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沈阳工业大学化工装备学院,辽宁 辽阳 111000
Received:10 February 2026,
Revised:2026-06-04,
Accepted:09 June 2026,
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YU Honglei, LIANG Hui, FANG Xin, et al. Mass transfer characteristics of an atomizing reactor in the preparation of magnesium hydroxide[J/OL]. CIESC Journal, 2026.
YU Honglei, LIANG Hui, FANG Xin, et al. Mass transfer characteristics of an atomizing reactor in the preparation of magnesium hydroxide[J/OL]. CIESC Journal, 2026. DOI: 10.11949/0438-1157.20260207.
通过理论模型与实验验证相结合,探讨了雾化反应器制备氢氧化镁的传质性能。基于表面更新理论建立了传质模型,预测精度较好(误差
<
10%)。实验结果表明,液气流量比和溶液浓度显著影响传质效率,最佳条件为液体流量60 L/h,氨气流量300 L/h(液气流量比2×10⁻³)、氯化镁溶液浓度25 wt%、温度308 K,此时传质系数(
K
LA
)达到最大值2.53 kmol·kPa
-1
·m
-3
·s
-1
。雾化反应器在30 min内转化率达77.61%,较鼓泡反应器提升8.2%。反应时间缩短40 min,产物氢氧化镁粒径更小(D
50
降低74.12%)、分布更窄,晶体结构稳定。延长雾化时间至90分钟可获得规则六角片状氢氧化镁,提高分散性。本研究可为相关工艺优化提供基础理论与数据参考。
The mass transfer performance of an atomizing reactor for magnesium hydroxide preparation was investigated through a combination of theoretical modeling and experimental validation. A mass transfer model based on surface renewal theory was developed and exhibited good predictive capability
with an error below 10%. The results demonstrated that the liquid–gas flow ratio and magnesium chloride solution concentration significantly influenced the mass transfer efficiency. Optimal conditions were obtained at a liquid flow rate of 60 L h⁻¹
an ammonia flow rate of 300 L h⁻¹ (liquid–gas flow ratio of 2 × 10⁻³)
a MgCl₂ solution concentration of 25 wt%
and a temperature of 308 K. Under these conditions
the volumetric mass
transfer coefficient (
K
LA
) reached a maximum value of 2.53 kmol·kPa⁻¹·m⁻³·s⁻¹. The atomizing reactor achieved a conversion of 77.61% within 30 min
representing an 8.2% increase compared with a conventional bubble reactor
while reducing the reaction time by 40 min. Moreover
the obtained Mg(OH)₂ exhibited a significantly smaller particle size (D
50
reduced by 74.12%)
narrower size distribution
and stable crystal structure. Extending the atomization time to 90 min resulted in well-defined hexagonal plate-like Mg(OH)₂ with improved dispersion. This research can provide fundamental theories and data references for the optimization of related processes.
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