Production of char from sewage sludge employing hydrothermal carbonization: Char properties, combustion behavior and thermal characteristics

Peng, Chuan; Zhai, Yuanzheng; Zhu, Yun; Xu, Bibo; Wang, Tengfei; Li, Caiting; Zeng, Guangming

doi:10.1016/j.fuel.2016.02.068

Cited by 332 publications

(126 citation statements)

References 40 publications

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“…In the case of sewage sludge, the hydrothermal carbonization process was not so widely investigated, but studies were largely focused on the properties of solid product, energy recovery rate, hydrochar yields and its combustion characteristic, and improved dewaterability of sludge. The effects of hydrothermal carbonization were evaluated by varying the temperature and time [12][13][14][15][16][17][18][19]. In fact, regarding Polish conditions, there are no published results concerning the HTC of sewage sludge so far, that is why this technology can be named a novel pre-treatment method.…”

Section: Introductionmentioning

confidence: 99%

A novel method of sewage sludge pre-treatment - HTC

Wilk

2016

E3S Web Conf.

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Abstract. The aim of the paper is to present a relatively new technology -hydrothermal carbonization (HTC) of municipal sewage sludge. The HTC process was conducted in a stainless steel, Zipperclave Stirred Reactor, with a volume of 1000 ml, equipped with a MagneDrive Agitator. The control panel provides a programme which regulates the heater temperature and mixer speed. The main parameters of the process were temperature (~200C), pressure (~1.5 MPa) and residence time (4, 7, 10, and 12 h). In order to understand the process, the physical, chemical, thermal, and structural characteristics of the solid product, hydrochar, was investigated. Therefore, the ultimate and proximate analyses, and HHV for raw material and obtained hydrochar are presented. The majority of carbon, of the initial present carbon, remained within hydrochar. TA analysis was used to detect the initial and final temperature for the combustion of raw material and hydrochar. This technique is very useful for predicting the combustion characteristics of carbonaceous material. When considering the use of hydrochar as a solid fuel, more energy can be derived from hydrochar than from e.g. incineration of waste, and its carbon emission should be less significant. Therefore, HTC can be an environmentally beneficial technique for the combustion process.

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Section: Introductionmentioning

confidence: 99%

A novel method of sewage sludge pre-treatment - HTC

Wilk

2016

E3S Web Conf.

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“…Besides, HHV, which is 11.6 MJ/kg, is lower than the average HHV (14.0 MJ/kg) for eight SS samples whose HHVs vary between 5.2 and 20.1 MJ/kg. Also, the fixed carbon (FC) contents of SS samples used in previous studies change in very wide range of 1.4–18.5% on dry basis, and the average value for these 13 samples was 6.8 . However, our sample is even poorer than all of these samples with a FC content of 1.4%.…”

Section: Resultsmentioning

confidence: 61%

“…The HHV and the ash content of solid fuels are the key parameters to characterize the fuel quality, and the analysis results of SS sample indicate that it has relatively poor fuel properties. The ash content, which is 47.3%, is relatively high compared to the average ash content (40.0%) of 13 different samples of SS in literature whose ash contents change in range of 27.3–53.8% on dry basis. Besides, HHV, which is 11.6 MJ/kg, is lower than the average HHV (14.0 MJ/kg) for eight SS samples whose HHVs vary between 5.2 and 20.1 MJ/kg.…”

Section: Resultsmentioning

confidence: 71%

Co‐combustion of lignite with sewage sludge and refuse‐derived fuel

Ozfidan

Haykırı-Açma

Yaman

2019

Env Prog and Sustain Energy

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Burning behavior of fuel blends consisted of lignite samples and waste biomass species such as sewage sludge (SS) and refuse‐derived fuel (RDF) was studied. The blends where the wastes account for 5, 10, and 15 wt% were burned in a thermal analyzer up to 900°C. The nonisothermal burning kinetics were established using Borchardt and Daniels method that bases on the data obtained from differential scanning calorimetry. The maximum rate of combustion (Rmax), the peak temperature (TR‐max), the ignition temperature (Tign), and the burnout temperature (Tb) that predicts the thermal reactivity were considered to evaluate the effects of RDF and SS on the burning characteristics of the lignite samples. It was determined that the combinations of the additive behavior and the synergistic interactions govern the burning characteristics of the fuel blends. The thermal reactivity of the samples can be arranged in the order of RDF > lignite > SS. On the other hand, blending of RDF or SS with the lignite samples did not led to any significant segregation in the heat flow characteristics, and can be concluded that these wastes can be safely burned with lignite.

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“…4 [25]. The intensity of this peak decreased after carbonization, indicating the ignition loss of -OH group because of the dehydration and the dehydrogenation reactions [26].…”

Section: Functional Groups Analysesmentioning

confidence: 97%

Characterization and adsorption properties of low-cost sewage sludge-derived carbon by using poly-aluminium chloride as pore-forming agent

Wang¹,

Song²,

Peng³

et al. 2016

Proceedings of the 2016 5th International Conference on Sustainable Energy and Environment Engineering (ICSEEE 2016)

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Abstract. We have demonstrated a facile and economical method for the synthesis of the sewage sludge-derived carbon. This product was prepared by using poly-aluminium chloride (PAC) as pore-forming agent through high-temperature pyrolysis at 900℃, and employed for the removal of phenol from water. Thermodynamic properties, textural evolution, morphological structure, and surface functional groups of product are characterized. Moreover, the total pore volumes and SSA of the residual carbon increased to 0.1727 cm 3 /g and 141.2 m 2 /g, that expanded to 2.3 times and 2.5 times compared with direct carbonized sample (0.075 cm 3 /g and 55.45 m 2 /g), respectively. The results indicated that the addition of PAC had important effect on the texture, surface properties and adsorption performance. The adsorption kinetics and isotherms studies were investigated in details to reveal that the kinetics and equilibrium adsorptions are well-described by pseudo-second-order kinetics and Langmuir isotherm model, respectively. Remarkably, the resulting adsorbent showed comparably adsorption capacity with the commercial activated carbons. Meanwhile, our method is more economical than other chemical activation methods.

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Production of char from sewage sludge employing hydrothermal carbonization: Char properties, combustion behavior and thermal characteristics

Cited by 332 publications

References 40 publications

A novel method of sewage sludge pre-treatment - HTC

A novel method of sewage sludge pre-treatment - HTC

Co‐combustion of lignite with sewage sludge and refuse‐derived fuel

Characterization and adsorption properties of low-cost sewage sludge-derived carbon by using poly-aluminium chloride as pore-forming agent

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