scholarly journals STUDY ON THERMOGRAVIMETRIC AND KINETIC OF AGRICULTURAL RESIDUES IN VIETNAM

2017 ◽  
Vol 55 (4) ◽  
pp. 436
Author(s):  
Viet Quoc Dinh ◽  
Van Dinh Son Tho
Keyword(s):  
Thermal Degradation ◽  
Sugarcane Bagasse ◽  
Rice Husk ◽  
Fixed Bed ◽  
Inert Atmosphere ◽  
Thermochemical Conversion ◽  
Corn Cob ◽  
Ozawa Method ◽  
Thermo Gravimetric ◽  
Agricultural Residue

Thermochemical conversion of biomass has been studied extensively over the last decades. For the design, optimization and modeling of thermochemical conversion processes, such as fixed bed pyrolysis, a sound understanding of pyrolysis is essential. In this study, the thermal degradation of different agricultural residue species as rice husk (RH), corn cob (CC) and sugarcane bagasse (SGB) has been investigated using thermo-gravimetric. The kinetic parameters of three agricultural in the inert atmosphere are also calculated by Flynn-Wall-Ozawa method (FWO) and compared with acacia wood’s one. The average activated energy of rice husk lower than activated energy of acacia wood. The average activated energy of corn cob and sugarcane bagasse are higher than the activated energy of acacia wood thermal degradation. This result has important role in the reactor design for using agricultural residue to generate power such as pyrolysis or gasification.

Thermogravimetric devolatisation behavior of agricultural residue for generation of syngas

2021 ◽  
pp. 1-17
Author(s):  
Praveen Kumar ◽  
P.M.V. Subbarao ◽  
L.D. Kala ◽  
V.K. Vijay
Keyword(s):  
Activation Energy ◽  
Pearl Millet ◽  
Proximate Analysis ◽  
Thermochemical Conversion ◽  
Degradation Behavior ◽  
Ozawa Method ◽  
Thermogravimetric Method ◽  
Agricultural Residue ◽  
Tg Analysis ◽  
Tg And Dtg

Abstract The thermal degradation characteristics of eucalyptus, pearl millet cob, and corncob were investigated using non-isothermal thermogravimetric method. This investigation was performed with the objective of carrying out thermochemical conversion for obtaining syngas. TG and DTG analysis were carried out to understand thermal devolatisation behavior and estimation of various thermophysical properties of the biomasses. The degradation behavior was analysed in the light of lignocellulosic composition that was found to have definitive influence on degradation outcomes. TG analysis has been utilized to obtain proximate analysis of biomass. Activation energy using Flynn-Wall-Ozawa method have been estimated and found to be 201, 150 and 68 kJ mol−1 for eucalyptus, pearl millet cob, and corncob respectively. The TG analysis and activation energy together indicated that corncob is easiest for thermochemical conversion amongst the three biomasses. The TG curve also confirms the same.

scholarly journals Adsorption properties of sugarcane bagasse and corn cob for the sulfamethoxazole removal in a fixed-bed column

2021 ◽  
Vol 31 (1) ◽  
Author(s):  
Diego Juela ◽  
Mayra Vera ◽  
Christian Cruzat ◽  
Ximena Alvarez ◽  
Eulalia Vanegas
Keyword(s):  
Adsorption Capacity ◽  
Sugarcane Bagasse ◽  
Fixed Bed ◽  
Good Alternative ◽  
Point Of Zero Charge ◽  
Diffusion Resistance ◽  
Corn Cob ◽  
Dispersed Particles ◽  
Natural Adsorbents ◽  
Boehm Titration

AbstractNatural adsorbents are a good alternative to remove antibiotic residues from wastewater. In this study, the adsorption capacity of sulfamethoxazole (SMX) onto sugarcane bagasse (SB) and corn cob (CC) in a continuous fixed-bed was compared. Brunauer Emmett Teller, Fourier transform infrared (FTIR), Boehm titration, and point of zero charge (pHpzc) were used to characterize both adsorbents. The adsorption capacity (qe) and the removal percentage of SMX (% R) were investigated at different different flow rates (2, 5, and 7 mL min− 1) and adsorbent masses (4 and 6.4 g), and a constant initial concentration of 5 mg L− 1. The results of the characterization showed that SB has a morphology with more dispersed particles and a specific surface higher than CC (2.6 > 1.2 m2 g− 1). Boehm titration indicates that both the surface of SB and CC have a greater amount of acid groups, which is in agreement with FTIR and pHpzc results. The continuous fixed-bed experiments showed that % R and qe of SMX are higher with SB in all the tests. The highest qe and maximum % R was 0.24 mg g− 1 and 74% with SB, and 0.15 mg g− 1 and 65% using CC. In most cases, the qe of both adsorbents decreased with the increase of flow rate and bed height. An analysis suggests that hydrogen bonds could be the main factor favoring the SMX adsorption with SB. Finally, the intraparticle diffusion was the rate-controlling step, predominating the pore-volume diffusion resistance.

Chemical Kinetics Modeling on Bio-Oil Production from Pyrolysis of Sugarcane Bagasse

2021 ◽  
Vol 1034 ◽  
pp. 199-205
Author(s):  
Dewi Selvia Fardhyanti ◽  
Megawati ◽  
Haniif Prasetiawan ◽  
Noniek Nabuasa ◽  
Mohammad Arik Ardianta
Keyword(s):  
Sugarcane Bagasse ◽  
Alternative Energy ◽  
Fixed Bed ◽  
Raw Material ◽  
Fixed Bed Reactor ◽  
Thermochemical Conversion ◽  
Pyrolysis Process ◽  
Product Analysis ◽  
Biomass Waste ◽  
Bio Oil

Biomass is a source of alternative energy that is environmentally friendly and very promising as one of the sources of renewable energy at present. The best candidate for the biomass waste for pyrolysis raw material is sugarcane bagasse. The sugarcane bagasse is a fibrous residue that is produced after crushing sugarcane for its extraction. Sugarcane bagasse is very potential to produce bio-oil through a pyrolysis process. The advantage of utilizing sugarcane bagasse is to reduce the amount of waste volume. Pyrolysis is a simple thermochemical conversion that transforms biomass with the near absence of absence of oxygen to produce fuel. Experiments were carried out on the fixed bed reactor. The analysis was carried out over a temperature range of 300-500 °C under atmospheric conditions. Products that are usually obtained from the pyrolysis process are bio-oil, char, and gas. Product analysis was performed using Gas Chromatography (GC) and Mass Spectrometry (MS) analysis. This research is aimed to study the kinetics of the sugarcane bagasse pyrolysis process to produce bio-oil. Three different models were proposed for the kinetic study and it was found that model III gave the best prediction on the calculation of pyrolysis process. From the calculation results, kinetic parameters which include activation energy (Ea) and the k factor (A) at a temperature of 300 °C is 2.4730 kJ/mol and 0.000335 s-1, at a temperature of 400 °C is 3, 2718 kJ/mol and 0.000563 s-1, and at a temperature of 500 °C is 4.8942 kJ/mol and 0.0009 s-1.

Thermogravimetric Analysis and Characterisation of Yard Waste as a Feedstock to Gasification Process

2013 ◽  
Author(s):  
Anjireddy Bhavanam ◽  
R. C. Sastry
Keyword(s):  
Thermo Gravimetric Analysis ◽  
Thermal Conversion ◽  
Inert Atmosphere ◽  
Thermochemical Conversion ◽  
Gravimetric Analysis ◽  
Heating Rates ◽  
Thermo Gravimetric ◽  
Yard Waste ◽  
Gasification Process ◽  
Institute Of Technology

Gasification has great potential to make use of the biomass and wastes as a source for energy among various thermochemical conversion processes. The aim of this work is to study the suitability of yard waste for energy conversion using gasification process by Thermo gravimetric analysis. Yard waste (consisting of leaves, twigs and grass clippings) is collected from the National Institute of Technology Warangal. It is then dried and ground to a particle size of less than 250μm for thermo gravimetric study. Before going to thermo gravimetric analysis; the sample is analyzed to measure the main properties that affect thermal conversion. Moisture content present in the sample is determined by the oven drying method. Proximate is done according to standard ASTM test methods and ultimate analysis is conducted using elemental analyzer. Finally thermo gravimetric analyses is performed at various heating rates of 10, 30, and 50°Cmin−1 in nitrogen (inert) and air (oxidizing) atmospheres. The weight losses of yard waste in inert atmosphere occur in three stages and in air it occurs in four stages.

Biomass co-pyrolysis: Effects of blending three different biomasses on oil yield and quality

2019 ◽  
Vol 37 (9) ◽  
pp. 925-933 ◽  
Author(s):  
Derya Yeşim Hopa ◽  
Oğuzhan Alagöz ◽  
Nazan Yılmaz ◽  
Meltem Dilek ◽  
Gamze Arabacı ◽  
...  
Keyword(s):  
Sugarcane Bagasse ◽  
Rice Husk ◽  
Fixed Bed ◽  
High Fatty Acid ◽  
Calorific Value ◽  
Volatile Matter ◽  
Fixed Bed Reactor ◽  
Oil Yield ◽  
Gas Chromatography Mass Spectrometry ◽  
Bio Oil

In the present study, pyrolysis and co-pyrolysis of sugarcane bagasse, poppy capsule pulp, and rice husk were conducted in a fixed bed reactor at 550⁰C in nitrogen atmosphere. The moisture (5%–8%), ash (4%–17%), volatile matter (60%–76%), and fixed carbon analyses (11%–24%) of the utilized biomass were conducted. The decomposition behavior of biomasses due to the heat effect was investigated by thermogravimetric analysis/differential thermal analysis . In the pyrolysis of biomasses separately, the highest bio-oil yield was obtained with sugarcane bagasse (27.4%). In the co-pyrolysis of the binary blends of biomass, the highest bio-oil yield was obtained with the rice husk and sugarcane bagasse blends. While the mean bio-oil yield obtained with the separate pyrolysis of these two biomasses was 23.9%, it was observed that the bio-oil yield obtained with the co-pyrolysis of biomass blends was 28.4%. This suggested a synergistic interaction between the two biomasses during pyrolysis. It was observed that as the total ash content in the biomasses used in the pyrolysis increased, the bio-oil yield decreased, and the solid product content increased. Characterization studies of bio-oils were conducted by Fourier-transform infrared spectroscopy, gas chromatography–mass spectrometry (GC-MS), and hydrogen-1 nuclear magnetic resonance analyses. Results of these studies revealed that, all bio-oils were mainly composed of aliphatic and oxygenated compounds. The calorific values of bio-oils were determined by calorimeter bomb. Based on the GC-MS, the bio-oils with high fatty acid and its ester content also had high calorific values. The highest calorific value was 29.68 MJ kg-1, and this was obtained by pyrolysis of poppy capsule and sugarcane bagasse blend.

scholarly journals Elucidating The Thermal Decomposition Mechanism and Pyrolysis Characteristics of Biorefinery-Derived Humins From Sugarcane Bagasse And Rice Husk

2021 ◽  
Author(s):  
Julio César de Jesus Gariboti ◽  
Marina Gontijo Souza Macedo ◽  
Vinícius Matheus Silva Macedo ◽  
Yesid Javier Rueda-Ordóñez ◽  
Emília Savioli Lopes ◽  
...  
Keyword(s):  
Activation Energy ◽  
Sugarcane Bagasse ◽  
Rice Husk ◽  
Isoconversional Method ◽  
Reaction Model ◽  
Thermochemical Conversion ◽  
Thermal Decomposition Mechanism ◽  
Pyrolysis Kinetics ◽  
Pyrolysis Mechanism ◽  
Pyrolysis Characteristics

Abstract Biomass-derived humins produced in the biorefining of biomass represent an attractive feedstock for thermochemical processes and other carbon-derived platform chemicals. However, in most works, humins are merely a by-product that is not further analyzed. This work presents the purification and characterization of humins derived from sugarcane bagasse and rice husks (H-SCB and H-RH respectively), followed by the kinetic and thermodynamic analysis of its pyrolysis. Pyrolysis was examined via thermogravimetric analysis (TGA), and a global reaction model was adopted to address pyrolysis kinetics. To understand the pyrolysis process of humins and boost the quality of fit between the kinetic model and thermoanalytical data, the analyses were based on the Vyazovkin isoconversional method. The activation energy of H-SCB increased from 166.09 to 329.76 kJ mol-1. In contrast, the activation energy of H-RH decreased from 163.31 to 84.99 kJ mol-1. According to the results of the generalized master plot approach, the governing reaction mechanism shifted among order-based models, nucleation, and diffusion-controlled particle mechanisms. Derived thermodynamic properties showed that the heat absorbed helps the humins to achieve a more ordered state close to a conversion of 0.50. As far as we know, these findings are the first reported data on the forecast kinetic curves and pyrolysis mechanism of biorefinery-derived humins from sugarcane bagasse and rice husk, and these results will enable process design for the thermochemical conversion of these emerging materials to produce energy and other products.

scholarly journals Gasification and Power Generation Characteristics of Rice Husk, Sawdust, and Coconut Shell Using a Fixed-Bed Downdraft Gasifier

2021 ◽  
Vol 13 (4) ◽  
pp. 2027
Author(s):  
Md. Emdadul Hoque ◽  
Fazlur Rashid ◽  
Muhammad Aziz
Keyword(s):  
Rice Husk ◽  
Fixed Bed ◽  
Cost Effective ◽  
Coconut Shell ◽  
Energy Sources ◽  
Airflow Rate ◽  
Gas Generation ◽  
Biomass Feedstocks ◽  
Downdraft Gasifier ◽  
Synthetic Gas

Synthetic gas generated from the gasification of biomass feedstocks is one of the clean and sustainable energy sources. In this work, a fixed-bed downdraft gasifier was used to perform the gasification on a lab-scale of rice husk, sawdust, and coconut shell. The aim of this work is to find and compare the synthetic gas generation characteristics and prospects of sawdust and coconut shell with rice husk. A temperature range of 650–900 °C was used to conduct gasification of these three biomass feedstocks. The feed rate of rice husk, sawdust, and coconut shell was 3–5 kg/h, while the airflow rate was 2–3 m3/h. Experimental results show that the highest generated quantity of methane (vol.%) in synthetic gas was achieved by using coconut shell than sawdust and rice husk. It also shows that hydrogen production was higher in the gasification of coconut shell than sawdust and rice husk. In addition, emission generations in coconut shell gasification are lower than rice husk although emissions of rice husk gasification are even lower than fossil fuel. Rice husk, sawdust, and coconut shell are cost-effective biomass sources in Bangladesh. Therefore, the outcomes of this paper can be used to provide clean and economic energy sources for the near future.

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