Sulfur Transfers from Pyrolysis and Gasification of Coal

Zhao, Lei; Chu, Xi Jie; Cheng, Shao Juan

doi:10.4028/www.scientific.net/amr.512-515.2526

Cited by 5 publications

(2 citation statements)

References 7 publications

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“…In Figure 3d, the H 2 emission curve in the range of 800 • C to 1000 • C followed a linear trend and was almost parallel to the time axis. At a given combustion temperature, H 2 emissions were much smaller than those of CO, with differences of one order of magnitude, which was due to H 2 is easier to react with O 2 under the same conditions because of its stronger reducibility than CO [28].…”

Section: Emission Characteristics Of Noxmentioning

confidence: 94%

Emission Characteristics of Pollution Gases from the Combustion of Food Waste

Liu

Hong

2021

Energies

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The emission characteristics of pollution gases produced via the combustion of food waste were studied through a laboratory-scale electrically heated tube furnace. The results showed that the pollution gases generated from the combustion of food waste were CO, H2 and NOx. Each emission curve of CO had a peak. When the combustion temperature rose from 400 °C to 1000 °C, the peak first increased (from 400 °C to 700 °C) and then decreased (from 800 °C to 1000 °C). However, the burnout time shortened with the increase in temperature. Therefore, food waste should be combusted at a higher temperature than 700 °C from the perspective of reducing CO emissions. The emissions of H2 were similar to those of CO. In other words, if CO emissions increased, H2 emissions also increased in the same temperature range. Some NOx emission curves had two peaks (the combustion of cooked rice at 1000 °C; the combustion of vegetable leaves in the temperature range of 600 °C to 1000 °C). The higher the combustion temperature, the higher the second NOx emission peak. NOx emissions from the combustion of cooked rice were greater in the temperature range of 400 °C to 500 °C, whereas for vegetable leaves, that temperature range was from 600 °C to 700 °C. Hence, from the viewpoint of reducing pollution gases, food waste should be combusted at a higher temperature than 700 °C.

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Section: Emission Characteristics Of Noxmentioning

confidence: 94%

Emission Characteristics of Pollution Gases from the Combustion of Food Waste

Liu

Hong

2021

Energies

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“…For instance, inorganic pyrite would be decomposed between 550 and 600 °C, whereas organic thiophenes, prevalent in coke, need a decomposition temperature above 900 °C . Meanwhile, during the devolatilization stage, the organic-S in petroleum coke could react with the hydrogen in fuel or H 2 to generate H 2 S, and during the char gasification stage, the produced H 2 under a steam gasification atmosphere can generate mostly H 2 S. In addition, the sulfur in the remaining char has a greater tendency to transform into COS rather than H 2 S in an atmosphere of CO 2 . , …”

Section: Introductionmentioning

confidence: 99%

Sulfur Evolution and Capture Behavior by a Solid Waste of Red Mud during Chemical Looping Combustion of Petroleum Coke

Zhang

Liu

et al. 2022

Energy Fuels

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The sulfur evolution behavior during the chemical looping combustion (CLC) process of petroleum coke was investigated in a fluidized bed reactor with a low-cost solid waste of red mud as the oxygen carrier. Effects of temperature, oxygen carrier, and potassium catalyst addition on sulfur release were investigated, and H 2 S oxidization kinetics with the red mud and the effect of elements in the red mud on sulfur conversion were evaluated in detail. The red mud oxygen carrier had a promoting effect on H 2 S generation and thus enhanced sulfur conversion. The addition of potassium remarkably accelerated carbon conversion due to its catalytic effect. Meanwhile, it promoted H 2 generation and then enhanced the generation of H 2 S. The addition of potassium into the process could weaken the release of gaseous sulfur but had no obvious negative influence on the reactivity of the red mud oxygen carrier. The experiment H 2 S interaction with the red mud suggested that the conversion of H 2 S to SO 2 decreased with increasing temperature. The red mud has a low ability to oxidize H 2 S to SO 2 but a high reactivity to capture sulfur-containing gases. Solid sulfur-containing products such as CaSO 4 and Fe 3 S 4 as well as K 2 S 2 in the case of K addition into the process were detected.

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Thermodynamic Calculation of the Decomposition of Inorganic Sulphur in Coal in Oxy-Fuel Atmosphere

Guan¹,

2022

Chem Technol Fuels Oils

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Sulfur Transfers from Pyrolysis and Gasification of Coal

Cited by 5 publications

References 7 publications

Emission Characteristics of Pollution Gases from the Combustion of Food Waste

Emission Characteristics of Pollution Gases from the Combustion of Food Waste

Sulfur Evolution and Capture Behavior by a Solid Waste of Red Mud during Chemical Looping Combustion of Petroleum Coke

Thermodynamic Calculation of the Decomposition of Inorganic Sulphur in Coal in Oxy-Fuel Atmosphere

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