کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6475087 1424968 2017 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Oxidative pyrolysis of wood chips and of wood pellets in a downdraft continuous fixed bed reactor
ترجمه فارسی عنوان
ایزوتوپیزه کردن زغال چوب و گلوله های چوبی در یک رآکتور ثابت ثابت ثابت
کلمات کلیدی
ایزوفیلد تخت ثابت، زیست توده، تندرستی عملکرد محصولات،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
چکیده انگلیسی


- A counter-current oxidation zone was stabilized inside a downdraft reactor.
- Detailed mass balance including char, permanent gases and tar yields.
- The fed air flow rate and the fuel (wood) density were varied.
- Insights acquired on the shape and stability of the oxidation zone.

In air staged gasification and advanced carbonization processes, oxidative pyrolysis occurs in downdraft continuous fixed bed reactors. An oxidation zone separates the virgin fuel from the resulting char and propagates upward. Here, the oxidation zone was stabilized at a fixed elevation in a 20 cm I.D. fixed bed reactor using wood chips or wood pellets. In controlled continuous operating mode, we investigated the impact of air flux and bed bulk density on the behavior of the oxidation zone in terms of wood consumption, and yields of char, gas and tars. An air:wood mass ratio of 0.7 was measured and in our operating conditions, and was not sensitive to air mass flux and bed density. With oxidative pyrolysis, yields of organic condensates were lower than with allothermal pyrolysis, whereas the production of pyrolysis water and permanent gases increased. Finally, the oxidation zone was shown to be flat and horizontal in a wood pellet bed but inclined in a wood chip bed.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fuel - Volume 196, 15 May 2017, Pages 408-418
نویسندگان
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