The effects of temperature and molten salt on solar pyrolysis of lignite - IMT Mines Albi-Carmaux Accéder directement au contenu
Article Dans Une Revue Energy Année : 2019

The effects of temperature and molten salt on solar pyrolysis of lignite

Résumé

Molten salt pyrolysis driven by concentrated solar radiation is well positioned to utilize solar energy and lignite effectively. This study focused on the effects of temperature (500, 600, 700 and 800 °C) and molten carbonate salt (Li2CO3-Na2CO3-K2CO3) on properties of char obtained from lignite pyrolysis, as well as gas and tar products for revealing their formation mechanism and transformation process. Molten salt pyrolysis of HulunBuir lignite produced more gas products and less char compared to conventional pyrolysis owing to the enhanced heat transfer and catalytic effect of molten salt. The char yield decreased from 58.4% to 43.4%, and the gas yield (especially CO2, H2 and CO) increased from 28.3% to 46.1% at 800 °C. CO2, CO and H2 production increased about 60.43%, 103.42% and 65.2% at 800 °C, respectively. Additionally, the presence of molten salt improved the tar quality with more hydrocarbon content (maximum increase of 5.8%) and less oxygenated compounds. The structure and reactivity relationship of char was characterized by XRD, BET, SEM, FTIR, Raman spectroscopy and TGA. Molten salt generated char had a higher reactivity due to the increase of disorder, surface area, microporosity (maximum of 71.74%) and active sites.
Fichier principal
Vignette du fichier
the-effects-of-temperature-and-molten-salt.pdf (3.48 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-02149242 , version 1 (11-06-2019)

Identifiants

Citer

Xiao He, Kuo Zeng, Yingpu Xie, Gilles Flamant, Haiping Yang, et al.. The effects of temperature and molten salt on solar pyrolysis of lignite. Energy, 2019, 181, pp.407-416. ⟨10.1016/j.energy.2019.05.181⟩. ⟨hal-02149242⟩
119 Consultations
590 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More