کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5134724 1492956 2016 17 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Coupled reactor and particle model of biomass drying and pyrolysis in a bubbling fluidized bed reactor
ترجمه فارسی عنوان
مدل راکتور همراه و ذره ای از خشک شدن زیست توده و پیرولیز در یک رآکتور بارگذاری سیال
کلمات کلیدی
ذرات بیوماس، انرژی تجدید پذیر، پیرولیز، مدل سازی جنبشی، رآکتور رطوبتی مایع جوشکاری،
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
چکیده انگلیسی


- A coupled particle and reactor model of biomass drying and pyrolysis is developed.
- Two different kinetic mechanisms are compared for the primary pyrolysis of biomass.
- Biomass pyrolysis products distribution are obtained from CHO elemental balances.
- Model predictions are in good agreement with literature experimental data.

A comprehensive single particle model of biomass drying and pyrolysis is coupled with an ideal reactor model of a bubbling fluidized bed with nitrogen as the fluidizing gas. To predict biomass pyrolysis products yield and composition under steady-state operation, a two-step biomass pyrolysis kinetic mechanism is adopted with primary pyrolysis described by two different reaction kinetic schemes: (a) Three parallel first-order reactions producing primary pyrolysis products (non-condensable gas, tar/bio-oil and char), and (b) a detailed solid state kinetics mechanism based on multiple reactions of lignin, cellulose, and hemicellulose contents of two specific types of biomass (poplar and lodgepole pine). Secondary pyrolysis is modeled by two parallel reactions describing homogeneous thermal cracking of tar to non-condensable gas and char. In addition to the yields of pyrolysis products often modeled as lumped species, this model addresses an existing gap of knowledge in predicting the proportions of major compounds in the pyrolysis gas based on a few simplifying assumptions and CHO elemental balances. This predictive model is a useful tool to relate biomass pyrolysis products yield and composition to process operating parameters such as biomass ultimate analysis, reactor temperature, gas residence time, mean solids residence time inside the reactor, as well as biomass particle size and moisture content. Model predictions for the two kinetic schemes are in good agreement with available experimental data from the literature.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Analytical and Applied Pyrolysis - Volume 121, September 2016, Pages 213-229
نویسندگان
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