A study of mesophase formation from a low temperature coal tar pitch using formaldehyde as a promoter for polymerisation

Crespo, José L.; Arenillas, A.; Viña, José Antonio Fernández; Garcı́a, Roberto; Snape, Colin E.; Moinelo, Sabino R.

doi:10.1016/j.carbon.2004.05.032

Cited by 10 publications

(6 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Medium–low temperature coal tar pitch (MLP) is a type of large‐scale by‐product obtained during the production of semi‐coke and deep‐processing of low‐rank coal, respectively . MLP is usually used as the raw material for the production of liquefied oil, road asphalt, mesophase pitch, and other artificial carbon materials . The researchers believe that with the deep understanding of the physico‐chemical properties of MLP, it is a significantly important precursor to produce fine mosaic coke .…”

Section: Introductionmentioning

confidence: 99%

Thermal Conversion Behavior of Medium–Low–Temperature Coal Tar Pitch During Liquid–Phase Carbonization Process

Zhu

Zhao

et al. 2019

ChemistrySelect

View full text Add to dashboard Cite

Medium–low temperature coal tar pitch (MLP) is a type of aromatic carbonaceous material obtained by the low temperature distillation of low rank coal, and is considered as a desirable raw material for the production of artificial carbon/graphite material. The thermal conversion behaviors of MLP during the liquid‐phase carbonization process were analyzed in detail in this study. Further, the changes of molecular structure and carbon microcrystalline structure of MLP and liquid‐phase carbonization products derived from it were quantitatively investigated by optical microscopy, fourier transform infrared spectroscopy, Raman spectroscopy, X‐ray diffraction, and curve‐fitting method. Results showed that both branched chain and the contents of C=O functional groups in the MLP played a key role in the reaction reactivity. Moreover, temperature of 450 °C was found to be a rapid changing temperature point on the enhancement of thermal conversion of MLP. The stacking height (Lc), parallel layers (N), average number of aromatic rings in each layer (n), ratio of ‘impurity’ structure (RI), ratio of amorphous carbon structure (RAC), ratio of graphite carbon structure (RGC), and ratio of defects graphite carbon structure (RDGC) exhibited a significant change with the improvement of liquid‐phase carbonization temperature.

show abstract

Section: Introductionmentioning

confidence: 99%

Thermal Conversion Behavior of Medium–Low–Temperature Coal Tar Pitch During Liquid–Phase Carbonization Process

Zhu

Zhao

et al. 2019

ChemistrySelect

View full text Add to dashboard Cite

show abstract

“…In order to improve the qualities of pitch to simplify the production process and reduce the byproducts, researchers have been trying to modify pitch using chemical blending [8][9][10][11] and polymerization reaction [12][13][14]. In particular, phenolic compounds account for about one-third in LTCT in accordance with the available data now [15,16].…”

Section: Introductionmentioning

confidence: 91%

Gradient separation of ⩾300°C distillate from low-temperature coal tar based on formaldehyde reactions

Sun

et al. 2015

Fuel

View full text Add to dashboard Cite

“…The unique physicochemical properties of medium–low‐temperature coal tar pitch (MLP) make it an interesting material in many research fields 3 . It has been used as a feedstock for the production of added‐value materials such as liquid fuels, 4,5 mesophase pitch, 6 needle coke, 7 fine mosaic coke, 8 and activated carbon 9–13 …”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of mesophase coke from medium–low‐temperature coal tar pitch modified by high‐pressure thermal polymerization

Bai

Zhu

et al. 2021

Asia-Pacific J Chem Eng

View full text Add to dashboard Cite

Medium–low‐temperature coal tar pitch (MLP) is a by‐product of semi‐coke fabrication with a high content of carbon. However, the small amount of aromatic organic compounds in MLP makes prevents its practical use as a feedstock for the production of high‐quality artificial carbon materials (such as needle coke) via direct thermal conversion. To understand the effects of autogenous pressure thermal polymerization (APTP) on the microstructure of mesophase coke, we performed APTP at different reaction temperatures to produce MLP, which was further utilized as a starting material for the synthesis of mesophase coke. The microstructure of mesophase coke was studied by optical microscopy, X‐ray diffraction, Raman spectroscopy, and scanning electron microscopy. Moreover, the micro‐strength of the mesophase coke was examined. We concluded that the APTP treatment of MLP before direct carbonization of a liquid is an excellent method for the production of high‐quality mesophase coke.

show abstract

A study of mesophase formation from a low temperature coal tar pitch using formaldehyde as a promoter for polymerisation

Cited by 10 publications

References 10 publications

Thermal Conversion Behavior of Medium–Low–Temperature Coal Tar Pitch During Liquid–Phase Carbonization Process

Thermal Conversion Behavior of Medium–Low–Temperature Coal Tar Pitch During Liquid–Phase Carbonization Process

Gradient separation of ⩾300°C distillate from low-temperature coal tar based on formaldehyde reactions

Synthesis and characterization of mesophase coke from medium–low‐temperature coal tar pitch modified by high‐pressure thermal polymerization

Contact Info

Product

Resources

About