RASHIDUL ISLAM

20121107007

Department of Applied Chemistry and

Chemical Engineering.

BSMRSTU

COURSE TITLE: CHEMICAL TECHNOLOGY-II

COURSE NO: ACCE-462

Sucrose Formation in Sugar cane

• Sucrose forms in sugar cane mainly by

photosynthetic process.

• The photosynthetic process is divided into

two stage

− Photo stage and

− Synthesis stage

Sucrose Formation in Sugar cane

• The photo stage proceeds in the presence of

light

• Synthesis stage is taken place in the darkness.

• The chlorophyll catalyses this process.

Photo Stage

• In this stage light energy is convert to

chemical energy.

• In leaves, water (H2O) molecules break down

and form oxygen (O2), NADPH and ATP

(energy carriers) in the presence of light and

chloroplast.

[ATP= Adenosine triphosphate]

[NADPH= Nicotinamide adenine dinucleotide phosphate]

Photo Stage

Synthesis Stage

• CO2 is Converted into glucose.

• The CO2 react with RuBP and energy from

ATP and NADPH to form G3P (an energy-rich

glucose)

• The G3P is then converted into glucose.

[RuBP= Ribulose-1,5-bisphosphate]

[G3P= Glyceraldehyde 3-phosphate]

Overall Photosynthetic process

Overall Reactions

Constituent of Sugar cane

Name of Constituents Wt. Percentage

Water 73-76

Solid substance 24-27

Fiber 3-5

Soluble solid substance 11-16

Juice constituent sugar 10-16

Constituent of Sugar cane juice

Name of constituents Percentage

Glucose 70-88

Fructose 2-4

Salt 2-4

Protein 0.1-0.5

Gums 0.506

Wax, fats, phosphates 0.3-0.5

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