Influence of pyrolysis condition and transition metal salt on the product yield and characterization via Huadian oil shale pyrolysis

Jiang, Haifeng; Lee, Song; Cheng, Zhiqiang; Chen, Jie; Zhang, Li; Zhang, Mingyue; Hu, Meijuan; Li, Jianing; Li, Junfeng

doi:10.1016/j.jaap.2015.01.020

Cited by 64 publications

(34 citation statements)

References 31 publications

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“…The non-condensable gas was passed through an infrared in-line analyzer after drying for real-time detection. The yield of the pyrolysis product was then obtained according to the work of Jiang et al [12].…”

Section: Os Pyrolysismentioning

confidence: 99%

Effect of Shale Ash-Based Catalyst on the Pyrolysis of Fushun Oil Shale

et al. 2019

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The effect of shale ash (SA)-based catalysts (SA as carriers to support several transition metal salts, such as ZnCl2, NiCl2·6H2O, and CuCl2·2H2O) on oil shale (OS) pyrolysis was studied. Results showed that SA promoted OS pyrolysis, and the optimum weight ratio of OS:SA was found to be 2:1. The SA-supported transition metal salt catalyst promoted the OS pyrolysis, and the catalytic effect increased with increasing load of the transition metal salt within 0.1–3.0 wt%. The transition metal salts loaded on the SA not only promoted OS pyrolysis and reduced the activation energy required but also changed the yield of pyrolysis products (reduced shale oil and semi-coke yields and increased gas and loss yield). SA-supported 3 wt% CuCl2·2H2O catalyst not only exhibited the highest ability to reduce the activation energy in OS pyrolysis (32.84 kJ/mol) but also improved the gas and loss yield, which was 4.4% higher than the uncatalyzed reaction. The supporting transition metal salts on the SA also increased the content of short-chain hydrocarbons in aliphatic hydrocarbons in shale oil and catalyzed the aromatization of aliphatic hydrocarbons to form aromatic hydrocarbons. The catalytic activity of the transition metal salt on the SA-based catalyst for OS pyrolysis decreased in the order of CuCl2·2H2O > NiCl2·6H2O > ZnCl2.

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Section: Os Pyrolysismentioning

confidence: 99%

Effect of Shale Ash-Based Catalyst on the Pyrolysis of Fushun Oil Shale

et al. 2019

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“…On the other hand, the addition of the catalyst probably results in the change of the physical structure of oil shale particles during the pyrolysis process [33]. Qi et al [34] also reported that the pore structure of char changed significantly during the catalytic pyrolysis of coal.…”

Section: Product Yieldmentioning

confidence: 99%

“…Meanwhile, there was also shown that Fe 2 O 3 had a positive effect on the breakdown of organic fuels [23]. In addition, Jiang et al [24] proposed that the transition metal Co ion could also act as the activation center to accelerate the breakdown of chemical bonds in oil shale organic matter, and the Co ion could increase the selectivity of aromatic hydrocarbons and promote olefin aromatization. Williams and Chishti [25,26] developed a two-stage oil shale pyrolysis reactor incorporating a second batch reactor using a zeolite ZSM-5 catalyst.…”

Section: Introductionmentioning

confidence: 99%

Catalytic Effects of Fe- And Ca-Based Additives on Gas Evolution During Pyrolysis of Dachengzi Oil Shale of China

Wang¹,

Song²,

Jiang³

2018

Oil Shale

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The pyrolysis of Dachengzi oil shale (OS), Huadian City, China, was carried out in a stainless-steel cylindrical retort at 520 °C both in the absence and presence of catalyst under argon atmosphere to evaluate the catalytic effects of Fe 2 O 3 and CaCO 3 additives on the products yield and characteristics of non-condensable gases. The results showed that the catalyst significantly affected the reactivity of OS kerogen pyrolysis. The shale oil yield increased after adding the catalyst, especially Fe 2 O 3 , but the shale char yield decreased in the presence of the catalyst. The noncondensable gases yield rose in the CaCO 3-catalysed pyrolysis and declined upon the Fe 2 O 3-catalysed process, indicating that CaCO 3 had a more pronounced catalytic effect on the secondary reactions of oil vapors. In addition, the gaseous products obtained both with and without the catalyst had a higher volume content of CO 2 , CH 4 and H 2 , and a lower volume content of CO and C 2-C 4 hydrocarbons. The peak concentrations of CO 2 and H 2 increased in the presence of the catalyst, especially Fe 2 O 3 , while that of CO enhanced with addition of CaCO 3 as a catalyst. H 2 was generated at higher temperature compared to CO 2 and CO. Furthermore, Fe 2 O 3 and CaCO 3 exhibited different effects on the evolution of C 1-C 4 hydrocarbons. COS and H 2 S evolved almost simultaneously, the amount of H 2 S released being higher than that of COS. The peak concentrations of the said gases decreased with adding the catalyst, especially Fe 2 O 3. The non-condensable gases produced both before and after catalysis mainly consisted of CO 2 and CH 4 , and some minor gases, in terms of mass distribution. The mass contents of ethane, butane, CO 2 and H 2 increased after the use of the catalyst, while those of butane, H 2 S and COS decreased. Moreover, adding Fe 2 O 3 and CaCO 3 resulted in the decline in the ethene/ethane and propene/propane ratios, respectively, suggesting that different catalysts possibly led to different changes in the physical structure of oil shale and then caused the secondary reactions of pyrolysis products to proceed to different extents.

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“…Konist et al studied the effects of supply gas with different N 2 , O 2 and CO 2 ratios on C-bearing groups decomposition and SO 2 production of oil shale at 800, 850 and 900 • C and found that the CO 2 content in supply gas has the greatest impact [15]. Jiang et al determined the optimal pyrolysis temperature of Huadian oil shale and evaluated the catalytic properties of transition metal salts on oil shale [16]. Wang found that increase in temperature rise rate could accelerate the heat transfer rate and improve the pyrolysis rate of organic materials, which are inductive to pyrolysis product extraction.…”

Section: Of 12mentioning

confidence: 99%

Study on Low Temperature Oxidation Characteristics of Oil Shale Based on Temperature Programmed System

Wang

Liu

et al. 2018

Energies

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Oil shale is a kind of high-combustion heat mineral, and its oxidation in mining and storage are worth studying. To investigate the low-temperature oxidation characteristics of oil shale, the temperature, CO, alkane and alkene gases were analyzed using a temperature-programmed device. The results showed that the temperature of oil shale underwent three oxidation stages, namely a slow low-temperature oxidation stage, a rapid temperature-increasing oxidation stage, and a steady temperature-increasing stage. The higher the air supply rate is, the higher the crossing point temperature is. Similar to coal, CO also underwent three stages, namely a slow low-temperature oxidation stage, a rapid oxidation stage, and a steady increase stage. However, unlike coal, alkane and alkene gases produced by oil shale underwent four stages. They all had a concentration reduction stage with the maximum drop of 24.20%. Statistical classification of inflection temperature of various gases as their concentrations change showed that the temperature of 140 °C is the key temperature for group reactions, and above the temperature of 140 °C, all alkane and alkene gases underwent the rapid concentration increase stage.

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Influence of pyrolysis condition and transition metal salt on the product yield and characterization via Huadian oil shale pyrolysis

Cited by 64 publications

References 31 publications

Effect of Shale Ash-Based Catalyst on the Pyrolysis of Fushun Oil Shale

Effect of Shale Ash-Based Catalyst on the Pyrolysis of Fushun Oil Shale

Catalytic Effects of Fe- And Ca-Based Additives on Gas Evolution During Pyrolysis of Dachengzi Oil Shale of China

Study on Low Temperature Oxidation Characteristics of Oil Shale Based on Temperature Programmed System

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