Support effect in Co3O4-based catalysts for selective partial oxidation of glycerol to lactic acid

Combined dehydrogenation of glycerol with catalytic transfer hydrogenation of H2 acceptors to chemicals: Opportunities and challenges

“…Selective oxidation of glycerol has been demonstrated to be thermodynamically more favorable for C–H bond activation under mild reaction conditions (e.g., lower operating temperature and alkali concentration), which greatly reduces energy consumption ( Shen et al, 2010 ; Lakshmanan et al, 2013 ; Tao et al, 2017 ; Evans et al, 2020 ; Tao et al, 2020 ; Torres et al, 2021 ). Furthermore, low reaction temperature can also significantly inhibit C–C bond cleavage by alkalis, thus good selectivity of C 3 products.…”

“…Furthermore, low reaction temperature can also significantly inhibit C–C bond cleavage by alkalis, thus good selectivity of C 3 products. Selective oxidation of glycerol to LA is generally carried out with the promotion of various noble metal and some non-noble metal catalysts (e.g., Au, Pt, Pd, and polyoxometalate ) ( Shen et al, 2010 ; Lakshmanan et al, 2013 ; Xu et al, 2013 ; Cho et al, 2014 ; Purushothaman et al, 2014 ; Zhang et al, 2016a ; Zhang et al, 2016b ; Arcanjo et al, 2017 ; Tao et al, 2017 ; Zhang et al, 2017 ; Douthwaite et al, 2020 ; Evans et al, 2020 ; Tao et al, 2020 ; Torres et al, 2021 ; Wang et al, 2021 ). In the first important advances, Shen et al (2010) reported that the bimetallic Au–Pt catalysts exhibit excellent performances with a high yield of 86% in the presence of alkali and O 2 at 90°C.…”

A Perspective on Heterogeneous Catalysts for the Selective Oxidation of Alcohols

“…Overall, several reactions are involved in the oxidation of alcohols including dehydrogenation, oxidative dehydrogenation, dehydration, and total oxidation, among which the first two are giving rise to the desired oxygenated products. [64] In order to promote the desired paths, one should consider not only redox properties of oxides but also their acid/base properties[ 60b , 80 ] as in some cases, they might even simultaneously contribute to the mechanism. [81] Therefore, it is highly desired to have tools to identify the nature of the active sites in oxide‐based catalysts.…”

Cleaner one-pot transformation of glycerol to acrylic acid and 1,2-propanediol over bifunctional Cu2O/montmorillonite catalysts without external oxygen and hydrogen

“…2 As of 2017, the annual global production of biodiesel was 36.1 billion liters (IEA, 2019). 3 As one of the sustainable platform chemicals 4 and a reactive molecule, 5 glycerol provides opportunities to produce many high value-added products, such as lactic acid, [6][7][8] acrolein, [9][10][11][12] hydroxyacetone, 13 1,3-propanediol, 14 1,2-propanediol, 15 1,3-dichloro-2-propanol, 16 acrylic acid, [17][18][19] 3-chloro-1,2-propanediol, 20 etc. [21][22][23] Among them, the global market has a tremendous demand for acrylic acid (AA) with 4.5 million metric tons 24 and 1,2-propanediol (1,2-PDO) with 1.4 million tons annually, 25 as they are fundamental monomers for producing resin, plastics, paints, etc.…”