Wastewater treatment via hydro-de-heteroatoms using hydrogen donors

Recent progress of heterogeneous catalysts for transfer hydrogenation under the background of carbon neutrality

“…Hydrogenation is one of the most critical and fundamental processes in the modern chemical industry, and can produce important chemical and pharmaceutical intermediates. [18][19][20][21][22][23] However, the use of high pressure hydrogen inevitably leads to some disadvantages such as safety, storage and transportation, and the selectivity of the desired product is difficult to control. [24][25][26][27] In this respect, the catalytic transfer hydrogenation using organic hydrogen donors is therefore considered as a good alternative to H 2 hydrogenation, which not only reduces the requirements of special equipment but also improves the desired product selectivity due to the diversity of organic hydrogen donors (Scheme 2).…”

“…In recent years, some progress has been made in catalytic transfer hydrogenation. 21,23,24,[28][29][30][31][32][33] For example, Gilkey and Xu have reviewed the recent progress in catalytic transfer hydrogenation for the conversion of biomass-derived feedstocks to fuels and chemicals with a focus on mechanistic interpretation, and they also discussed future challenges and opportunities. 34 Currently, the common hydrogen donors mainly include low molecular mass alcohols (e.g., methanol, ethanol, and isopropanol), and formic acid is also an ideal hydrogen storage medium with a high hydrogen content of 4.4 wt% and stable chemical properties.…”

“…In recent years, some progress has been made in catalytic transfer hydrogenation. 21,23,24,28–33 For example, Gilkey and Xu have reviewed the recent progress in catalytic transfer hydrogenation for the conversion of biomass-derived feedstocks to fuels and chemicals with a focus on mechanistic interpretation, and they also discussed future challenges and opportunities. 34…”