Fixed Bed Pyrolysis of Euphorbia Tirucalli Biomass for Bio-oil Production

نوع مقاله : مقاله پژوهشی

نویسندگان

1 Department of Biosystems Engineering, Shahrekord University, Shahrekord, Iran

2 Department of Biosystems Engineering, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran

3 Department of Environmental Sciences, Faculty of Fisheries and Environmental Sciences, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran

چکیده

Abstract
Pyrolysis is a thermochemical method for biomass conversion resulting from char, bio-oil and gas. Bio-oil can be used as a valuable renewable fuel or as a chemical in various industries. Char can also be used as a solid fuel, a cheap adsorbent, and raw materials for the production of bio-char derivatives and for agricultural applications. In the present study, the biomass pyrolysis of Euphorbia tirucalli was performed in a fixed bed reactor. Pyrolysis experiments for this study were to investigate the effect of temperature (450-530 °C) on the yield of pyrolysis products. Characteristics of pyrolysis products (bio-oil and bio-char) using instrumental chemistry methods such as field emission scanning electron microscopy (FE-SEM), energy-dispersive X-ray spectroscopy (EDX), thermal gravimetric analysis (TGA) and Gas chromatography–mass spectrometry (GC/MS) was investigated. The results showed that with increasing temperature, the yield of bio-oil and gas increases and the amount of bio-char decreases. The maximum yield of bio-oil (38%) was obtained at a temperature of 530 °C. Also, the maximum yield of various gases was about 39%. The highest thoracic effusion was observed at temperatures between 250-350 °C. The resulting acidic liquid is dark in color with a combination of chemical compounds including acids, alcohols, aldehydes, furfural, furan, phenols and some aromatic substances.

کلیدواژه‌ها


عنوان مقاله [English]

پیرولیز بستر ثابت گیاه ایفوربیا تیروکالی برای تولید نفت زیستی

نویسندگان [English]

  • Mehrshad Nazarpour 1
  • Ahmad Taghizadeh-Alisaraei 2
  • Mahya Khalaghi 3
1 Department of Biosystems Engineering, Shahrekord University, Shahrekord, Iran
2 Department of Biosystems Engineering, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran
3 Department of Environmental Sciences, Faculty of Fisheries and Environmental Sciences, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran
چکیده [English]

چکیده
پیرولیز یا آتشکافت یک روش ترموشیمیایی برای تبدیل زیست توده بوده و آن را به ذغال، نفت زیستی و گاز تبدیل می­کند. روغن زیستی می­تواند به عنوان یک سوخت تجدید­پذیر یا به عنوان ماده شیمیایی با ارزش در صنایع مختلف استفاده شود. همچنین می­توان از ذغال به عنوان سوخت جامد، جاذب ارزان قیمت و تولید مواد اولیه برای مصارف کشاورزی استفاده کرد. در مطالعه حاضر، پیرولیز زیست ­توده حاصل از گیاه ایفوربیا تیروکالی (Euphorbia tirucalli) در یک راکتور بستر ثابت انجام شد. آزمایش ­های پیرولیز برای این مطالعه، به منظور بررسی اثر دما (450 تا530 درجه سلسیوس) بر عملکرد محصولات تولیدی واکنش انجام شد. ویژگی­ های محصولات پیرولیز (نفت و کربن زیستی) با استفاده از روش­های مانند میکروسکوپ الکترونی روبشی انتشار میدانی (FE-SEM) ، طیف ­سنجی اشعه ایکس پراکندگی انرژی (EDX)، تجزیه و تحلیل وزن گرما (TGA) و کروماتوگرافی گازی طیف سنجی جرم (GC/MS) بررسی شد. نتایج نشان داد که با افزایش دما، عملکرد نفت زیستی و گاز افزایش می ­یابد و میزان کربن زیستی کاهش می ­یابد. بیشترین عملکرد نفت زیستی (38 درصد) در دمای 530 درجه سلسیوس بدست آمد. همچنین حداکثر عملکرد گازهای مختلف حدود 39 درصد بود. بالاترین کاهش وزنی در دمای بین 250 تا350 درجه سلسیوس مشاهده شد. مایع اسیدی حاصل، متشکل از ترکیبات شیمیایی از جمله اسیدها، الکل­ها، آلدئیدها، فورفورال، فوران، فنل­ها و برخی مواد معطر دارای رنگ تیره است.
 

کلیدواژه‌ها [English]

  • واژه ­های کلیدی: ایفوربیا تیروکالی
  • بیومس
  • پیرولیز
  • سوخت زیستی
  • نفت
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