Abstract
A highly dispersed nickel phosphide catalyst supported on SBA-15 was prepared and tested for the hydrotreating of tire pyrolysis oil (TPO). Physicochemical properties of the prepared catalyst were analyzed by CO uptake chemisorption, BET, TEM, and X-ray diffraction (XRD). An advanced technique with gas chromatography equipped with mass spectrometry and atomic emission detector was applied to investigate carbon-, sulfur-, and nitrogen-containing compounds in TPO. Hydrotreating tests were carried out in a fixed-bed continuous flow reactor at 350 °C, 3.0 MPa, and LHSV of 0.5 h−1. The Ni2P/SBA-15 exhibited an HDS conversion of 89.3% and an HDN conversion of 60.7%, which was comparable to the performance of a commercial NiMoS catalyst under the same conditions.
Highlights
Catalysts 2021, 11, 1272. https://Global waste generation has grown steadily around the world, with 2 billion tons of municipal solid waste produced annually [1]
Among the chemical recycling processes of waste tires, pyrolysis gives a high yield of oil, up to 38%, at moderate temperatures of around 500 ◦ C [4,5]
The tire pyrolysis oil (TPO) has been regarded as a sustainable energy resource owing to a large amount of aromatics, olefins, and other substances, which can be used as valuable chemicals [6,7,8]
Summary
Global waste generation has grown steadily around the world, with 2 billion tons of municipal solid waste produced annually [1]. Among the chemical recycling processes of waste tires, pyrolysis gives a high yield of oil, up to 38%, at moderate temperatures of around 500 ◦ C [4,5]. TPO cannot be directly used as a fuel due to the high content of sulfur and nitrogen compounds derived from the synthesis processes of rubbers [3,8,9,10]. Numerous studies of transition metal phosphide catalysts have been considered as a potential candidate, showing high stability and resistance to aromatics and nitrogen-containing species [14,15,16,17]. Metal phosphide catalysts have not yet been applied to the hydrotreating of TPO. An advanced technique was as a potential catalyst for hydrotreating TPO. An advanced technique was applied to investigate the carbon-, sulfur-, and nitrogen-containing compounds in TPO applied to investigate the carbon-, sulfur-, and nitrogen-containing compounds in TPO and HYD products
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