreover, ruminants that consume these plants

Explain the Food Security? You were introduced to the concept of food security in Unit 2. Food security, we learnt, is access by all people at all times to enough food for an a

Explain The Estimated Average Intake (EAR)? Considering that the nutrient requirements follow a normal distribution, the EAR is defined as 'the median usual intake that meets t

Define Conjugation in brief. A form of sexual reproduction in ciliates (Ciliophora). During conjugation two ciliate protozoans join and macronuclei disappears. After meiotic d

DE A T H - It is universal. It is last event in the degenerative process of ageing. It involves widspread cell break down & cell death. There is no heart beat, n

Explain about the Radiation Therapy? Radiation therapy is one of the options for the treatment of various tumors. During the administration of radiation patients experience acu

Explain the Process of Canning? The basic principles of canning have not changed dramatically since Nicholas Appert and Peter Durand developed the process. Heat sufficient to d

What are the factors to an actual shift in the supply curve? Factors which cause an actual shift in the supply curve are described in below: When prices rise or fall this wo

Amphibia n - 3 chambered heart 2 auricles and 1 ventricle. Sinus venosus and truncus arteriosus (its main part is pylengium) present. Incomplete double circulation prese

Q. What are gonads? What are the male and the female gonads in humans? Gonads are the organs that produce gametes they contain the germ cells that undergo division and generate