摘要
从反应温度、压力和进料量(CH_4、CO_2、H_2O和O_2)等6个变量中固定任意5个,优化剩下的一个变量的方案,研究甲烷部分氧化合成燃气含水蒸气、二氧化碳重整的能量耦合工艺(即平衡时体系的热效应为零)。建立为能量耦合的双层优化模型,即内层通过求解吉布斯自由能的最低限度得到平衡组成;外层通过改变进料组成实现体系的能量耦合。结果表明:0．1 MPa下反应体系的最佳操作温度范围为1 050～1 150 K;固定其他条件,总可通过优化O_2的量使反应体系实现能量耦合,且平衡时加入的O_2可以反应完全;平衡组分中H_2/CO比值主要取决于进料中H_2O/CO_2比值,与O_2量关系不大;另外还得出了能量耦合时变量间的关系和消炭条件。石英管反应器的热中性温度下的实验结果与本文计算结果基本一致。
Energy coupling technology （heat effect of system is zero at equilibrium） during the reaction of partial oxidation of methane to synthesis gas, contained steam-carbon dioxide reforming, was investigated by optimizing one through fixing five variables at will of reaction temperature, pressure and feed quantity（CH4, CO2, H2O and O2 ）. A two-tier optimization model for energy coupling was built. On the inner level, equilibrium composition was obtained by solving minimization of Gibbs free energy, and on the outer level energy coupling could be achieved by changing feed quantity. The results indicated that the optimum operating temperature was 1 050 K - 1 150 K at 0.1 MPa. Energy coupling could always be achieved by optimizing O2 content in the feed through fixing the others, it also found that feed O2 could react completely at equilibrium. The H2/CO ratio of equilibrium composition was mainly determined by the H2O/CO2 ratio of feed composition, but it had little relation to oxygen content. Furthermore, the relationship among variables and carbon elimination conditions were also obtained when achieving energy coupling. The experimental result of thermal neutrality in quartz tube reactor was similar to this paper.
出处
《计算机与应用化学》
CAS
CSCD
北大核心
2007年第3期309-313,共5页
Computers and Applied Chemistry
基金
国家自然科学基金项目(20376078)
关键词
甲烷部分氧化
合成气
能量耦合工艺
吉布斯自由能的最低限度
methane partial oxidation, synthesis gas, energy coupling technology, minimization of Gibbs free energy
作者简介
李国栋（1981-），男，硕士研究生，E-mail：lgd0623@126．com．
胡仰栋（联系人）．
