Effect of nano-metal oxides types on oil sludge during microwave pyrolysis

Abstract

In this paper, based on the analysis of oil sludge composition and environmental hazards, the microwave catalytic pyrolysis of oil sludge for recovering combustible gas and chain hydrocarbon light oil disposal process, is proposed to perform the recycling of oil sludge and reduce the risk of environmental pollution. In order to improve the yield of combustible gas and light oil in oil sludge pyrolysis, the impact of adding four catalysts (nano-CuO, nano-NiO, nano-MgO, and nano-γ-Al 2 O 3 ) on the heating characteristics of oil sludge and the composition and quality of products during microwave pyrolysis, were experimentally studied and analyzed. The results show that the catalyst can increase the heating rate of sludge and the yield of pyrolysis oil and gas. The increasing order of heating is: nano-CuO > nano-γ-Al 2 O 3 > nano-MgO > nano-NiO > blank group. Compared with the blank group, the content of combustible gas (H 2 + CH 4 + CO) increases by 18.824wt% (MgO), 4.511wt% (CuO), 9.28wt% (NiO), and 16.164wt% (γ-Al 2 O 3 ), respectively. It can be deduced that nanometal oxide catalysts, especially γ-Al 2 O 3 , can promote the decomposition of oil sludge, improve the content of low carbon straight chain hydrocarbons and alcohols, and improve the quality of pyrolysis oil products.

The impact of nano-additives on the properties of sludge microwave pyrolysis products

“…Nano-metal oxides offer a promising avenue as catalysts that are not only readily accessible but also highly efficient. They play a crucial role in diminishing the energy outlay, curtailing time demands, and trimming expenses linked with microwave pyrolysis [16,17]. Against this backdrop, this study embarks on an exploration of the influence wielded by nano-CuO and nano-γ-Al 2 O 3 additives.…”