scholarly journals Study on the Product Characteristics of Pyrolysis Lignin with Calcium Salt Additives

Materials ◽  
2019 ◽  
Vol 12 (10) ◽  
pp. 1609 ◽  
Author(s):  
Yong Cui ◽  
Wenliang Wang ◽  
Jianmin Chang
Keyword(s):  
Calcium Salt ◽  
Fixed Bed ◽  
Value Added ◽  
Positive Influence ◽  
Fixed Bed Reactor ◽  
Bet Surface Area ◽  
Gas Chromatography Mass Spectrometry ◽  
Product Characteristics ◽  
Calcium Salts ◽  
Bio Oil

This study investigated and compared the product characteristics of pyrolysis lignin under different catalytic effects resulting from various calcium salts. The pyrolysis of lignin was conducted in a fixed-bed reactor with calcium salt additives, which included CaCl2, Ca(OH)2, and Ca(HCOO)2. The compositions of gas and bio-oil were detected using gas chromatography/mass spectrometry (GC/MS). The characterizations of chars were examined using Brunauer–Emmett–Teller (BET) surface area and scanning electron microscopy (SEM). The results indicate that all three types of calcium salts helped to promote bio-oil yield and inhibit gas and char from forming. Regarding the composition of gas products, calcium salt additives increased the concentrations of H2 and CH4 while decreasing the concentration of CO. In addition, calcium salt additives facilitated the formation of phenol and alkyl-phenols in bio-oil, but reduced the yields of guaiacol and vanillin, in the order CaCl2 < Ca(OH)2 < Ca(HCOO)2. Furthermore, when compared with the addition of CaCl2, the chars prepared by the addition of Ca(OH)2 and Ca(HCOO)2 had relatively higher BET surface areas. In conclusion, Ca(HCOO)2 had the greatest positive influence in regard to the product quality of lignin pyrolysis whilst also elevating the yield of value-added chemicals in bio-oils.

Slow Pyrolysis of Cystoseira Barbata Brown Macroalgae

2018 ◽  
Vol 69 (3) ◽  
pp. 553-556 ◽  
Author(s):  
Doinita Roxana Cioroiu ◽  
Oana Cristina Parvulescu ◽  
Tanase Dobre ◽  
Cristian Raducanu ◽  
Claudia Irina Koncsag ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Fixed Bed ◽  
Fixed Bed Reactor ◽  
Bet Surface Area ◽  
Heat Flow Rate ◽  
Slow Pyrolysis ◽  
Process Factor ◽  
Bed Temperature ◽  
Cystoseira Barbata ◽  
Bio Oil

Slow pyrolysis of algal biomass of Cystoseira barbata was performed in a fixed bed reactor using carbon dioxide as a sweeping gas and a reactant in the process. Pyrolysis products consisted of a biochar, a bio-oil, and pyrolytic gases. According to a 23 factorial experiment, 8 tests were conducted for 1 hr at two levels of each process factor, i.e., specific heat flow rate (7540, 9215 W/m3), carbon dioxide superficial velocity (1.3, 2.6 cm/s), and bulk density of fixed bed biomass (221, 332 kg/m3). Correlations between these factors and final process responses in terms of mean bed temperature (461-663 oC), biochar yield (15.2-26.7%), bio-oil yield (29.9-34.8%), and BET surface area of biochar (45.17-91.12 m2/g) were established.

Characterization of Pyrolytic Oil and Char Obtained from Sugarcane Bagasse Pyrolysis

2021 ◽  
Vol 39 ◽  
pp. 75-84
Author(s):  
Ahmed Gaber H. Saif ◽  
Seddik S. Wahid ◽  
Mohamed R.O. Ali
Keyword(s):  
Sugarcane Bagasse ◽  
Gas Flow ◽  
Fixed Bed ◽  
Fixed Bed Reactor ◽  
Gas Chromatography Mass Spectrometry ◽  
Molecular Formula ◽  
Chemical Product ◽  
X Ray ◽  
Bio Oil ◽  
Pyrolytic Oil

Sugarcane bagasse pyrolysis in a fixed-bed reactor has been studied. The Pyrolytic oil and char obtained were characterized to determine their feasibility as fuels and chemical reagent in other processes. The runs were performed under the following conditions: temperature from 350°C–600°C, sample size of 0.5–1 mm, and an inert gas flow rate of 200 cm3/min. The study aimed to characterize the obtained oil and char to determine their feasibility as source of energy and chemical product. The product has been characterized by different techniques including gas chromatography–mass spectrometry (GC–MS), Fourier transform infrared spectroscopy (FTIR), X-ray powder diffraction (XRD), and energy-dispersive X-ray spectroscopy (EDX). The obtained bio-oil exhibited a molecular formula of CH1.03O0.28 N0.012 and a higher heating value (HHV) of 27.68 MJ/kg. These results indicated that it could be used after refining as a source of fuel and produced a chemical product. In addition, the obtained biochar (HHV = 31.53 MJ/kg) can be used as a solid fuel.

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 Experimental Investigation on the effect of Chemical Pretreatments of Slow-Pyrolyzed Nigerian Jatropha curcas L. Biomass Residues on Pyrolytic oil

2021 ◽  
pp. 4126-4152
Author(s):  
Fatai Abiola Lateef ◽  
Helen Olayinka Ogunsuyi
Keyword(s):  
Jatropha Curcas ◽  
Fixed Bed ◽  
Fixed Bed Reactor ◽  
Gas Chromatography Mass Spectrometry ◽  
Chemical Compositions ◽  
Jatropha Curcas L ◽  
Biomass Residues ◽  
Starting Point ◽  
Bio Oil ◽  
Chemical Pretreatments

In Nigeria, assemblage and discarding of residues from energy crops are increasingly becoming laborious and costly and may pose serious environmental challenges if not correctly managed. The Energy Commission of Nigeria’s long term (2016-2030) plan on the nation’s energy requirements is entirely non-fossil. This is attributable to the global decline of fossil fuel sources, soaring prices, climate crisis and the need to utilize hitherto abundant biomass resources for energy and chemical feedstocks purposes in Nigeria. In this research, an experimental study on the bio-oil generated through slow pyrolysis of Jatropha curcas L. biomass residues – Jatropha curcas L. seed shell (JSS) and Jatropha curcas L. fruit hull (JFH) were realized in a fixed bed reactor at 450 ℃ in a batch-wise step, biomass sample (1.14 mm) particle size, designed by authors. The biomass samples were subjected to pretreatment with 4% sulphuric and sodium hydroxide solutions each respectively. The Chemical compositions and functional groups available in the bio-oil of both raw and pretreated biomasses obtained at 450 ℃ were investigated by Gas Chromatography-Mass Spectrometry (GC-MS) and Fourier Transform- Infrared (FT-IR) spectroscopy analysis respectively. Scanning Electron Microscopy (SEM) was used to look into the residual biomass surface morphology of pretreated and untreated Jatropha curcas L. waste of JSS and JFH. The results acquired disclosed that the bio-oil obtained from JSS and JFH might be a principal liquid fuel starting point and chemical feedstocks.

scholarly journals Bio-Oil Characterizations of Spirulina Platensis Residue (SPR) Pyrolysis Products for Renewable Energy Development

2020 ◽  
Vol 849 ◽  
pp. 47-52
Author(s):  
Siti Jamilatun ◽  
Aster Rahayu ◽  
Yano Surya Pradana ◽  
Budhijanto ◽  
Rochmadi ◽  
...  
Keyword(s):  
Renewable Energy ◽  
Spirulina Platensis ◽  
Pyrolysis Temperature ◽  
Renewable Energy Sources ◽  
Fixed Bed ◽  
Fixed Bed Reactor ◽  
Oil Yield ◽  
Optimum Temperature ◽  
Pyrolysis Products ◽  
Bio Oil

Nowadays, energy consumption has increased as a population increases with socio-economic developments and improved living standards. Therefore, it is necessary to find a replacement for fossil energy with renewable energy sources, and the potential to develop is biofuels. Bio-oil, water phase, gas, and char products will be produced by utilizing Spirulina platensis (SPR) microalgae extraction residue as pyrolysis raw material. The purpose of this study is to characterize pyrolysis products and bio-oil analysis with GC-MS. Quality fuel is good if O/C is low, H/C is high, HHV is high, and oxygenate compounds are low, but aliphatic and aromatic are high. Pyrolysis was carried out at a temperature of 300-600°C with a feed of 50 grams in atmospheric conditions with a heating rate of 5-35°C/min, the equipment used was a fixed-bed reactor. The higher the pyrolysis temperature, the higher the bio-oil yield will be to an optimum temperature, then lower. The optimum temperature of pyrolysis is 550°C with a bio-oil yield of 23.99 wt%. The higher the pyrolysis temperature, the higher the H/C, the lower O/C. The optimum condition was reached at a temperature of 500°C with the values of H/C, and O/C is 1.17 and 0.47. With an increase in temperature of 300-600°C, HHV increased from 11.64 MJ/kg to 20.63 MJ/kg, the oxygenate compound decreased from 85.26 to 37.55 wt%. Aliphatics and aromatics increased, respectively, from 5.76 to 36.72 wt% and 1.67 to 6.67 wt%.

scholarly journals Effect of Ni(NO3)2 Pretreatment on the Pyrolysis of Organsolv Lignin Derived from Corncob Residue

Processes ◽  
2020 ◽  
Vol 9 (1) ◽  
pp. 23
Author(s):  
Wenli Wang ◽  
Yichen Liu ◽  
Yue Wang ◽  
Longfei Liu ◽  
Changwei Hu
Keyword(s):  
Sustainable Development ◽  
Fixed Bed ◽  
Value Added ◽  
Bio Oil ◽  
Fuels And Chemicals ◽  
Gas Products ◽  
Work Samples ◽  
Nickel Species ◽  
The Impact ◽  
Selective Formation

The thermal degradation of lignin for value-added fuels and chemicals is important for environment improvement and sustainable development. The impact of pretreatment and catalysis of Ni(NO3)2 on the pyrolysis behavior of organsolv lignin were studied in the present work. Samples were pyrolyzed at 500 ∘C with an upward fixed bed, and the characteristics of bio-oil were determined. After pretreatment by Ni(NO3)2, the yield of monophenols increased from 23.3 wt.% to 30.2 wt.% in “Ni-washed” and decreased slightly from 23.3 wt.% to 20.3 wt.% in “Ni-unwashed”. Meanwhile, the selective formation of vinyl-monophenols was promoted in “Ni-unwashed”, which indicated that the existence of nickel species promoted the dehydration of C-OH and breakage of C-C in pyrolysis. In comparison with “Water”, HHV of bio-oil derived from “Ni-unwashed” slightly increased from 27.94 mJ/kg to 28.46 mJ/kg, suggesting that the lowering of oxygen content in bio-oil is associated with improved quality. Furthermore, the content of H2 in gas products dramatically increased from 2.0% to 7.6% and 17.1%, respectively.

Comparison of the Yield and Properties of Bio-Oil Produced by Slow and Fast Pyrolysis of Rice Husks and Coconut Shells

2014 ◽  
Vol 625 ◽  
pp. 626-629 ◽  
Author(s):  
Mandy Su Zan Gui ◽  
Seyed Amirmostafa Jourabchi ◽  
Hoon Kiat Ng ◽  
Suyin Gan
Keyword(s):  
Maximum Yield ◽  
Fast Pyrolysis ◽  
Fixed Bed ◽  
Fixed Bed Reactor ◽  
Rice Husks ◽  
Standard Procedures ◽  
Bio Oil ◽  
American Society ◽  
Coconut Shells ◽  
Lower Water Content

Slow pyrolysis (SP) and fast pyrolysis (FP) of rice husks, coconut shells and their mixtures were studied in a fixed bed reactor. The objectives of this study were to compare the yields and properties of bio-oils produced using SP and FP methods within a pyrolysis temperature range of 400 °C to 600 °C. Three different biomass compositions, 100% rice husks (RH), 100% coconut shells (CS) and a mixture of 50% rice husks with 50% of coconut shells (RH50/CS50) were experimented. In SP, the maximum yield of bio-oil for RH, CS and RH50/CS50 were 45.45%, 37.01%, 38.29% at temperatures of 550 °C, 500 °C and 600 °C respectively. As for FP, the maximum bio-oil yield obtained for RH, CS and RH50/CS50 were 50.52%, 40.14% and 42.25% at temperatures of 500 °C, 600 °C and 550 °C respectively. At these optimum pyrolysis temperatures, the percentage differences in bio oil yields for SP and FP were 10.57%, 8.11% and 9.83% for RH, CS and RH50/CS50 respectively. Based on American Society for Testing and Materials (ASTM) standard procedures, the properties of bio-oil were characterised and it was found that the bio oil produced by FP at optimum temperatures were less acidic, higher density, lower water content and viscosity as compared to the bio-oil produced by SP method for all biomass compositions.

Study of Catalytic Pyrolysis of Chlorella with γ-Al2O3 Catalyst

2013 ◽  
Vol 873 ◽  
pp. 562-566 ◽  
Author(s):  
Juan Liu ◽  
Xia Li ◽  
Qing Jie Guo
Keyword(s):  
Water Content ◽  
Molecular Sieve ◽  
Catalytic Pyrolysis ◽  
Fixed Bed ◽  
Fixed Bed Reactor ◽  
Pyrolysis Oil ◽  
Heating Value ◽  
Lower Viscosity ◽  
Bio Oil ◽  
Liquid Yield

Chlorella samples were pyrolysed in a fixed bed reactor with γ-Al2O3 or ZSM-5 molecular sieve catalyst at 600°C. Liquid oil samples was collected from pyrolysis experiments in a condenser and characterized for water content, kinematic viscosity and heating value. In the presence of catalysts , gas yield decreased and liquid yield increased when compared with non-catalytic pyrolysis at the same temperatures. Moreover, pyrolysis oil from catalytic with γ-Al2O3 runs carries lower water content and lower viscosity and higher heating value. Comparison of two catalytic products, the results were showed that γ-Al2O3 has a higher activity than that of ZSM-5 molecular sieve. The acidity distribution in these samples has been measured by t.p.d, of ammonia, the γ-Al2O3 shows a lower acidity. The γ-Al2O3 catalyst shows promise for production of high-quality bio-oil from algae via the catalytic pyrolysis.

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