کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5134806 1492955 2016 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Interactions of beech wood-polyethylene mixtures during co-pyrolysis
ترجمه فارسی عنوان
تعاملات مخلوط چوب و پلی اتیلن راش در طول همپرولیز
کلمات کلیدی
کمپیریلیس، چوب پیرولیز، پیرولیز پلاستیک، اثر هم افزایی، اثر متقابل،
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
چکیده انگلیسی


- Co-pyrolysis interactions of beech wood (BW) and polyethylene (PE) were studied.
- The BW/PE interactions mainly involve H-exchange to stabilize radical species.
- PE enhanced the levoglucosan and unsaturated methoxyphenol yields from BW.
- Products with higher carbon numbers were produced from PE in the presence of BW.

To investigate the interactions between beech wood (BW) and polyethylene (PE) during co-pyrolysis, they were pyrolyzed both individually and as their mixtures from ambient temperature to 650 °C at a heating rate of 10 °C min−1 using a thermogravimetric analyzer and a tube reactor. In the presence of PE, the production of levoglucosan (LG) and methoxyphenols with unsaturated alkyl side chains from BW was enhanced, resulting in maximum 1.65 and 1.55 times higher yields comparing with their expected yields from BW:PE (w:w) = 40:60 mixture, respectively. It was due to the stabilization of the radical species of those by H-abstraction from the PE pyrolysates in the vapor phase. According to this, CO, CO2, C2-C3 compounds, and 5-membered ring compounds, which are LG decomposition products, showed 0.86, 0.85, 0.58, and 0.68 times smaller yields comparing with their expected yields. Methoxyphenols with saturated alkyl side chains, phenols, and catechols, also showed 0.77, 0.66, and 0.87 times smaller yields because they are mainly derived from methoxyphenols with unsaturated alkyl side chains. On the other hand, it was suggested that hydrogen radicals produced during the polyaromatization of BW stabilized PE radical species, resulting in products from PE with higher carbon numbers. Thus, the present work reveals that the interactions between BW and PE mainly involve H-exchange to stabilize radical species. These findings increase our understanding of the operative mechanism in the co-pyrolysis of lignocellulosic biomass and synthetic polymers, which will be useful in future for achieving pyrolysis reaction control and recovering desirable products from difficult-to-separate initial mixtures.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Analytical and Applied Pyrolysis - Volume 122, November 2016, Pages 531-540
نویسندگان
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