Light‐Assisted Semi‐Hydrogenation of 1,3‐Butadiene with Water

Abstract

Sustainable processes for semi‐hydrogenation of alkynes/alkadienes impurities in alkenes feedstocks are in great demand in industry as the utilization of excessive hydrogen, high temperature and unsatisfactory alkenes selectivity of the current thermo‐catalytic route, however, their development is still challenging. Herein, we innovate a light‐assisted semi‐hydrogenation process in gas‐feed fixed bed reactor, with water as hydrogen atom source by in situ photocatalysis. Using Pd/TiO2 as model catalyst, this process shows an excellent catalytic performance for the semi‐hydrogenation of 1,3‐butadiene, with 100 % of butenes selectivity at ≈99 % of conversion over 180 h of reaction at ambient temperature driven by 66 mW cm−2 of irradiation intensity. This light‐driven, H2‐free, ambient temperature semi‐hydrogenation process, with superior performance to that of thermocatalytic route, shows attractive to bring an evolution in industrial hydrogenation technology to an economical and safe way.

InNi3C0.5@C-derived InNi3 alloy as a coke-resistant low-temperature catalyst for selective butadiene hydrogenation

“…The selective hydrogenation of 1,3-butadiene (BD) is vital to the purification of alkadienes in the upgrading of C4 species to polymers and other valuable chemicals, in which the content of BD residuals should be strictly controlled, as even a trace amount (>200 ppm) will cause catalyst deactivation in the polymerization units. 1–4 In this context, selective hydrogenation is the most effective approach, and depends on the use of efficient catalysts to hydrogenate only one CC bond of the BD molecule while avoiding over-hydrogenating the other valuable olefins in the C4 stream. To date, precious metals based on Pd, 5–8 Au, 9–11 and Pt (ref.…”

Palladium particle-catalyzed selective butadiene hydrogenation: effect of covalent organic framework modification

“…For instance, 1,3-butadiene (BD) in the C4 streams should be purified to <100 ppm in order to avoid catalyst deactivation in the polymerization process. 11–14 To this end, the selective hydrogenation of BD while avoiding the hydrogenation of other olefins in the streams is the most effective approach. To prevent the loss of feedstocks, the proper selection of a solid catalyst that can hydrogenate only one CC bond of the BD molecules is key.…”

Emerging heterostructured C3N4photocatalysts for photocatalytic environmental pollutant elimination and sterilization

“…Since the pioneering work regarding solar-light-driven water decomposition was reported in 1972, 1 the transformation of solar energy into chemical energy has attracted tremendous attention in environmental remediation and sustainable energy evolution. [2][3][4][5][6] Furthermore, the photocatalysis method has been considered as a feasible means for harvesting light energy in chemical bonds through different photoexcited reactions, like organic pollutant oxidation, CO 2 reduction, H 2 O splitting, H 2 O 2 preparation and valued organics synthesis. [7][8][9][10][11][12][13][14][15] Over recent decades, a considerable number of semiconductors such as metal oxides, metal sulfides, and nitride materials have been exploited as photocatalysts for various photocatalytic reactions.…”