Low-temperature methanol steam reforming kinetics over a novel CuZrDyAl catalyst

Abstract

A kinetic study within the low-temperature methanol steam reforming (MSR) reaction range (170 ºC -200 ºC) was performed over a novel CuZrDyAl catalyst. The physicochemical and catalytic properties of the CuZrDyAl catalyst were compared with those of a conventional CuO/ZnO/Al 2 O 3 (G66 MR, Süd-Chemie) sample, taken as reference. The in-house catalyst displays better performances, in terms of methanol conversion and H 2 production, than the reference G66 MR sample.Interestingly, the in-house catalyst is significantly more selective (namely, yielding lower CO concentration) than the commercial one, which gives extra interest for producing fuel cell grade hydrogen. Physicochemical characterization evidences that the in-house catalyst have improved reducibility of copper species compared with the G66-MR, which might account for its better performances.The parameters of a simple power-law equation and two mechanistic kinetic models were determined by non-linear regression, minimizing the sum of the residual squares; the best fitting with the experimental data was obtained when using Model 3, based on the reported work from Peppley et al. [10] for the commercial CuO/ZnO/Al 2 O 3 .This article was published in Reaction Kinetics, Mechanisms and Catalysis, 115(1), 321-339, 2015 http://dx.doi.org/10.1007/s11144-015-0846-z 03-11-2017 2 Noteworthy, is the scarce number of MSR kinetic studies at such lower temperature range.

Intercalation of Copper Phthalocyanine Within Bulk Graphite as a New Strategy Toward the Synthesis of CuO-Based CO Oxidation Catalysts

“…The thin, well-defined peaks indicate high crystallinity of the copper oxide phase, in agreement with XRD results (section XRD) (Michel et al, 2019). Finally, the position of the low temperature reduction peak occurs at lower temperature than that usually found for bulk CuO (280 • C, Silva et al, 2015). It is attributed to the reducing character of the carbonaceous support which could facilitate the reduction of the supported cupric oxide.…”

“…The TPR profile of 7.8%CuPc/graphite[50%/5 min/400] (entry 15) further shows that CuO is the only copper phase present in the composite ( Figure 4 ). The reduction profile indeed exhibits 2 main peaks at 228 and 315°C, which can be attributed to the reduction of CuO into Cu 2 O and to the reduction of Cu 2 O into Cu, respectively (Song et al, 2013 ; Silva et al, 2015 ; Ma et al, 2018 ). Both peaks exhibit similar intensities.…”

Density Functional Theory Based Micro- and Macro-Kinetic Studies of Ni-Catalyzed Methanol Steam Reforming

“…Cu is the most commonly used commercial catalyst for the methanol steam reforming (MSR), CH 3 OH + H 2 O CO 2 + 3H 2 . However, Cu-catalyst suffers from some serious drawbacks such as pyrophoricity and catalyst sintering [5][6][7]. To overcome the drawbacks of Cu catalyst, numerous alternative materials have been examined, including noble metal catalysts [8][9][10], Ni-Cu alloy-based catalysts [11][12][13], and Ni-based catalysts [7,[14][15][16].…”

Combined steam and dry reforming of methanol over Fe‐Mn‐Cu / ZrO 2 catalyst to syngas formation: Study about kinetic and fuzzy model approaches

“…However, there are great discussions over the mechanism of SRM reaction in the literature. [26][27][28][29][30][31][32][33][34][35][36] A detailed mechanism for SRM reaction was introduced by Peppley et al 32 In this mechanism, SRM reaction was followed by MD and WGS reactions over Cu-based catalyst and was based on Langmuir-Hinshelwood (LH) method on the two types of active sites. 32 The active site for MD reaction was distinct compared to WGS and SRM reactions, and dehydrogenation of the adsorbed methoxy group was assumed as the rate-determining step (RDS) for SRM reaction.…”