Physicochemical Modeling for Pressurized Hot Water Extraction of Spruce Wood,Industrial & Engineering Chemistry Research

当前位置： X-MOL 学术 › Ind. Eng. Chem. Res. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Physicochemical Modeling for Pressurized Hot Water Extraction of Spruce Wood
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2018-11-29 , DOI: 10.1021/acs.iecr.8b05097
Waqar Ahmad ₁ , Susanna Kuitunen ₂ , Andrey Pranovich ₃ , Ville Alopaeus ₁

Affiliation

The study of reaction kinetics and process modeling plays a vital role in the development and optimization of industrial processes. In this study, a physicochemical model is presented for pressurized hot water extraction of spruce wood meal to facilitate process development and optimization. The model takes into account several relevant phenomena during the extraction process, including acid–base reaction equilibrium, irreversible reaction kinetics, ion exchange, and mass transfer. The system is modeled by assuming two liquid phases, i.e., liquid external to wood fibers and fiber-bound liquid to enable inclusion of ion exchange. The nonideal behavior of the system (due to presence of ions) is considered by utilizing activities instead of concentrations. The scission of hemicellulose polymers into oligomers and monomers is modeled by a population balance approach of discretized categories. Model parameters are optimized by fitting the model output to experimental data reported in the literature. The presented model aims to be the most comprehensive description of the phenomena taking place during the hot water extraction of softwood to date. Such physicochemical models are able to provide better understanding for parts of the process, which cannot be followed directly due to the tediousness of analytical methods. It also reveals gaps in the present knowledge and provides a step toward further development.

中文翻译：

云杉木材加压热水萃取的理化模拟

反应动力学和过程建模的研究在工业过程的开发和优化中起着至关重要的作用。在这项研究中，提出了一种物理化学模型，用于云杉木粉的加压热水萃取，以促进工艺开发和优化。该模型考虑了萃取过程中的几种相关现象，包括酸碱反应平衡，不可逆反应动力学，离子交换和传质。通过假设两个液相，即木纤维外部的液体和结合离子交换的纤维结合液体，对系统进行建模。通过利用活性而不是浓度来考虑系统的非理想行为（由于离子的存在）。半纤维素聚合物分裂成低聚物和单体是通过离散类别的种群平衡方法来模拟的。通过将模型输出与文献中报道的实验数据进行拟合，可以优化模型参数。提出的模型旨在最全面地描述迄今为止软木热水提取过程中发生的现象。这样的物理化学模型能够更好地理解过程的各个部分，由于分析方法繁琐而无法直接遵循。它还揭示了当前知识的差距，并为进一步发展提供了一步。提出的模型旨在最全面地描述迄今为止软木热水提取过程中发生的现象。这样的物理化学模型能够更好地理解过程的各个部分，由于分析方法繁琐而无法直接遵循。它还揭示了当前知识的差距，并为进一步发展提供了一步。提出的模型旨在最全面地描述迄今为止软木热水提取过程中发生的现象。这样的物理化学模型能够更好地理解过程的各个部分，由于分析方法繁琐而无法直接遵循。它还揭示了当前知识的差距，并为进一步发展提供了一步。

更新日期：2018-11-30

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11