Pilot-plant study of upgrading of medium and low-temperature coal tar to clean liquid fuels

Hydroprocessing of low-temperature coal tar to produce jet fuel

“…52 Among them, the content of nitrogen was 100.93 mg g À1 at 340 C, and then decreased to 78.96 mg g À1 at 400 C. In contrast, the content of sulfur was 50.31 mg g À1 at 320 C and 34.29 mg g À1 at 400 C. By comparison, it was found that the sulfur was more reactive than nitrogen and the sulfur was relatively easier to be removed from the coal tar, which was consistent with previous studies. 9,11,53 The mechanism of the desulfurization and the denitrication was different. The hydrodenitrogenation reaction was generally divided into two steps: rstly, the saturation reaction of aromatic rings was carried out, and then the C-N fracture was carried out in the second steps, while the hydrodesulfurization reaction could directly carry out the C-S bond fracture reaction.…”

“…At present, the technology for hydrotreating LTCT to produce clean liquid fuels has achieved an enormous breakthrough, 1,[9][10][11][12][13] which also provides some technical support for the preparation of higher value-added oil products. With the rapid development of the aviation industry, the demand for jet fuel is increasing.…”

“…As an alternative to petroleum, coal tar is considered an ideal raw material for the preparation of clean fuels. 9 On the one hand, it can solve the environmental problems, on the other hand, it can also improve the added value of coal resources by catalytic hydrogenation.…”

Co-production of Naphthenic Oil and Phenolic Compounds from Medium- and Low-Temperature Coal Tar

“…8,9 The study on HDS of whole fraction low-temperature coal tar indicates that the nature and activity of sulfur compounds presenting in low-temperature coal tar are similar to those presenting in crude oil heavy components. 10 Wang et al 11 reported that the reaction parameters and feed nitrogen could strongly influence the ability of catalysts (NiMo/Al 2 O 3 and NiW/USY). Similarly, Niu et al 12 examined the effects of process conditions chiefly on the product properties.…”

“…The primary aim of coal tar hydrogenation is to accomplish hydrodesulfurization (HDS), hydrodenitrogenation (HDN), and hydrodeoxygenation (HDO) owing to the higher concentration of S, N, and O in the raw materials. , The study on HDS of whole fraction low-temperature coal tar indicates that the nature and activity of sulfur compounds presenting in low-temperature coal tar are similar to those presenting in crude oil heavy components . Wang et al reported that the reaction parameters and feed nitrogen could strongly influence the ability of catalysts (NiMo/Al 2 O 3 and NiW/USY). Similarly, Niu et al examined the effects of process conditions chiefly on the product properties.…”