Effect of demineralization and heating rate on the pyrolysis kinetics of Jordanian oil shales

A TGA/DTA-MS investigation to the influence of process conditions on the pyrolysis of Jimsar oil shale

“…But he suggested that the decomposition of kerogen is a one-step reaction: Kerogen / alkanes (C 1 eC 3 ) gas þ Alkenes (C 2 eC 15 ) gasþliquid . The two-step decomposition mechanism of kerogen is agree with Al-Harahsheh and Al-Ayed [7], Syed and Qudaih [18], Thakur and Nuttall [28] et al Williams and Ahmad [5] identified that the hydrocarbon compounds could react with carbonaceous residues which resulting in coke formation. They also suggested that the oil coking reaction generated carbonaceous products.…”

“…Thus, it's important to illustrate the reactions during the pyrolysis process. According to literature [3,7,18,28] and the evolution traces of different compounds targeted in this work, the products formation during the pyrolysis of Jimsar oil shale mainly contains the following reactions:…”

“…This increased the coke formation reactions inside the particle. But the extent of secondary cracking reactions and polymerizing reactions will both decrease when products diffusing out of the particle, because the internal and external temperatures of particle are lower [5,7]. They also summarized that at higher heating rates, gaseous products are generated faster than they can diffuse out of the particle, which results in the increase of secondary reactions among gaseous products and carbonaceous residues inside the particle [5].…”

“…For example, Williams and Ahmad [4,5] and Al-Harahsheh and Al-Ayed [7] showed that the decomposition were shifted to higher temperatures as the heating rate was increased for the analysis of oil shale using TGA. Williams and Ahmad [5] and Dogan and Uysel [9] investigated the influence of pyrolysis temperature and showed that the weight losses were larger at higher pyrolysis temperatures.…”

Study on the Low-Temperature Oxidation Law in the Co-Mining Face of Coal and Oil Shale in a Goaf—A Case Study in the Liangjia Coal Mine, China

“…Jiang et al studied the influence of hydrothermal pretreatment on the distribution of pyrolysis product and oil characteristics [6]. Mohammad Al-Harahsheh et al investigated the effects of the mineral content in oil shale on pyrolysis [7]. Miao et al measured the volatile components of Daqing oil shale using a thermogravimetric analysis, examined the impact of the temperature rise rate and of the final temperature of pyrolysis characteristic of the oil shale, and found that final temperature of pyrolysis was the most important factor influencing the volatile content: the higher the final temperature of pyrolysis, the higher the volatile content [8].…”