Utilization of LNG as raw materials for chemical industries in Korea was investigated to determine chemical of which the present raw material could be substituted for economically by LNG. It appeared that LNG would have a great potentials as raw materials for synthesis of ammonia, methanol and chlorinated methane.
Chlorination of methane reaction was studied in a thermal fluidized bed with silicagel particles in the range of 80∼100 mesh. Product analysis was carried out by using gas chromatography with TEG on chromosorb W(30%) column. The effects of temperature, feed mole ratio and reaction time on conversion and product distribution was investigated to determine the optimum reaction condition for each chlorinated methane. The data are expressed in the form of second order irreversible rate equation. The calculated value of activation energy and frequency factor at each reaction step are as follows.
$E_1 = 18850 cal/g-mole k_{10} = 4.445 \times 10^9 g-mole/liter.\sec.mole^2$
$E_2 = 16170 cal/g-mole k_{20} = 3.176 \times 10^9 g-mole/liter.\sec.mole^2$
$E_3 = 18110 cal/gr-mole k_{30} = 6.975 \times 10^9 g-mole/liter.\sec.mole^2$
$E_4 = 17800 cal/gr-mole k_{40} = 4.398 \times 10^9 g-mole/liter.\sec.mole^2$
Optimum conditions for each chlorinated methane are as follows.
◁표 삽입▷(원문을 참조하세요)
For a production capacity of 30,000 MT/yr of chlorinated methane with a projected product distribution of 8.33% $CH_3Cl$, 26.67% $CH_2Cl_2$, 28.33% $CHCl_3$ and 36.67% $CCl_4$, a total investment was estimated to be 7.11 million dollar with the rate of return on investment of 27.4%.
