A model for the formation of calcium carbide in solid pellets
A model for the formation of calcium carbide in solid pellets
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DOI：
10.1002/cjce.5450530512
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发表时间：
1975-10
影响因子：
2.1
通讯作者：
C. Brookes;C. Gall;R. Hudgins
中科院分区：
文献类型：
--
作者：
C. Brookes;C. Gall;R. Hudgins
在1650°C和1720°C之间，在50 mm Hg CO压力下，已经进行了关于由碳和石灰的3/1摩尔混合物的2.22-cm直径圆柱形丸粒形成固态碳化钙的实验。该反应被建模，假设穿过生长产物层的热传递控制反应前沿的移动速率，其中形成CaC 2的总反应被假设瞬时发生至分数转化率f。该模型依赖于产物层中CaC 2分解速率ko 2 e-ΔE/RgT和有效热导率k 0的知识。这些可以从独立的数据中估计，但需要根据特定的颗粒条件进行调整。与实测数据吻合较好，表明该模型可用于初步设计和优化研究。
Experiments have been conducted on the formation of calcium carbide in the solid state from 2.22-cm diameter cylindrical pellets of a 3/1 mole mixture of carbon and lime between 1650°C and 1720°C at 50 mm Hg CO pressure. The reaction was modelled assuming that heat transfer across a growing product layer controls the rate of movement of a reaction front where the overall reaction to form CaC2 is assumed to occur instantaneously to a fractional conversion f. The model depends upon a knowledge of the CaC2 decomposition rate in the product layer ko2e−ΔE/RgT and the effective thermal conductivity k0. These may be estimated from independent data but require adjustment for particular pellet conditions. Good agreement with the data shows that the model is adequate for preliminary design and optimization studies.