Direct conversion of poor‐quality residual oil to light gases in electricity‐driven thermal plasma reactor

Abstract

Nowadays, the utilization of non‐conventional oil resources has become an increasingly attractive solution for producing valuable chemicals and materials due to the depletion of conventional oil resources. Plasma technology, powered by renewable energy sources, provides a potential way to convert low‐grade residual oil into lighter hydrocarbons in an environmentally friendly fashion. This study has developed a laboratory‐scale plasma pyrolysis system to investigate the impacts of residual oil characteristics and operating variables such as residual oil‐specific enthalpy, arc gas flow rate, arc gas composition, quenching, and plasma configuration. The results show that the higher specific enthalpy of the residual oil leads to higher yields of C1, C2, and H2, particularly C2H2. An increment in the arc gas flow rate improves the pyrolysis impact; however, an excessively high arc gas flow rate lowers the thermal plasma jet's temperature, causing a limited pyrolysis effect. In the composition of arc gas, the increasing concentration of H2 can enhance the specific enthalpy and improve carbon conversion from residual oil to gas products, both of which result in a higher yield of light gases. Furthermore, ethane gas has been used as a quenching medium after plasma pyrolysis. The results reveal that ethane can be cracked into ethylene and other products by taking full use of the heat energy of the gas. Meanwhile, the sharp decrease in the gas temperature inhibits the further pyrolysis of the main valuable products.

Non-Thermal Plasma Pyrolysis of Fuel Oil in the Liquid Phase

“…Plasma-chemical pyrolysis makes it possible to produce turquoise hydrogen together with olefins and carbon materials [36][37][38]. Plasma-chemical technologies are also being developed for waste recycling [39][40][41] and for the decomposition of CO 2 [42,43].…”

Preface to the special issue section in memory of John R. Grace

“…This special issue includes 18 papers spanning John's main interests in clean energy, [4][5][6][7][8] fluidization and fluidparticle systems, [9][10][11][12][13][14][15][16][17][18] and chemical engineering perspectives [19][20][21] but cannot fully capture his significance. Listing someone's professional work rarely reveals why they leave a unique hole or why those who had the good fortune to regard them as a colleague feel a strong sense of loss.…”