Release behaviors of sulfur-containing pollutants during combustion and gasification of coals by TG-MS

Zhang, Haixia; Xian, Shengxian; Zhu, Zhengwang; Guo, Xuewen

doi:10.1007/s10973-019-09251-z

Cited by 15 publications

(2 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The pyrolysis of pyrite was carried out in a thermo-gravimetric analyzer (Setaram Evo TG-DTA 1750) consisting of a vertical furnace, a gas manometer system for controlling the atmosphere in the reactor, and an electronic balance connected to a computer that records the mass loss. The schematic diagram of the thermo-gravimetric analyzer is similar to that of the previous study. ,− The reacted gas in the thermo-gravimetric analyzer was blown into a quadrupole mass spectrometer (TILON LC-D200, AMETEK LLC, USA) to detect its components according to the molecular weight. The electron ionization voltage, the temperature of the transfer line, and the m / z range of the mass spectrometer are 10–70 eV, 270 °C, and 1–200, respectively.…”

Section: Methodsmentioning

confidence: 99%

Pyrolysis Behavior of Pyrite under a CO–H₂ Atmosphere

et al. 2022

View full text Add to dashboard Cite

The transformation behavior of pyrite (FeS 2 ) in the blast furnace process is critical to control the formation and emission of gaseous sulfides in the top gas of ironmaking but has seldom been explored. In present work, the pyrolysis of pyrite from 200 to 900 °C under a CO–H 2 atmosphere was investigated by thermal-gravimetric and mass spectrometry. The thermodynamic theoretical calculations were carried out to further understand the transformation process. The results show that FeS 2 is almost completely reduced to FeS under various CO–H 2 atmospheres. H 2 S and carbonyl sulfide (COS) are the main gaseous sulfides formed through the pyrolysis reactions of FeS 2 under a CO–H 2 atmosphere. A higher H 2 concentration can reduce the pyrolysis reaction temperature of FeS 2 , which is favorable for the conversion of sulfides to H 2 S, while a higher CO concentration promotes the conversion of sulfides to COS. Besides, the pyrolysis products of FeS 2 by order from the former to latter under a strong reductive atmosphere (CO–H 2 ) with increasing temperature are as follows: COS → S → H 2 S → S 2 → CS 2 .

show abstract

Section: Methodsmentioning

confidence: 99%

Pyrolysis Behavior of Pyrite under a CO–H₂ Atmosphere

et al. 2022

View full text Add to dashboard Cite

show abstract

“…The results showed that the water washing process did not change the combustion reactivity and the sulfur release temperature. Controlling the temperature is helpful in reducing the release of SO 2 in both combustion and gasification [ 264 ].…”

Section: Applications To Sulfurmentioning

confidence: 99%

On-Line Thermally Induced Evolved Gas Analysis: An Update—Part 1: EGA-MS

et al. 2022

View full text Add to dashboard Cite

Advances in on-line thermally induced evolved gas analysis (OLTI-EGA) have been systematically reported by our group to update their applications in several different fields and to provide useful starting references. The importance of an accurate interpretation of the thermally-induced reaction mechanism which involves the formation of gaseous species is necessary to obtain the characterization of the evolved products. In this review, applications of Evolved Gas Analysis (EGA) performed by on-line coupling heating devices to mass spectrometry (EGA-MS), are reported. Reported references clearly demonstrate that the characterization of the nature of volatile products released by a substance subjected to a controlled temperature program allows us to prove a supposed reaction or composition, either under isothermal or under heating conditions. Selected 2019, 2020, and 2021 references are collected and briefly described in this review.

show abstract