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Preparation of hydrogen-rich gas by heavy tar cracking with pyrolysis coke catalyst modified by plasma

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In this paper, two pyrolysis furnace reactors were used, and pyrolysis tar was cracked by different types of pyrolysis coke and Mn-supported pyrolysis coke catalysts. The effect of pyrolysis coke prepared at different temperatures on the catalytic cracking of coal tar was studied. The optimum pyrolysis coke was used as the carrier, and the catalyst was prepared by low-temperature plasma. The effect of the catalyst on the catalytic cracking of tar was discussed. The composition of the pyrolysis gas was analyzed by gas chromatography, and the catalysts were characterized by XRD, BET, and SEM. The results showed that: 1) pyrolysis coke prepared at different temperatures could reduce tar yield and increase gas content, and the catalytic cracking effect of pyrolysis coke prepared at 500°C was obvious; 2) the catalyst prepared by plasma modification and roasting had the best effect on tar cracking, and hydrogen production increased by 1.07 times.
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Keywords: Catalyst; combustible gas; plasma; pyrolysis coke; tar cracking

Document Type: Research Article

Affiliations: 1: School of Geology and Environment, Xi’an University of Science and Technology, Xi’an, China 2: Environmental Protection & Energy-Saving Equipment Research institute, China National Heavy Machinery Research Institute co, Ltd, Xi’an, China

Publication date: August 3, 2017

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