复合基质中乙炔缓释的扩散模型与工艺优化

化工学报 ›› 2010, Vol. 61 ›› Issue (5): 1307-1312.

复合基质中乙炔缓释的扩散模型与工艺优化

张丽杰,赵天涛,赵由才,石晓鸿

重庆理工大学化学与生物工程学院;同济大学污染控制与资源化研究国家重点实验室

出版日期:2010-05-05 发布日期:2010-05-05

Optimization and diffusion model for acetylene slow-release in compound matrix

ZHANG Lijie,ZHAO Tiantao,ZHAO Youcai,SHI Xiaohong

Online:2010-05-05 Published:2010-05-05

摘要/Abstract

摘要：

以甲烷生物抑制和长效缓释技术为基础，制备了石蜡/松香复合基质的甲烷缓释抑制剂。考察了乙炔和钙离子的释放情况，当碳化钙/石蜡比例为1∶1、缓释剂直径为10 mm时可获得较好的缓释效果，包裹醋酸纤维(CA)膜对缓释有明显的促进作用。当基质中添加松香含量达到20%时，缓释145 d的释放度仅为28.42%。Sinclair & Peppas经验扩散模型可以很好地预测乙炔的释放过程。基于复合基质扩散特性推演出了修正的Higuchi理论模型，并获得了有效扩散系数。

关键词:

缓释, 碳化钙, 甲烷抑制, 扩散模型

Abstract:

The slow-release inhibitors were prepared based on the technology of bio-inhibition on methanogens and slow-release.The process optimization on release of acetylene and Ca²⁺ was carried out, and it was found that when the ratio of calcium carbide to paraffin wax was 1∶1 and the diameter of slow-release inhibitor was 10 mm, the release time was longer.Additionally, the inhibitor coated with cellulose acetate (CA) had better effect on slow-release.The ratio of release reached 28.42% after releasing 145 d with the content of rosin 20%.Empirical diffusion formula of Sinclair & Peppas can describe the release process well.Moreover, a mechanism model was derived based on the Higuchi model and the diffusion coefficients were acquired.

Key words:

缓释, 碳化钙, 甲烷抑制, 扩散模型

张丽杰, 赵天涛, 赵由才, 石晓鸿. 复合基质中乙炔缓释的扩散模型与工艺优化 [J]. 化工学报, 2010, 61(5): 1307-1312.

ZHANG Lijie, ZHAO Tiantao, ZHAO Youcai, SHI Xiaohong. Optimization and diffusion model for acetylene slow-release in compound matrix[J]. CIESC Journal, 2010, 61(5): 1307-1312.