Developing efficient gasification technology for high-sulfur petroleum coke to hydrogen-rich syngas production

Ba, Zhongren; Zhao, Jing‐Tai; Li, Chunyv; Huang, Jiejie; Fang, Yitian; Zhang, Linxian; Kong, Lingqian; Wang, Qiufeng

doi:10.1016/j.fuel.2020.117170

Cited by 44 publications

(13 citation statements)

References 26 publications

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“…Coaxial jets, consisting of an inner round jet surrounded by a concentric outer jet (see Fig. 1a), are widely utilized in the field of energy conversion as an effective method to mix fuel and oxidant streams, e.g., pulverized coal gasification and combustion devices, turbofan and rocket engines [1][2][3]. To achieve the optimal mixing properties of coaxial jets, there is a cross angle or contraction angle (the angle between the inner/outer channel with the axis, see Figs.…”

Section: Introductionmentioning

confidence: 99%

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Evolution and Dynamics of the Coherent Vortices in Contraction and Premix Coaxial Jets

Hao

et al. 2022

Chem Eng & Technol

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Contraction and premix coaxial jets are commonly employed in gasification and combustion systems. Understanding the spatial development of coherent structures is a prerequisite to improve the mixing and stability characteristics. The evolution and dynamics of coherent vortices under the contraction and premix coaxial jets are visualized and discussed using flow visualization technology. The contraction configuration increases the instability of the outer shear layer corresponding to an organized rolling up of the outer vortex rings. In the premixed configuration, the earlier interaction between the inner and outer shear layers induces the precocious development of the inner Kelvin-Helmholtz (K-H) vortices. Two empirical equations are proposed to predict the transition length towards a fully turbulent flow.

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Section: Introductionmentioning

confidence: 99%

“…The crucial parameter dominating the evolution and dynamics of coherent vortices is the outer-to-inner velocity ratio r u 1) . Using flow visualization, Dahm et al [13] investigated the vortex structures and their dynamics in the near region of coaxial jets.…”

Section: Introductionmentioning

confidence: 99%

Evolution and Dynamics of the Coherent Vortices in Contraction and Premix Coaxial Jets

Hao

et al. 2022

Chem Eng & Technol

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“…Coal gasification technology is a clean and efficient thermochemical technology, which is widely used in the production of chemical raw materials 3 . There are many advantages of gasification over traditional combustion, such as less pollutant emissions and higher thermal efficiency 4 . Generally, fixed‐bed, fluidized‐bed, and entrained‐flow gasifiers are the three most commonly applied ones in industry 5 .…”

Section: Introductionmentioning

confidence: 99%

“…3 There are many advantages of gasification over traditional combustion, such as less pollutant emissions and higher thermal efficiency. 4 Generally, fixed-bed, fluidized-bed, and entrained-flow gasifiers are the three most commonly applied ones in industry. 5 As traditional gasification equipment, fixed-bed gasifiers are used in many countries and areas due to simplicity of operation and flexible feedstock, 6 and emerging entrained-flow gasifiers are often used in processes such as integrated gasification combined cycle because of their high carbon conversion and cold gas efficiency.…”

Section: Introductionmentioning

confidence: 99%

Study on CO₂ gasification properties of coal gasification wastewater slurry

Liu

Wang

et al. 2021

Asia-Pacific J Chem Eng

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Coal water slurry technology and gasification technology are used to simultaneously treat wastewater and CO2; coal water slurry is prepared from fixed‐bed coal gasification wastewater; and then, thermogravimetric analysis, Fourier‐transform infrared spectrometry, scanning electron microscopy, energy‐dispersive spectrometry, and X‐ray diffraction are used to analyze the characteristic parameters of CO2 gasification and the products that formed. The results reveal the following: (a) compared with coal water slurry, coal gasification wastewater slurry shows decreases in the gasification start temperature, gasification weight loss peak temperature, and gasification end temperature of 12°C, 22°C, and 17°C, respectively, and shows increases in the maximum and average reaction rates. In addition, the reactivity index for coal gasification wastewater slurry is found to be 14.29% higher than that for ordinary coal water slurry. (b) Coal gasification wastewater slurry produces more methane and other aliphatic hydrocarbon gases in the pyrolysis stage and more CO in the coke gasification stage than coal water slurry. (c) Coal gasification wastewater slurry contains many small particles and flocs on the surface of the coal and a high Na content (up to 8.07%) in the microarea. In addition, a richer pore structure exists on the surface of the gasification residue of the coal gasification wastewater slurry. (d) The components of the gasification residue for coal gasification wastewater slurry show relatively larger changes. Moreover, the catalytic effect of alkali metal may be weakened due to the reaction of the minerals in the coal to form a complex.

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“…Although coke has a high carbon content, the high sulfur content hinders its use in many fields, such as a fuel, anode, and electrode . Nowadays, the production yield of high-sulfur petroleum coke is increasing rapidly with the growing demand for petroleum and quality upgrading for crude oil. , There has been a considerable push to find a suitable application for this valuable resource. Many studies have shown that sulfur-impregnated adsorbents exhibit an outstanding performance for Hg 0 capture. ,,,, However, the inherent sulfur in petroleum coke mainly exists in the form of thiophene, which is matrix bound .…”

Section: Introductionmentioning

confidence: 99%

Impact of Nonoxidized Sulfur Species on Elemental Mercury Removal by SO₂ Activated Petroleum Cokes

et al. 2020

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High-sulfur petroleum coke is potentially one of the most promising materials for developing efficient and low-cost sorbents for Hg0 removal from flue gas. In this study, three distinct SO2-activated high-sulfur petroleum cokes were prepared at 650–850 °C via different sulfurization protocols, including SO2-impregnated petroleum coke (PC-S), SO2-impregnated coke produced with an additional reductive heat-treatment process in N2 (PC-NS), and SO2-impregnated coke prepared with the presence of SO2 in the gas during the cooling process (PC-SC). The SO2-activated cokes were characterized with nitrogen adsorption/desorption measurements, X-ray photoelectron spectroscopy, thermogravimetric analysis, and their mercury removal performances were investigated in a fixed-bed reactor at 80–200 °C with an initial mercury concentration of 35–120 μg/m3. To explore the influence of nonoxidized sulfur species on Hg0 removal, particular focus was given to the comparison of the reduced sulfur, sulfide sulfur, and elemental sulfur formed during different sulfurization processes, as well as the consequent differences in Hg0 adsorption characteristics. It found that the sulfur incorporated into the carbon matrix of PC-S by interaction with SO2 at 650 °C was dominantly organic sulfide. Thermal treatment in N2 at 800 °C led to an addition of reduced sulfur in PC-NS. An increment of 0.74 at. % elemental sulfur was observed in PC-SC after exposure to SO2 during the cooling step. The Hg0 adsorption capacity of PC-SC at low temperatures was significantly enhanced, yielding a mercury capacity of 622 μg/g at 80 °C. However, elemental sulfur suffered from severe temperature sensitivity for mercury binding. The sample PC-NS which contained more reduced sulfur showed the highest Hg0 adsorption capacity at elevated temperatures above 160 °C. Furthermore, the increment in inlet mercury concentration would lead to higher adsorption capacities and faster adsorption rates. According to the R L obtained from Langmuir isotherms, the Hg0 adsorption reactivity can be arranged as follows: PC-NS > PC-S > PC-SC. The mercury temperature-programmed desorption results suggested that sulfur species not only had an effect on Hg0 adsorption capacity but also played an essential role in the thermal stability of the adsorbed mercury compounds. Mercury was principally associated with elemental sulfur in the form of metacinnabar and combined with thermal-stable organic sulfide in cinnabar or organomercuric compounds Hg–SR.

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Developing efficient gasification technology for high-sulfur petroleum coke to hydrogen-rich syngas production

Cited by 44 publications

References 26 publications

Evolution and Dynamics of the Coherent Vortices in Contraction and Premix Coaxial Jets

Evolution and Dynamics of the Coherent Vortices in Contraction and Premix Coaxial Jets

Study on CO₂ gasification properties of coal gasification wastewater slurry

Impact of Nonoxidized Sulfur Species on Elemental Mercury Removal by SO₂ Activated Petroleum Cokes

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Developing efficient gasification technology for high-sulfur petroleum coke to hydrogen-rich syngas production

Cited by 44 publications

References 26 publications

Evolution and Dynamics of the Coherent Vortices in Contraction and Premix Coaxial Jets

Evolution and Dynamics of the Coherent Vortices in Contraction and Premix Coaxial Jets

Study on CO2 gasification properties of coal gasification wastewater slurry

Impact of Nonoxidized Sulfur Species on Elemental Mercury Removal by SO2 Activated Petroleum Cokes

Contact Info

Product

Resources

About

Study on CO₂ gasification properties of coal gasification wastewater slurry

Impact of Nonoxidized Sulfur Species on Elemental Mercury Removal by SO₂ Activated Petroleum Cokes