The Catalytic Effect of Modified Bentonite on the Pyrolysis of Oily Sludge

Abstract

To raise the recovery of oil during pyrolysis, reactions were performed on oily sludge using catalysts such as a molecular sieve and an Fe-containing molecular sieve catalyst in a tubular furnace reactor. The catalysts were prepared through hydrothermal method and characterized by various characterization methods. The results of the sample for the test have shown that more time could significantly increase the oil yield. The rate of oil recovery was increased with the increase of the catalytic in the initial phase and decreased at the back of the stage. In addition, higher temperature contributed to higher oil production, and at the same time the optimal ratio of molecular sieve catalytic to sludge was found to be 0.035. Research has revealed that the content of oil recovery rate could reach up to 85.52%. The effects of catalytic on the recovery improve rate of oil in oily sludge samples presented the following decreasing order of the molecular sieve and the Fe-containing molecular sieve.

Keywords:

• oily sludge
• molecular sieve
• bentonite
• modification
• pyrolysis