Table 3 Specification of intrinsic kinetic model and coke.

From: Feasibility study of coke combustion and energy exergy analysis in the De-Coke process of cracking furnaces in olefin unit

Parameters

Values

Specification of Intrinsic kinetic model

 Mass diffusion limited rate constant

5e- − 12

 Kinetic limited rate pre-exponential factor

0.2215

 Kinetic limited rate activation energy (J/kgmole)

8.23e + 7

 Char porosity

0.01824387

 Tortuosity

1.414214

 Specific internal surface area (m2/kg)

2490.92

 Mean pore radius (m)

6.7954e − 9

Specification of coke

 Ash (ASTM D3174-11)

0.8 (% wt)

 Volatile (ASTEM D3175-11)

0.5 (% wt)

 Fixed C (ASTM D3172-89(02))

98.4 (% wt)

 Sulfur (ASTEM E1915-09)

0.1 (% wt)

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