초임계수 하에서 메탄의 메탄올로의 직접 전환

이주헌; Joo Heon Lee

Journal of the Korean Industrial and Engineering Chemistry, Vol.13, No.8, 750-753, December, 2002

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초임계수 하에서 메탄의 메탄올로의 직접 전환

Direct Conversion of Methane to Methanol in Supercritical Water

이주헌 ^†

대구대학교 건설환경공학부, 경북 712-714

Joo Heon Lee^†

Division of Architectura, Civil and Environmental Engineering, Daegu University, Kyungbuk 712-714, Korea

E-mail:

초록

초임계수 하에서 메탄의 메탄올로의 직접전환이 온도범위 400 ~ 450 ℃, 압력 250 bar에서 조사되었다. 메탄 산화반응의 생성물은 CO, CO₂, CH₃OH 등이었다. 메탄과 산소의 전환은 온도와 반응시간이 증가함에 따라 증가하였다. 메탄올의 선택도는 온도가 증가할수록 감소하였고, 최대 선택도는 약 37 %로 410 ℃에서 얻어졌다. 본 연구에서 조사된 실험범위에서 메탄은 초임계수 하에서 안정함을 나타내었다.

The direct conversion of methane to methanol in supercritical water has been investigated over the temperature range of 400 to 450 ℃ at 250 bar. Methane was oxidized to CO, CO₂ and CH₃OH. The conversions of oxygen and methane increased as the temperature and the mean residence time increased. The selectivity to methanol decreased as reaction temperature increased. The highest selectivity to methanol obtained was approximately 37 % at 410 ℃. It was found that in the absence of oxygen, methane was stable in the supercritical water the experimental conditions investigated in this study.

Keywords:supercritical water;methane;methanol;direct conversion

[References]

Foster NR, Appl. Catal., 19, 1 (1985)
Pitchi R, Klier K, Catal. Rev.-Sci. Eng., 28, 13 (1986)
Franck EU, Properties of Water in High Temperature, High Pressure Electrochemistry in Aqueous Solutions, ed. D.C. Jones, 109 (1976)
Tester JW, Holgate HR, Armellini FJ, Webley PA, Killilea WR, Hong GT, Barner HE, Supercritical Water Oxidation Technology: A Review of Process Development and Fundamental Research. 1991 ACS Symposium Series, Atlanta, Georgia, 1, October 1-3 (1991)
Webley PA, Tester JW, Energy Fuels, 5, 411 (1991)
Dixon CN, Abraham MA, J. Supercrit. Fluids, 5, 269 (1992)
Hirth T, Franck EU, Ber. Bunsen. Phys. Chem., 97, 1091 (1993)
Savage PE, Li RK, Santini JT, J. Supercrit. Fluids, 7(2), 135 (1994)
Lee JH, Foster NR, J. Supercrit. Fluids, 9(2), 99 (1996)

[Related Articles]

[1] Foster NR, Appl. Catal., 19, 1 (1985)

[2] Pitchi R, Klier K, Catal. Rev.-Sci. Eng., 28, 13 (1986)

[3] Franck EU, Properties of Water in High Temperature, High Pressure Electrochemistry in Aqueous Solutions, ed. D.C. Jones, 109 (1976)

[4] Tester JW, Holgate HR, Armellini FJ, Webley PA, Killilea WR, Hong GT, Barner HE, Supercritical Water Oxidation Technology: A Review of Process Development and Fundamental Research. 1991 ACS Symposium Series, Atlanta, Georgia, 1, October 1-3 (1991)

[5] Webley PA, Tester JW, Energy Fuels, 5, 411 (1991)

[6] Dixon CN, Abraham MA, J. Supercrit. Fluids, 5, 269 (1992)

[7] Hirth T, Franck EU, Ber. Bunsen. Phys. Chem., 97, 1091 (1993)

[8] Savage PE, Li RK, Santini JT, J. Supercrit. Fluids, 7(2), 135 (1994)

[9] Lee JH, Foster NR, J. Supercrit. Fluids, 9(2), 99 (1996)