Influence of the Pyrolysis Temperature on Sewage Sludge Product Distribution, Bio-Oil, and Char Properties

2013 ◽  
Vol 27 (3) ◽  
pp. 1419-1427 ◽  
Author(s):  
Trung Ngoc Trinh ◽  
Peter Arendt Jensen ◽  
Kim Dam-Johansen ◽  
Niels Ole Knudsen ◽  
Hanne Risbjerg Sørensen
Keyword(s):  
Sewage Sludge ◽  
Pyrolysis Temperature ◽  
Product Distribution ◽  
Bio Oil

scholarly journals Influence of Pyrolysis Temperature on Product Distribution and Characteristics of Anaerobic Sludge

Energies ◽  
2019 ◽  
Vol 13 (1) ◽  
pp. 79
Author(s):  
Muhammad Usman Hanif ◽  
Mohammed Zwawi ◽  
Sergio C. Capareda ◽  
Hamid Iqbal ◽  
Mohammed Algarni ◽  
...  
Keyword(s):  
Pyrolysis Temperature ◽  
Product Distribution ◽  
Biofuel Production ◽  
Thermochemical Conversion ◽  
Anaerobic Sludge ◽  
Cow Dung ◽  
High Heating Value ◽  
Bio Oil ◽  
Different Temperatures ◽  
Combustible Gases

Pyrolysis of anaerobically digested sludge can serve as an efficient biomass for biofuel production. Pyrolysis produces products like char, bio-oil, and combustible gases by thermochemical conversion process. It can be used for sludge treatment that decreases sludge disposal problems. Sludge produced from anaerobic co-digestion (microalgae, cow dung, and paper) waste has high carbon and hydrogen content. We investigated the candidacy of the anaerobic sludge having high heating value (HHV) of 20.53 MJ/kg as a reliable biomass for biofuels production. The process of pyrolysis was optimized with different temperatures (400, 500, and 600 °C) to produce high quantity and improved quality of the products, mainly bio-oil, char, and gas. The results revealed that with the increase in pyrolysis temperature the quantity of char decreased (81% to 55%), bio-oil increased (3% to 7%), and gas increased (2% to 5%). The HHV of char (19.2 MJ/kg), bio-oil (28.1 MJ/kg), and gas (18.1 MJ/kg) were predominantly affected by the amount of fixed carbon, hydrocarbons, and volatile substance, respectively. The study confirmed that the anaerobic sludge is a promising biomass for biofuel production and pyrolysis is an efficient method for its safe disposal.

Production of Phenolic-Rich Bio-Oil from Catalytic Fast Pyrolysis of Biomass Over Tailored Fe-Based Catalysts

2020 ◽  
Vol 14 (2) ◽  
pp. 178-185 ◽  
Author(s):  
Shuangxia Yang ◽  
Xiaodong Zhang ◽  
Feixia Yang ◽  
Baofeng Zhao ◽  
Lei Chen ◽  
...  
Keyword(s):  
Calcination Temperature ◽  
Pyrolysis Temperature ◽  
Fast Pyrolysis ◽  
Product Distribution ◽  
Gas Chromatography Mass Spectrometry ◽  
Pyrolysis Gas ◽  
Bio Oil ◽  
Aldehydes And Ketones ◽  
Biomass Ratio ◽  
Pyrolysis Of Biomass

The objective of this study is to catalytically upgrade fast pyrolysis vapors of sawdust using various Fe-based catalysts for producing phenolic-rich bio-oil by analytical pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS) technique. A variety of parameters, including support characteristic, calcination temperature, pyrolysis temperature, as well as the catalyst-to-biomass ratio during the pyrolysis process were evaluated for their effects on product distribution of bio-oil. GC-MS analysis showed that compared to Fe–Mg and Fe–Al catalysts, the developed Fe–Ca catalyst significantly promoted the formation of phenols and its derivatives. The phenolic concentration declined with increasing calcination temperature and pyrolysis temperature, while increased monotonically along with increasing catalyst-to-biomass ratio. The phenolics concentration was high upto 81% (peak area) under optimum conditions of calcination temperature of 500 °C, pyrolysis temperature of 600 °C and catalyst-to-biomass ratio of 10. At higher catalyst-to-biomass ratio of 20, phenolics (88.03% in peak area) and hydrocarbons (including 7.86% of aromatics and 4.1% aliphatics) were the only two components that can be detected, with all the acids, aldehydes and ketones completely eliminated. This indicated the excellent capability of developed Fe–Ca catalyst in promoting the decomposition of lignin in biomass to generate phenolic compounds and meanwhile inhibiting the devolatilization of holocellulose.

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 One Year Residual Effect of Sewage Sludge Biochar as a Soil Amendment for Maize in a Brazilian Oxisol

2021 ◽  
Vol 13 (4) ◽  
pp. 2226
Author(s):  
Joisman Fachini ◽  
Thais Rodrigues Coser ◽  
Alyson Silva de Araujo ◽  
Ailton Teixeira do Vale ◽  
Keiji Jindo ◽  
...  
Keyword(s):  
Sewage Sludge ◽  
Grain Yield ◽  
Nutrient Availability ◽  
Pyrolysis Temperature ◽  
Residual Effect ◽  
Soil Nutrient ◽  
Mineral Fertilizer ◽  
Corn Yield ◽  
Soil Nutrient Availability ◽  
One Year

The thermochemical transformation of sewage sludge (SS) to biochar (SSB) allows exploring the advantages of SS and reduces possible environmental risks associated with its use. Recent studies have shown that SSB is nutrient-rich and may replace mineral fertilizers. However, there are still some questions to be answered about the residual effect of SSB on soil nutrient availability. In addition, most of the previous studies were conducted in pots or soil incubations. Therefore, the residual effect of SSB on soil properties in field conditions remains unclear. This study shows the results of nutrient availability and uptake as well as maize yield the third cropping of a three-year consecutive corn cropping system. The following treatments were compared: (1) control: without mineral fertilizer and biochar; (2) NPK: with mineral fertilizer; (3) SSB300: with biochar produced at 300 °C; (4) SSB300+NPK; (5) SSB500: with biochar produced at 500 °C; and (6) SSB500+NPK. The results show that SSB has one-year residual effects on soil nutrient availability and nutrient uptake by maize, especially phosphorus. Available soil P contents in plots that received SSB were around five times higher than the control and the NPK treatments. Pyrolysis temperature influenced the SSB residual effect on corn yield. One year after suspending the SSB application, SSB300 increased corn yield at the same level as the application of NPK. SSB300 stood out and promoted higher grain yield in the residual period (8524 kg ha−1) than SSB500 (6886 kg ha−1). Regardless of pyrolysis temperature, biochar boosted the mineral fertilizer effect resulting in higher grain yield than the exclusive application of NPK. Additional long-term studies should be focused on SSB as a slow-release phosphate fertilizer.

scholarly journals Study on the hydrothermal liquefaction of antibiotic residues with molecular sieve catalysts in the ethanol–water system: focus on product distribution and characterization

RSC Advances ◽  
2021 ◽  
Vol 11 (43) ◽  
pp. 26763-26772
Author(s):  
Jian Yang ◽  
Chen Hong ◽  
Yi Xing ◽  
Zixuan Zheng ◽  
Zaixing Li ◽  
...  
Keyword(s):  
Molecular Sieve ◽  
Water System ◽  
Product Distribution ◽  
Hydrothermal Liquefaction ◽  
Raw Material ◽  
Antibiotic Residues ◽  
Bio Oil ◽  
Antibiotic Residue ◽  
System Focus

In this study, the antibiotic residue was used as a raw material to catalyze hydrothermal liquefaction (HTL) in an ethanol–water system to prepare bio-oil.

scholarly journals Pyrolysis-GC/MS Analysis of Fast Growing Wood Macaranga Species

2021 ◽  
Vol 6 (1) ◽  
pp. 141-158
Author(s):  
R.R. Dirgarini J.N. Subagyono ◽  
Ying Qi ◽  
Alan L. Chaffee ◽  
Rudianto Amirta ◽  
Marc Marshall
Keyword(s):  
Thermal Degradation ◽  
Pyrolysis Temperature ◽  
Woody Biomass ◽  
Biofuel Production ◽  
Flash Pyrolysis ◽  
Fast Growing ◽  
Ms Analysis ◽  
Bio Oil ◽  
Different Temperatures ◽  
High Yields

Py-GC/MS analysis of six different species of fast growing Macaranga wood has been studied. Flash pyrolysis was conducted at different temperatures (250-850 oC) under a flow of helium followed by GC/MS analysis of the products. The total pyrolysis yields of the six different species of Macaranga were mostly between 40 and 90% within the range of pyrolysis temperature applied.  Pyrolysis of the woody biomass produced compounds which are mostly derived from thermal degradation or volatilization of lignin and cellulose/hemicellulose, the original major constituents of the biomass. The Py-GC/MS technique indicated that M. gigantea was the most potential species for biofuel production and the optimum pyrolysis temperature to produce high yields of bio-oil was 450 oC.

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