Influences of pyrolysis conditions in the production and chemical composition of the bio-oils from fast pyrolysis of sewage sludge

Huang, Xin; Cao, Jing‐Pei; Shi, Peng; Zhao, Xiao-Yan; Feng, Xiaobo; Zhao, Yunpeng; Fan, Xing; Wei, Xian‐Yong; Takarada, Takayuki

doi:10.1016/j.jaap.2014.10.003

Cited by 115 publications

(56 citation statements)

References 39 publications

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“…2(a). The formation of a peak at a temperature lower than 200°C could be attributed to the vaporization of moisture attached to the sample surface [8,[25][26]. However, in this study, a few peaks appeared below 200°C because SALSE was well dried, which was consistent with the fact that the moisture content of SALSE was as low as 1.68%.…”

Section: Thermogravimetric Analysis Of the Sewage Sludge After Lipid supporting

confidence: 80%

Bio-oil production using residual sewage sludge after lipid and carbohydrate extraction

Supaporn

Kim

et al. 2018

Environmental Engineering Research

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In order to maximize the utilization of sewage sludge, a waste from wastewater treatment facility, the residual sewage sludge generated after lipid and carbohydrate extraction for biodiesel and bioethanol production was used to produce bio-oil by pyrolysis. Thermogravimetric analysis showed that sludge pyrolysis mainly occurred between 200 and 550°C (with peaks formed around 337.0 and 379.3°C) with the decomposition of the main components (carbohydrate, lipid, and protein). Bio-oil was produced using a micro-tubing reactor, and its yield (wt%, g-bio-oil/g-residual sewage sludge) increased with an increase in the reaction temperature and time. The maximum bio-oil yield of 33.3% was obtained after pyrolysis at 390°C for 5 min, where the largest amount of energy was introduced into the reactor to break the bonds of organic compounds in the sludge. The main components of bio-oil were found to be trans-2-pentenoic acid and 2-methyl-2-pentenoic acid with the highest selectivity of 28.4% and 12.3%, respectively. The kinetic rate constants indicated that the predominant reaction pathway was sewage sludge to bio-oil (0.1054 min-1), and subsequently to gas (0.0541 min-1), rather than the direct conversion of sewage sludge to gas (0.0318 min-1).

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Section: Thermogravimetric Analysis Of the Sewage Sludge After Lipid supporting

confidence: 80%

Bio-oil production using residual sewage sludge after lipid and carbohydrate extraction

Supaporn

Kim

et al. 2018

Environmental Engineering Research

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“…As with most other complex materials, the vast majority of papers focus on semiquantitative analysis of bio‐oil, or on the more detailed analysis of a single component/group of components . Only a small number of studies show quantitative data of the composition of SS pyrolysis liquid . Sánchez et al.…”

Section: Introductionmentioning

confidence: 84%

“…On the other hand,t he reaction atmosphere does not have anys ignificant effect on the production of this chemical family.W ith regard to the effect of other operationalc onditions,H uang et ald etermined that the yield of aliphatic nitrilesd ecreased with increasingp yrolysis temperature from 400 to 700 8C, at the expense of increasing the yield of aromatic nitriles. [22] LCANs are valuable chemicals,m ainly used as plasticizers, rubber softeners,o il additives in lubricants,a nd as chemical intermediates to produce insecticidesa nd amines. [30] Cao et al achieved the analyticals eparation of LCANs from the rest of the SS pyrolysis liquid by using ac olumn packed with silica gel10% ethyl acetateinn-hexane as the eluent.…”

Section: Aliphatic Nitrilesmentioning

confidence: 99%

Assessment of the Production of Value‐Added Chemical Compounds from Sewage Sludge Pyrolysis Liquids

et al. 2016

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A procedure to analyze sewage sludge (SS) pyrolysis liquids based on solvent fractionation has been developed. Pyrolysis liquids are separated into three different fractions: heptane soluble (Hep‐sol), dichloromethane soluble (DCM‐sol), and hydrochloric acid soluble (HCl‐sol). Diverse techniques (GC‐MS, UPLC‐TOF‐MS) were employed to qualitatively and quantitatively analyze liquid fractions to assess the potential production of value‐added chemicals. Aliphatic hydrocarbons, aliphatic nitriles, and steroids were mostly separated in the Hep‐sol fraction, phenols and fatty acids in the DCM‐sol fraction, and carboxylic acids and amides in the HCl‐sol fraction. The largest production was obtained for ammonia (10–14 kg per tonne of SS) and α‐olefins (8–9 kg per tonne of SS). The potential production of some of these value‐added chemicals from SS pyrolysis liquid was compared with their current European production. In the case of α‐olefins, 16 % of their European production could be achieved by SS pyrolysis.

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“…Moreover, a certain portion of organic matter reacted with metal ions forming thermally stable chelate compounds during this period. Some relatively thermally stable chelate started decomposing from 400 to 700 • C, leading to 5.96% weight loss [24][25][26][27][28]. Over 700 • C it showed 19.7% weight loss and an apparent endothermic peak at approximately 800 • C attributed to the breakdown of CaCO 3 from the sludge [29].…”

Section: Themostability Of Sludgementioning

confidence: 99%

Feasibility and Carbon Footprint Analysis of Lime-Dried Sludge for Cement Production

Zhao

Lin

et al. 2020

Sustainability

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Cement manufacturing and the treatment of sludge are considered both energy-intensive industries and major greenhouse gas (GHG) emitters. However, there are still few studies on comprehensive carbon footprint analysis for adding municipal sludge in the cement production. In this study, the lime-dried sludge blended with calcium oxide at the mass mixing ratio of 10% was utilized as raw material for the preparation of Portland cement. The chemical and physical properties of sludge were analyzed. A set of carbon footprint calculation methods of lime-drying treatment of sludge and reuse in cement kilns was then established to explore the feasibility of coprocessing lime-dried sludge in cement kilns. The results showed lime-dried sludge containing CaO, SiO2, Al2O3, and Fe2O3 was ideal for cement production as raw material. However, the water content of lime-dried sludge should be strictly limited. The lime-drying process presented the biggest carbon emission (962.1 kg CO2-eq/t sludge), accounting for 89.0% of total emissions. In the clinker-production phase, the lime-dried sludge as raw material substitute and energy source gained carbon credit of 578.8 and 214.2 kg CO2-eq/t sludge, respectively. The sludge used for producing cement clinker could reduce carbon emissions by 38.5% to 51.7%. The addition ratio of lime and stacking time in the sludge lime-drying process could greatly affect the carbon footprint of coprocessing lime-dried sludge in cement kiln.

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Influences of pyrolysis conditions in the production and chemical composition of the bio-oils from fast pyrolysis of sewage sludge

Cited by 115 publications

References 39 publications

Bio-oil production using residual sewage sludge after lipid and carbohydrate extraction

Bio-oil production using residual sewage sludge after lipid and carbohydrate extraction

Assessment of the Production of Value‐Added Chemical Compounds from Sewage Sludge Pyrolysis Liquids

Feasibility and Carbon Footprint Analysis of Lime-Dried Sludge for Cement Production

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