철-수증기 반응에 의한 수소생성에 미치는 금속산화물의 첨가효과

이대행; 문희; 박흥철

Journal of the Korean Industrial and Engineering Chemistry, Vol.2, No.1, 30-37, March, 1991

Export Citation

철-수증기 반응에 의한 수소생성에 미치는 금속산화물의 첨가효과

Effect of Metal Oxide Additives on Hydrogen Production in the Steam-Iron Process

이대행, 문희, 박흥철

초록

금속산화물 CuO, In₂O₃, MoO₃, WO₃을 첨가시킨 환원철에 의한 수증기로부터 수소생성을 반응속도론적 관점에서 조사하였다. 첨가제는 수소생성에 대한 활성증진효과를 나타내었으며, 크기의 순서는 MoO₃ ＞＞ In₂O₃ ∼_＝ WO₃ ∼_＝ CuO 이었다. 속도해석에서 반응완료시간을 예측하기 위하여 수축 핵 모델 (Shrinking Core Model) 을 적용한 추산결과는 실험치와 대체로 잘 일치하였다. 상압 유동식 반응장치를 이용하여 600-750℃의 온도와 첨가제의 양 l wt %, Ar 유량 1 L/min, 수증기분압 0.085 atm에서 얻어진 겉보기 활성화에너지는 환원철 단독의 경우 27.9kJ/mol, 첨가제 MoO₃는 14.2, In₂O₃는 20.9, WO₃은 21.3, CuO는 22.4 kJ/mol을 각각 나타내었다.

The production of hydrogen from steam by reduced iron with additives such as CuO, In₂O₃, MoO₃ and WO₃ has been kinetically investigated. It was shown that all additives have a promoting effect on reaction activity in the order of MoO₃ ＞＞ In₂O₃ ∼_〓 WO₃ ∼_〓 CuO. The shrinking core model was applied to predict the complete conversion time and the results were quite comparable with experimental values. The reaction was carried out in a fixed flow reactor packed with reduced iron with 1 wt % of additives under the conditions, 600-750 ℃, Ar flow rate of 1 L/min and steam partial pressure of 0.085 atm. The apparent activation energies were 14.2, 20.9, 21.3, 22.4 and 27.9 kJ/mol with MoO₃, In₂O₃, WO₃, CuO and without additive, respectively.

[References]

Hydrogen, Its Technology and Implications, vol. IV, CRC Press (1979)
Lee BS, Tarman PB, "Status of the Steam Iron Program," 6th Synthetic Pipeline Gas Symposium (1974)
Nakaguchi S, J. Japan Petrol. Inst., 20, 69 (1977)
Murakami S, Miyamoto A, Kamitamai S, Kurahashi K, Kosaki Y, J. Jpn. Petrol. Inst., 25(6), 380 (1982)
Tarman PB, "Status of the Steam-Iron Process," 5th Synthetic Pipeline Gas Symposium (1973)
Park HC, Sakai Y, Kimura S, Tone S, Otake T, J. Chem. Eng. Jpn., 17(4), 395 (1984)
Tarman PB, "Status of the Steam-Iron Program," 8th Synthetic Pipeline Gas Symposium, 8, 129 (1976)
정현, 남기석, 이화형, 이현구, 서울공대연구보고, 16(2), 37 (1984)
Otsuka K, Hatano M, Morikawa A, J. Catal., 79, 493 (1983)
Yagi S, Kunii D, 5th International Symposium on Combution, p. 231, Reinhold, N.Y. (1955)
Park JY, Levenspiel O, Chem. Eng. Sci., 30, 1207 (1975)

[Referenced By]

[1] Hydrogen, Its Technology and Implications, vol. IV, CRC Press (1979)

[2] Lee BS, Tarman PB, "Status of the Steam Iron Program," 6th Synthetic Pipeline Gas Symposium (1974)

[3] Nakaguchi S, J. Japan Petrol. Inst., 20, 69 (1977)

[4] Murakami S, Miyamoto A, Kamitamai S, Kurahashi K, Kosaki Y, J. Jpn. Petrol. Inst., 25(6), 380 (1982)

[5] Tarman PB, "Status of the Steam-Iron Process," 5th Synthetic Pipeline Gas Symposium (1973)

[6] Park HC, Sakai Y, Kimura S, Tone S, Otake T, J. Chem. Eng. Jpn., 17(4), 395 (1984)

[7] Tarman PB, "Status of the Steam-Iron Program," 8th Synthetic Pipeline Gas Symposium, 8, 129 (1976)

[8] 정현, 남기석, 이화형, 이현구, 서울공대연구보고, 16(2), 37 (1984)

[9] Otsuka K, Hatano M, Morikawa A, J. Catal., 79, 493 (1983)

[10] Yagi S, Kunii D, 5th International Symposium on Combution, p. 231, Reinhold, N.Y. (1955)

[11] Park JY, Levenspiel O, Chem. Eng. Sci., 30, 1207 (1975)