工业催化
工業催化
공업최화
INDUSTRIAL CATALYSIS
2015年
6期
486-490
,共5页
化学热力学%碳四烯烃%丙烯%乙烯%催化裂解
化學熱力學%碳四烯烴%丙烯%乙烯%催化裂解
화학열역학%탄사희경%병희%을희%최화렬해
chemical thermodynamics%C4 olefins%propylene%ethylene%catalytic cracking
以 C2~ C4烯烃作为碳四烯烃催化裂解制乙烯和丙烯反应系统模型，借助吉布斯自由能最小原理对碳四烯烃裂解过程进行热力学计算。结果表明，随着温度升高，乙烯平衡收率升高，610℃时，丙烯平衡收率达44.8%。在丁烯裂解过程中，随着压力降低，乙烯平衡收率升高，压力低于0.1 MPa 时，随着压力降低，乙烯平衡收率升高速率加快，由0.1 MPa 时的21.8%升至0.01 MPa时的46.5%。压力在（0.05~0.8）MPa 时，随着压力降低，丙烯平衡收率缓慢升高，0.05 MPa时达45%，之后迅速下降。热力学计算结果与实验结果比较显示，实验温度范围，1-丁烯在 ZSM -5分子筛催化剂上催化裂解过程中乙烯和丙烯的收率以及丁烯转化率随温度的变化趋势同热力学计算结果一致。从提高丙烯收率的角度，建议温度（500~580）℃，压力0.05 MPa。
以 C2~ C4烯烴作為碳四烯烴催化裂解製乙烯和丙烯反應繫統模型，藉助吉佈斯自由能最小原理對碳四烯烴裂解過程進行熱力學計算。結果錶明，隨著溫度升高，乙烯平衡收率升高，610℃時，丙烯平衡收率達44.8%。在丁烯裂解過程中，隨著壓力降低，乙烯平衡收率升高，壓力低于0.1 MPa 時，隨著壓力降低，乙烯平衡收率升高速率加快，由0.1 MPa 時的21.8%升至0.01 MPa時的46.5%。壓力在（0.05~0.8）MPa 時，隨著壓力降低，丙烯平衡收率緩慢升高，0.05 MPa時達45%，之後迅速下降。熱力學計算結果與實驗結果比較顯示，實驗溫度範圍，1-丁烯在 ZSM -5分子篩催化劑上催化裂解過程中乙烯和丙烯的收率以及丁烯轉化率隨溫度的變化趨勢同熱力學計算結果一緻。從提高丙烯收率的角度，建議溫度（500~580）℃，壓力0.05 MPa。
이 C2~ C4희경작위탄사희경최화렬해제을희화병희반응계통모형，차조길포사자유능최소원리대탄사희경렬해과정진행열역학계산。결과표명，수착온도승고，을희평형수솔승고，610℃시，병희평형수솔체44.8%。재정희렬해과정중，수착압력강저，을희평형수솔승고，압력저우0.1 MPa 시，수착압력강저，을희평형수솔승고속솔가쾌，유0.1 MPa 시적21.8%승지0.01 MPa시적46.5%。압력재（0.05~0.8）MPa 시，수착압력강저，병희평형수솔완만승고，0.05 MPa시체45%，지후신속하강。열역학계산결과여실험결과비교현시，실험온도범위，1-정희재 ZSM -5분자사최화제상최화렬해과정중을희화병희적수솔이급정희전화솔수온도적변화추세동열역학계산결과일치。종제고병희수솔적각도，건의온도（500~580）℃，압력0.05 MPa。
Using C2 - C4 olefins as reaction model of production of propylene and ethylene from catalytic cracking of C4 olefins,the thermodynamics performance for C4 olefins cracking was calculated based on the principle of minimum gibbs free energy. The results showed that equilibrium yield of ethylene increased with the increase of temperature,and equilibrium yield of propylene reached 44. 8% at 610 ℃. On the other hand,equilibrium yield of ethylene enhanced with the decrease of pressure at 580 ℃ , especially while pressure was below 0. 1 MPa,the equilibrium yield of ethylene had a rapid increase from 21. 8% at 0. 1 MPa to 46. 5% at 0. 01 MPa;equilibrium yield of propylene increased slightly with the decrease of pressure at the range of(0. 05 - 0. 8)MPa,and reached 45% at 0. 05 MPa and subsequently decreased rapidly. The comparison of thermodynamics equilibrium data and experiment test results showed that the yield of ethylene and propylene and butene conversion from thermodynamics calculation data were in accord with experiment results based on production of propylene and ethylene from butane catalytic cracking over ZSM-5 molecular sieve catalyst. In order to obtain optimum propylene yield,the appropriate reaction condition suggested at reaction temperature range of(500 - 580)℃ and pressure 0. 05 MPa.
