کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4920897 1429212 2017 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Pyrolysis kinetics and multi-objective inverse modelling of cellulose at the microscale
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
پیش نمایش صفحه اول مقاله
Pyrolysis kinetics and multi-objective inverse modelling of cellulose at the microscale
چکیده انگلیسی

The chemistry of pyrolysis, together with heat transfer, drives ignition and flame spread of biomass materials under many fire conditions, but it is poorly understood. Cellulose is the main component of biomass and is often taken as a surrogate for biomass. Its chemistry of pyrolysis is simpler and dominates the pyrolysis of biomass. Many reaction schemes with corresponding kinetic parameters can be found in the literature for the pyrolysis of cellulose, but their appropriateness for fire is unknown. This study investigated inverse modelling and blind predictions of six reaction schemes of different complexities for isothermal and non-isothermal thermogravimetric experiments. We used multi-objective optimisation to simultaneously and separately inverse model the kinetic parameters of each reaction scheme to several experiments. Afterwards we tested these parameters with blind predictions. For the first time, we reveal a set of equally viable solutions for the modelling of pyrolysis chemistry of different experiments. This set of solutions is called a Pareto front, and represents a trade-off between predictions of different experiments. It stems from the uncertainty in the experiments and in the modelling. Parameters derived from non-isothermal experiments compared well with the literature, and performed well in blind predictions of both isothermal and non-isothermal experiments. Complexity beyond the Broido-Shafizadeh scheme with seven parameters proved to be unnecessary to predict the mass loss of cellulose; hence, simple reaction schemes are most appropriate for macroscale fire models. Modellers should, therefore, use simple reaction schemes to model pyrolysis in macroscale fire models.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fire Safety Journal - Volume 91, July 2017, Pages 191-199
نویسندگان
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