Modeling and simulation of coupled pyrolysis and gasification of oily sludge in a rotary kiln

Gao, Ningbo; Jia, Xiangyu; Ge, Gao; Ma, Zhe; Quan, Cui; Naqvi, Salman Raza

doi:10.1016/j.fuel.2020.118152

Cited by 56 publications

(17 citation statements)

References 55 publications

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“…Oil sludge is hazardous waste discharged during the process of crude oil extraction, transportation, storage and refining. According to [115] , nearly 3 × 10 6 tons of oil sludge is produced per annum in China, the total world production is equal to 160 million metric tonnes per year. In general, oily sludge is composed of 15–50% PHCs, 30%-85% water and 5%-46% solid [7] .…”

Section: Oily Sludge Treatmentmentioning

confidence: 99%

Recent advances in applications of power ultrasound for petroleum industry

Luo

Gong

et al. 2021

Ultrasonics Sonochemistry

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Section: Oily Sludge Treatmentmentioning

confidence: 99%

Recent advances in applications of power ultrasound for petroleum industry

Luo

Gong

et al. 2021

Ultrasonics Sonochemistry

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“…It is the need of the time to introduce an alternate energy approach to meet current and future energy demands [6]. e replacement of conventional fossil fuels with sewage sludge, coal, and lignocellulosic biomass fuels as renewable energy resources is considered promising as these have already contributed to around 10% of the global energy supply [7][8][9][10][11][12]. Soncini et al stated that from the past thirty years, lignocellulosic biomass was a focal point of research for renewable energy because 56% of energy is provided by biomass, 26% by solar, 11% by wind power, 5% by geothermal energy, and 2% by hydropower [13].…”

Section: Introductionmentioning

confidence: 99%

A Comprehensive Review on Thermal Coconversion of Biomass, Sludge, Coal, and Their Blends Using Thermogravimetric Analysis

Hameed

Naqvi

et al. 2020

Journal of Chemistry

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Lignocellulosic biomass is a vital resource for providing clean future energy with a sustainable environment. Besides lignocellulosic residues, nonlignocellulosic residues such as sewage sludge from industrial and municipal wastes are gained much attention due to its large quantities and ability to produce cheap and clean energy to potentially replace fossil fuels. These cheap and abundantly resources can reduce global warming owing to their less polluting nature. The low-quality biomass and high ash content of sewage sludge-based thermal conversion processes face several disadvantages towards its commercialization. Therefore, it is necessary to utilize these residues in combination with coal for improvement in energy conversion processes. As per author information, no concrete study is available to discuss the synergy and decomposition mechanism of residues blending. The objective of this study is to present the state-of-the-art review based on the thermal coconversion of biomass/sewage sludge, coal/biomass, and coal/sewage sludge blends through thermogravimetric analysis (TGA) to explore the synergistic effects of the composition, thermal conversion, and blending for bioenergy production. This paper will also contribute to detailing the operating conditions (heating rate, temperature, and residence time) of copyrolysis and cocombustion processes, properties, and chemical composition that may affect these processes and will provide a basis to improve the yield of biofuels from biomass/sewage sludge, coal/sewage sludge, and coal/biomass blends in thermal coconversion through thermogravimetric technique. Furthermore, the influencing factors and the possible decomposition mechanism are elaborated and discussed in detail. This study will provide recent development and future prospects for cothermal conversion of biomass, sewage, coal, and their blends.

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“…OS contains a large number of petroleum substances, 5 and organic content is higher compared with biomass and sewage sludge, which is very suitable for gasification. Gao et al 6 simulated the coupling process of pyrolysis and gasification of OS in a rotary kiln and found that the yield of gaseous products CH 4 , C 2 H 4 , C 2 H 6 , CO, and H 2 increased rapidly with the increase of temperature. Martínez et al 7 analyzed the thermal conversion process of OS from the perspective of thermodynamics and established the simulation kinetic model of air/steam mixture with Aspen Hysys software that was used to evaluate the influence of gasification agent on OS gasification parameters.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on kinetic characteristics of oil sludge gasification

Chu

Gong²,

Wang

et al. 2021

Asia-Pacific J Chem Eng

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Oil sludge (OS) is a typical dangerous waste in petroleum industry, which also contains abundant energy. The purpose of this study was to recover resources from OS gasification. To figure out the gasification process, a thermal analyzer was used to carry out OS gasification experiments under steam/nitrogen atmosphere with different heating rates. Results showed that the OS gasification reaction could be divided into five stages: free water volatilization, the escape of light components, the cracking of heavy components and steam reforming, the charring process and water gas shift (WGS) reactions, and inorganic mineral decomposition. The activation energy (E), pre‐exponential factor (A), enthalpy change (ΔH), Gibbs free energy change (ΔG), and entropy change (ΔS) of three main reaction stages (Stages 2–4) were analyzed through kinetic and thermodynamic analysis. From Stage 2 to Stage 4, E, ΔH, and ΔS decreased from 118.80 kJ·mol−1, 113.92 kJ·mol−1, and −4.09 J·(K mol)−1 to 13.19 kJ·mol−1, 5.92 kJ·mol−1, and −234.06 J·(K mol)−1, respectively. Nevertheless, ΔG increased from 116.01 to 210.04 kJ·mol−1. From these parameters, it could be found that the decrease of E was beneficial to the reaction. However, the values of ΔG were always positive and the reaction could not happen spontaneously.

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Modeling and simulation of coupled pyrolysis and gasification of oily sludge in a rotary kiln

Cited by 56 publications

References 55 publications

Recent advances in applications of power ultrasound for petroleum industry

Recent advances in applications of power ultrasound for petroleum industry

A Comprehensive Review on Thermal Coconversion of Biomass, Sludge, Coal, and Their Blends Using Thermogravimetric Analysis

Experimental study on kinetic characteristics of oil sludge gasification

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