Autothermal chemical looping reforming process of different fossil liquid fuels

Abstract

The autothermal Chemical-Looping Reforming (a-CLR) is a process where syngas is produced with two main advantages; there are captured CO 2 emissions and the heat required for the syngas production is generated by the process itself. A Ni-based material is used as oxygen carrier circulating between two fluidized bed reactors: the fuel and air reactors. In this work, the auto-thermal conditions in a global H 2 production process, integrated by the a-CLR process and a Water Gas Shift reactor, using different liquid fossil fuels were theoretically determined. The hydrogen production per mol of carbon in the fuel was similar for all fossil fuels, taking a value of 2.2 at the optimal operating temperature (700 C). In addition, the possibility of working at low temperature for a maximum H 2 production was experimentally demonstrated in a continuous 1 kW th a-CLR unit.

Hydrogen production from bio-oil: A thermodynamic analysis of sorption-enhanced chemical looping steam reforming

“…The release of heat from fuel oxidation reduces energy demand, so that the reformer may be autothermal, and no longer requires indirect heating from a furnace. The OTM provides oxygen in an undiluted form, thereby eliminating the need for costly air separation [18]. SE-CLSR combines sorption enhancement with the chemical looping principle, bringing about added benefits through combination of equilibrium shift, steam reforming and OTM reduction.…”

“…In chemical looping steam reforming (CLSR), an oxygen transfer material (OTM) provides an undiluted source of oxygen for partial oxidation of the fuel, thereby enabling an autothermal reforming process without costly air separation [18]. It is closely related to other chemical looping processes proposed for hydrogen production, such as steam reforming with chemical looping combustion (SR-CLC), or chemical looping water splitting [19][20][21][22][23].…”

Numerical Simulation and Experimental Investigation of Diesel Fuel Reforming over a Pt/CeO2-Al2O3 Catalyst

“…Commercial diesel fuel is mainly composed of high-molecular-weight hydrocarbons, with carbon numbers ranging from approximately C 7 to C 20 [13,14]. Due to the complicated properties of diesel fuel and the cost of numerical simulations to deal with numerous components in modelling and the subsequent chemical reaction processes of diesel fuel reforming, most previous studies model the problems by representing diesel with a primary reference fuel, i.e., n-heptane and iso-octane, as an approximation [15][16][17][18].…”

Process Analysis for the Production of Hydrogen and Liquid Fuels from Oil Shale

“…Shale oil contains a considerable amount of sulfur, nitrogen, and metals such as nickel and vanadium, which are heteroatoms that cause many problems, including instability of fuel in transportation or storage . To cope with the instability challenge of shale oil and to produce more useful light HVHFs, hydrogenation or hydrocracking are favorable methods to apply . For the hydrogenation of shale oil, hydrogen is required and the outsourcing of hydrogen is also a challenge faced by the oil shale upgrading process …”

“…[20,21] To cope with the instability challengeo fs hale oil and to produce more useful light HVHFs,h ydrogenation or hydrocracking are favorable methods to apply. [6,22,23] Fort he hydrogenationo fs hale oil, hydrogen is required and the outsourcing of hydrogen is also achallenge faced by the oil shale upgrading process. [24] Alternative conversion systems are being developed to enable at ransition to ac lean-energy world.…”