Development and Study of Self-Sustained Electrochemical Promotion Catalysts for Hydrocarbon Reforming

Abstract

A series of study on self-sustained electrochemical promotion (SSEP) catalysts are summarized. The SSEP catalyst enables more than 90% conversion and 90% hydrogen sensitivity at temperatures of 450 -650 ºC for methane and n-pentadecane reforming. The conversion and sensitivity is up to two orders of magnitude greater than those over Ni based catalyst and a commercial Pt catalyst at 450-550°C. The kinetic models incorporating LangmuirHinshelwood model and SSEP effect successfully describe the major characteristics of hydrocarbons reforming over the SSEP catalyst. This concept of SSEP catalyst may provide a new route for developing high performance catalysts for hydrocarbons reforming.

Numerical Simulation and Experimental Study on Commercial Diesel Reforming Over an Advanced Pt/Rh Three-Way Catalyst

“…In the previous literature [1,7,11,[40][41][42][43][44], hydrogen or carbon monoxide yield of fuel reforming is defined as follows:…”

“…Simultaneously the corresponding rate equation, as illustrated in study [44], which is used in this study for Equation (2) is given by:…”

“…Grote et al [42] described the optimization of a compact steam reforming based upon a catalytically coated micro heat exchanger for diesel fuel, and the dry reformate gas yield was analyzed. Wang and Huang et a.l [43,44] presented a new self-sustained electrochemical promotion catalyst and conducted a series of partial oxidation reforming tests on n-pentadecane and methane at temperatures of 450-650 • C, respectively. The above-mentioned studies mainly focused on H 2 and CO yield of diesel reforming or surrogate compounds of diesel reforming based on typical precious and non-precious metal catalysts.…”

A CFD model for partial oxidation of methane over self-sustained electrochemical promotion catalyst

“…The experimental results demonstrate that the SSEP catalyst enables a significant electrochemical promotion, resulting in a higher conversion of CH 4 into H 2 and CO at temperature 350 -650 °C similar to a commercial Pt based catalyst under the same operation condition. The CH 4 conversion was 29.4% at 350 °C and reached 100% at above 550 °C and the maximum selectivity of H 2 was on the level of 90% at 450 -650 °C under gas hourly space velocity (GHSV) of 42,000 h -1 [15][16][17]. Hernandez et al [18] studied similar catalysts for NO x storage and reduction (NSR) in diesel engine emission control.…”

“…The constant supply of promoters, O 2-, from cathode phases to the surface of the anode phases shifted the electrochemical potential in the positive direction. A detailed illustration can be found in Refs [15][16][17]44]…”