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The hydrodeoxygenation of 2-methoxy phenol and dibenzofuran, which are representative model compounds of bio-oil, was performed using two different Pt/mesoporous zeolite catalysts, Pt/mesoporous Y and Pt/mesoporous MFI. The reforming of 2-methoxy phenol and dibenzofuran via catalytic hydrodeoxygenation was investigated using a batch reactor at 40 bar and 250 °C. The characteristics of the catalysts...
Three microporous zeolites with different structures, HZSM-5 (Si/Al2 = 23), Hβ (Si/Al2 = 25) and HY (Si/Al2 = 30), were assessed for the first time for the catalytic fast pyrolysis of Geodae-Uksae-1, a variety of Miscanthus sacchariflorus. In non-catalytic pyrolysis, the temperature for the maximum bio-oil yield was 500 °C, which allowed sufficient conversion of the solid to the vapor phase and suppressed...
The present work describes the first stage of a multi-stage process seeking to develop a usable and cheap design for a downdraft gasifier fed with lingo-cellulosic olive waste. The thermochemical behaviour of two types of olive waste has been assessed during pyrolysis and torrefaction experiments. Olive tree trimmings and olive pulp were pyrolysed in a quartz reactor at peak temperatures between 400 °C...
The influence of heating rate and pyrolysis temperature on the pyrolysis of Jimsar oil shale was studied. Oil shale samples were pyrolyzed in a TG analyzer (thermogravimetric analyzer) at eight different heating rates (0.5–30 °C/min) up to a temperature of 1000 °C. The decomposition mechanism of oil shale was confirmed through online MS (mass spectrometric) combined with the TGA. Compounds of about...
A constructed wetland plant waste, Arundo donax L. (AD), was pyrolyzed from room temperature to 1000 °C under a dynamic high-purity nitrogen atmosphere at different heating rates. Results show that three stages occur during thermal degradation of AD. Mass loss rates associated with lignocellulose degradation were not affected by heating rates. Physical and chemical characterization of ADs pyrolyzed...
The effects of heating manner and charring temperature on both the physical and chemical properties of coal were investigated by petrographic techniques. Six coal samples of different rank were subjected to chemical treatment plus heat treatment. The pyrolysis experiments were carried out on acid washed coal in order to avoid ash formation. The chars used in the study were prepared in a tube furnace...
To produce a bio-oil having a high concentration of furfural, corn stover was fast-pyrolyzed using ZnCl2 in a fluidized bed reactor at 330–430 °C. The effects of various parameters such as reaction temperature, water- and acid-washing prior to pyrolysis, and ZnCl2 content on the product and furfural yields were investigated. Moreover, solvent extraction was conducted using toluene at different mass...
This study examines pyrolysis-based electricity generation and ethanol production using various crops and agricultural residuals in Taiwan. It analyzes the net economic and environmental effects within the framework of the Extended Taiwanese Agricultural Sector Model by incorporating ongoing and potential gasoline, coal and GHG (greenhouse gas) prices. The study discusses the effects of agricultural...
The aim of this work was to assess the energy potential of food waste energy harvesting system (digestion followed by pyrolysis of digestate). Digestate (DFW) with increased calorific content was produced after a commercial one stage anaerobic digestion of the raw food waste (RFW). Separate pyrolysis of RFW and DFW (digestated food waste) distributed 15.7 MJ/kg and 17.2 MJ/kg respectively, among the...
Renewable diesel productions through HTL (hydrothermal liquefaction) and pyrolysis of Chlamydomonas reinhardtii were compared based on energetic and economic evaluation. The whole biofuel production pathway was simulated, from the microalgae cultivation step to the upgrading of the bio-oil. Alternative dewatering technologies were evaluated to decrease the energy consumption and the bio-diesel cost...
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