THERMOCHEMICAL BEHAVIOUR OF ALGAL WASTE: KINETICS AND MECHANISMOF THE PYROLYSIS
Journal Title: Engineering and Technology Journal - Year 2018, Vol 3, Issue 1
Abstract
The present work assesses a possible process for treating algal wastes in an environmentally friendly way. It is based on the pyrolysis of these wastes for energetic valorization in order to evaluate its bioenergy potential. Thepyrolytic and kinetic characteristics of algal waste as a model for algal biomass were evaluated and compared at heating rates of 5, 10,20 and50°C min-1from 105 to900 °C in an inert atmosphere. The DTG curves showed three distinct stages of degradation; dehydration, devolatilization and residual decomposition. The kinetic analysis was established by the isoconversional methods of Friedman (FR), Flynn-Wall-Ozawa (FWO) and Vyazovkin (VYA) methods) to estimate activation energy, the master-plot methods were introduced to establish kinetic models. Activation energy values were shown to be 192.55, 183.26 and 185.45 kJ mol-1 as calculated by FR, FWO and VYA methods, respectively. The devolatilization stage of algal waste could be described by the Avramic-Erofeev equation (n = 3). It is shown that the isoconversional kinetic methods provide the reliable kinetic information suitable for adequately choosing the kinetic model which best describes the thermal decomposition of algal waste. The composite differential method was used to obtain the following kinetic triplet:
Authors and Affiliations
A. Aboulkas, A. Tabbal, H. Bouaik, M. El Achaby, K. El harfi, A. Barakat
Keywords
Related Articles
- EP ID EP705297
- DOI -
- Views 92
- Downloads 0
AVAILABILITY AND RELIABILITY INDICES: A PRACTICAL APPROACH FOR AFAM THERMAL PLANT ASSESSMENT AND IMPROVEMENT
Mechanical integrity and risk analysis for power stations are often based on few failure data. The risk issue is to reduce and forecast future failure and corrective actions taken to mitigate down time. The power station...
EFFECTIVE LEADERSHIP STYLE OF ENGINEERING MANAGERS IN THE GOVERNMENT CONSTRUCTION AGENCY: NATIONAL IRRIGATION ADMINISTRATION – UPRIIS DIVISION V
This research is designed to determine the most utilized and effective leadership style based on the actual practices, preferences of the employees in construction agency. Personnel from several sections (i.e. Maintenanc...
DEMODULATION OF INTERFEROGRAM WITH CLOSED FRINGES USING THE PHASE SHIFTING TECHNIQUE
This research exposes the foundations of optical metrology which occupies one of the most important in optics. A brief description is made of interferometry which in turn is part of the optical metrology. It demonstrate...
An Experimental Study on Hard Turning Performance of DIN 17350 Tool Steel
The main objective is to investigate the effects of cutting speed, feed rate and depth of cut on surface roughness Rz in hard turning process of DIN 17350-tool steel (60÷62HRC) under dry condition. The full factorial exp...
Evaluation of Infrastructure Construction Outcomes in the Implementation of Enhanced New Rural Areas in Phu Binh District, Thai Nguyen Province
Phu Binh is a midland district in the southern part of Thai Nguyen province, covering a total natural land area of 241.39 km². It is administratively divided into 20 commune-level units, including one town and 19 commune...