SELECTION OF OPTIMAL CONDITIONS FOR HYDROTREATING OF PYROLYSIS DISTILLATE AND STUDY OF CATALYST EFFECT

Abstract

This paper discusses the process of hydrotreating pyrolysis distillate.
The study looked at the chemical makeup and physical properties of the
pyrolysis distillate, along with the features of the AKM and ANM catalysts. The
optimal process parameters for hydrotreating were identi�ied and discussed.
As a result of the study, the following optimal conditions for pyrolysis distillate
hydrotreating were determined: temperature – 400–420°C, hydrogen pressure –
4 MPa, consumption of hydrogen-containing gas – 200 nm³/m³ of feedstock, with a
hydrogen volume fraction of 80%. Elemental analysis of the obtained hydrotreated
product was conducted. The shape and makeup of the AKM and ANM catalysts were
examined using scanning electron microscopy (SEM). According to the results, the
AKM catalyst contains 23.07% Al, 2.2% Co, and 6.25% Mo, while the ANM catalyst
contains 31.5% Al, 6.97% Mo, and 3.81% Ni. The effectiveness of the AKM and
ANM catalysts was compared, and the AKM catalyst was found to work better: the
nitrogen level dropped from 7.4 wt.% to 3.71 wt.%, and the sulfur level fell from
9.24 wt.% to 1.8 wt.%. As a result of hydrotreated product distillation, 58% of the
light fraction boiling in the range of 35–130°C was obtained.