Pyrolysis of oil shale by solid heat carrier in an innovative moving bed with internals

Lai, Dengguo; Chen, Zhaohui; Shi, Yucai; Lin, Lanxin; Zhan, Jiewei; Gao, Shiqiu; Xu, Guangwen

doi:10.1016/j.fuel.2015.07.068

Cited by 41 publications

(12 citation statements)

References 25 publications

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“…Siramard et al reported that the reduced pyrolysis pressure in this reactor reduced heat transfer but raised the shale oil yield. This reactor was also adopted on oil shale pyrolysis by Lai et al and Lin et al, illustrating a similar improvement on yield and quality of oil shale. Recently, Lin et al found that the increased quantity of the metallic plate number reinforced the heat transfer of oil shale and increased the shale oil yield in this reactor, and they postulated that interstices created by metallic plates caused significant offset of gaseous product flow in particles to reduce both the reaction time and secondary cracking of pyrolysis products compared to the case without plates.…”

Section: Introductionmentioning

confidence: 85%

Effects of Metallic Heating Plates on Coal Pyrolysis Behavior in a Fixed-Bed Reactor Enhanced with Internals

Wang

et al. 2017

Energy Fuels

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A newly configured fixed-bed reactor with internals has been proposed to enhance the coal pyrolysis performance. In this study, the effects of metallic plates on coal pyrolysis behavior were investigated in this reactor. The results show that the increased quantity of the metallic plates enhanced the heat transfer and shortened the residence time of volatiles within the coal particles. In addition, the pressure drop results suggest that the increased quantity of plates caused short circuiting of gas and raised the particle interstices, which reduced the gas diffusion resistance of pyrolysis products. Therefore, more gaseous pyrolysis products flowed into central low-temperature coal bed and escaped from the gas collection pipe, suppressing the secondary reaction of pyrolysis products and increasing the tar yield and quality. At a furnace temperature of 900 °C, the increase in metallic plates from 0 to 8 raised the tar yield and light tar fraction from 5.20 and 69.5 wt % to 7.86 and 77.0 wt %, respectively. Meanwhile, the ≤C14 hydrocarbons were elevated from 42.11 to 50.44 wt %, but the ≥C20 hydrocarbons were lowered from 29.95 to 19.74 wt %. However, an excessive increase in plates raised the heating rate of coal, cracking more pyrolysis products and decreasing the tar yield and quality.

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Section: Introductionmentioning

confidence: 85%

Effects of Metallic Heating Plates on Coal Pyrolysis Behavior in a Fixed-Bed Reactor Enhanced with Internals

Wang

et al. 2017

Energy Fuels

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“…In this way, the moving bed technology with a solid heat carrier (hot shale ash) has emerged due to the greater adaptability for treating the small size of the oil shale, higher oil shale yield, and the gas separation system in a simple way. 145,147 Upon review, the recent studies on the pyrolysis process integrated with MBT support the idea that many researchers have employed this technology for converting biomass to syngas. 148−152 The integrated pyrolysis technology with the moving bed configuration has eliminated the drying step, which is one of the main steps to obtain useful energy from biomass.…”

Section: Introductionmentioning

confidence: 93%

“…The pyrolysis of the oil shale has been recently studied in an innovative MBR. , On the basis of the traditional oil shale pyrolysis system, the heat carrier passes through the solid oil shale to supply the required energy of the pyrolysis process. Hence, the gaseous products are blended with the heat carrier and make a homogeneous gaseous mixture.…”

Section: Experimental Studiesmentioning

confidence: 99%

“…The separation of the gaseous mixture is a high-cost process and requires a large volume of the heat carrier, which adversely affects the purity of the pyrolysis products. On the other hand, this process is only able to pyrolyze the oil shale particles which have diameters with more than 15 mm and constitute around 15–20% of the total oil shale sample. These drawbacks of the traditional pyrolysis processes have forced researchers to develop an innovative strategy to overcome these limitations.…”

Section: Experimental Studiesmentioning

confidence: 99%

“…These drawbacks of the traditional pyrolysis processes have forced researchers to develop an innovative strategy to overcome these limitations. In this way, the moving bed technology with a solid heat carrier (hot shale ash) has emerged due to the greater adaptability for treating the small size of the oil shale, higher oil shale yield, and the gas separation system in a simple way. , …”

Section: Experimental Studiesmentioning

confidence: 99%

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Moving Bed Reactors: Challenges and Progress of Experimental and Theoretical Studies in a Century of Research

Shirzad

Karimi

Silva

et al. 2019

Ind. Eng. Chem. Res.

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Moving bed reactors (MBRs) have been proposed as a sign of significant progress in the reaction engineering area for performance improving and energy saving. Since their advent in 1890, the MBRs have attracted a wide acceptance in different industries, while they were first developed for the drying industries. The progress that this technology has made during its evolution led to the introduction of these reactors as a pioneer strategy in other industries including petroleum, petrochemical, pyrolysis, and biomass industries. In the traditional reaction systems, the process performance decreases during the operational conditions, while MBRs have obviated this drawback by having an all-around permanent acceptable efficiency. In this context, the present work provides an overview on the evolution of MBRs by investigating the main experimental and theoretical studies. In this way, the experimental studies have typically taken into account operational conditions and production rates of different products, while in the theoretical research, modeling, and simulation of conventional processes, the evaluation of novel configurations and the optimization techniques have been investigated. In the end, some suggestions are proposed to modify the traditional MBRs as helpful ideas for further studies.

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Microwave pyrolysis of oil shale for high-quality oil and gas production

Yue

et al. 2022

J Therm Anal Calorim

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Pyrolysis of oil shale by solid heat carrier in an innovative moving bed with internals

Cited by 41 publications

References 25 publications

Effects of Metallic Heating Plates on Coal Pyrolysis Behavior in a Fixed-Bed Reactor Enhanced with Internals

Effects of Metallic Heating Plates on Coal Pyrolysis Behavior in a Fixed-Bed Reactor Enhanced with Internals

Moving Bed Reactors: Challenges and Progress of Experimental and Theoretical Studies in a Century of Research

Microwave pyrolysis of oil shale for high-quality oil and gas production

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