Benign-by-design N-doped carbonaceous materials obtained from the hydrothermal carbonization of sewage sludge for supercapacitor applications

Abstract

This contribution discloses a new methodology for the preparation of N-doped carbon via the hydrothermal carbonization (HTC) of sewage sludge (SS).

Efficient energy storage in mustard husk derived porous spherical carbon nanostructures

“…A comparison of electrochemical performance of PSCN with other carbon materials derived from various bio-sources is given in Table 2. [21][22][23][24][25][26][27][29][30][31][32][33][59][60][61][62][63] To understand the underlying reasons for such excellent cycling stability, electrochemical impedance spectroscopy was carried out in the as-assembled state and after 10,000 cycles (Fig. S4a, b; ESI †).…”

“…[7][8][9][10][11][12][13][14] Not only it will provide a green route with a low carbon footprint, but also will provide energy sustainability by the abundance, low cost, and easy processing of the naturally occurring biomass. Realizing this, a number of research work has been devoted to extract porous carbon from various biomasses and study their electrochemical properties as LIB anode e.g., wheat straw, 15 rice husk, 16 coconut oil, 9 Avocado seeds waste, 17 Starch, 7 Green tea leave, 18 Coffee oil, 19 Sweet potato, 8 Banana peel 20 etc., and also as supercapacitor electrode e.g., Apple waste, 21 Tannin, 22 petals, 23 Sugar cane bagasse, 24,25 Sewage sludge, 26 Moringa oleifera leaves, 27 Sunflower Stalk, 28 Puffed rice, 29 Popcorn, 30 Coconut shell, 31 Moringa oleifera stems, 32 Camellia petals, 33 etc. Some excellent recent review articles on biomass derived carbons for various energy storage applications validate the importance of this approach.…”

Process Water Recirculation During Hydrothermal Carbonization as a Promising Process Step Towards the Production of Nitrogen-Doped Carbonaceous Materials

“…While Wüst et al described the formation of the carbohydrate-originated products [6], Becker et al studied the formation of lipid-and lignin-originated products [5] and Zhuang et al investigated the formation of proteinoriginated products of HTC with PW recirculation [24,25]. Two studies have been published so far that also adressed the reaction pathways in the reaction medium more in detail, with respect to the physicochemical characteristics of the obtained HCs [26,27].…”

Investigation of sewage sludge and peanut shells co‐combustion using thermogravimetric analysis and artificial neural network

“…Combustion, as one of the promising heat treatment methods, results in the significant reduction of material volume, destruction of hazardous materials, and efficient energy utilization of combustible organic matter 6 . The disposal of a great amount of SS waste was an extremely complicated problem 7,8 . Combustion can convert SS into fuel in order to alleviate energy shortage, and it is also an effective way to harmlessly dispose of SS.…”

“…6 The disposal of a great amount of SS waste was an extremely complicated problem. 7,8 Combustion can convert SS into fuel in order to alleviate energy shortage, and it is also an effective way to harmlessly dispose of SS.…”