3 years ago

Experimental study on the coal tar hydrocracking process over different catalysts

Magdalena Majka, Grzegorz Tomaszewicz, Andrzej Mianowski

Publication date: December 2018

Source: Journal of the Energy Institute, Volume 91, Issue 6

Author(s): Magdalena Majka, Grzegorz Tomaszewicz, Andrzej Mianowski

Abstract

In the paper, the results of the study on a laboratory process of hydrocracking of coal tar are presented. High-temperature coal tar was hydrocracked in an autoclave reactor, at 400–413 °C and 7,3–9,6 MPa over 5 different, hydrocracking catalysts to study the yields and characteristics of the products. Liquid products were obtained with a yield of 88–92 wt.% and gas products with a yield of 12–8 wt.%. After dehydration by azeotropic distillation, liquid products were separated on the oil fraction boiling below 360 °C, and pitch fractions boiling above this temperature. In the balance of distillation, it is clear that only the cracking activity of NiW/Al2O3 and Y zeolite catalysts is so high that the raw material containing 5 vol.% fraction boiling below 200 °C provides a product comprising approx. 12,5 vol.% of this fraction. The influence of five different catalysts on the yield of 18 poly aromatic hydrocarbons (PAHs) in the hydrocracking products have been investigated by GC/MS. The results indicate that NiW/Al2O3 and Y zeolite catalysts have the highest catalytic activity for light aromatic formation (the highest yield of fraction boiling below 200 °C) and aromatic condensed aromatic cracking (PAHs). After the hydrocracking NiW/Al2O3 catalyst, the total yields of PAHs decrease 52.7% as that of raw coal tar.

You might also like
Discover & Discuss Important Research

Keeping up-to-date with research can feel impossible, with papers being published faster than you'll ever be able to read them. That's where Researcher comes in: we're simplifying discovery and making important discussions happen. With over 19,000 sources, including peer-reviewed journals, preprints, blogs, universities, podcasts and Live events across 10 research areas, you'll never miss what's important to you. It's like social media, but better. Oh, and we should mention - it's free.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.