+1-415-670-9189
info@expertsmind.com
Design variables necessary for sizing equipment
Course:- Chemical Engineering
Reference No.:- EM13368




Assignment Help
Expertsmind Rated 4.9 / 5 based on 47215 reviews.
Review Site
Assignment Help >> Chemical Engineering

Production of Chemicals from Coal

Coal has been considered a major component of U.S. energy reserves for a long time, and more recently it has become an important raw material for the production of chemicals.

The most common coal gasification process involves the reaction of carbon, the primary constituent of coal, with steam to produce carbon monoxide and hydrogen.

C + H2O → Co + H2      (1)

The carbon monoxide and hydrogen can be separated from the other compounds exiting the gasifier and used either as a fuel or a feedstock to a chemical manufacturing process. Simultaneously, oxygen fed to the reactor along with steam reacts with carbon to form carbon dioxide.

C+O2 → CO2    (2)

In addition, there is significant reaction between water and carbon monoxide in the gasifier via the water-gas shift reaction.

CO+H2O ↔ CO2 + H2    (3)

Although Reactions 1, 2 and 3 are the primary reactions in coal gasification, there are important secondary reactions. For example, the hydrogen-rich atmosphere  in the gasification reactor causes the formation of hydrogen sulfide from the sulfur usually found in coal and of small amounts of methane.

S + H2 → H2S

C + 2H2 → CH4

Table: Distribution of Proven Coal Reserves In Billions of Tons

1268_176_Production of Chemicals from Coal.png

Your company has plans to build a plant to convert coal to acetic anhydride, a chemical vital to the company's product line. The plant is to produce 160,000 metric tons of acetic anhydride per year. It is anticipated that the completed process will operate continuously 350 days/ yr. The composition of coal from the nearest deposit is given in Table 2. Judging from the sulfur content, production of significant quantities of H2S is expected. Since H2S poisons (deactivates) catalysts used in the conversion of hydrogen and carbon monoxide into acetic anhydride, it must be removed from the gas leaving the gasifier. It is your responsibility to assist with the setting of design variables necessary for sizing equipment.




Put your comment
 
Minimize


Ask Question & Get Answers from Experts
Browse some more (Chemical Engineering) Materials
Two moles of benzene are mixed with 3 moles of acetonitrile under constant temperature and pressure at 45 °C and 33 kPa. What is the phase of the mixture (vapor, liquid, or
Determine the minimum electric potential difference (in volts) that must be applied to accelerate an a-particle so that on interaction with a hydrogen atom, a ground state ele
There are reports of armed incursions across a border at a critical point on Route A. As a result, the probability of the container being hijacked on Route A must be revised
Conversion is 96%, CAo=CBO=1 mol./lit. If a Mixed reactor tentimes as large as the PFR were hooked up in series with the existing unit, which unit shouldcome first and by wh
CHEN 623 - Applications of Thermodynamics to Chemical Engineering Exam. A continuous ideal gas stream with flow rate equal to 20 moles/s at 900 K and 10 bar enters an adiabat
Hydrogen gives off 120. J/g of energy when burned in oxygen, and methane gives off 50. J/g under the same circumstances. If a mixture of 5.0 g of hydrogen and 10. g of metha
(a) Excess-3 code is a 4-bit binary code for the 10 decimal digits and is found useful in digital computer arithmetic. Each combination is found by adding 3 to the decimal n
The reactor is jacketed by water at a temperature of 200C. The overall heat transfer coefficient has been estimated at 300 J/(m2.s.K), while the heat transfer area is 0.75 m2.