Integrated low carbon H₂ conversion with in situ carbon mineralization from aqueous biomass oxygenate precursors by tuning reactive multiphase chemical interactions

Abstract

Meeting our rising demand for clean energy carriers such as H2 from renewable biomass resources is challenged by the co-emission of CO2 and CH4. To address this challenge, we design...

Electrochemical Coproduction of Hydrogen, Oxygen, Sodium Hydroxide, and Hydrochloric Acid from Brines via Direct Electrosynthesis with Chlorine Suppression

“…The design of the brine electrolysis cell is shown in Figure 2. The cell has two end plates and three compartments with outer dimensions of 10 × 10 × 2 cm 3 , totaling a volume of 72 cm 3 . The customized cell was built using a three-dimensional (3D) printer with a polyethylene material that can withstand both acidic and basic conditions.…”

“…However, H 2 production via SMR is accompanied by CO 2 emissions, which need to be captured and stored . Managing CO 2 during or after H 2 production from carbon bearing feedstocks remains challenging, despite the progress that has been made. − Alternatively, water electrolysis is a promising pathway for carbon-free H 2 production; however, fresh water needed for water electrolysis requires energy-intensive desalination or extensive wastewater treatment . These challenges motivate advances in harnessing alternate resources that cogenerate other high-value products alongside H 2 with reduced environmental impacts compared to conventional H 2 production technologies.…”

Tuning Reactive Crystallization Pathways for Integrated CO2 Capture, Conversion, and Storage via Mineralization

“…While this approach is analogous to calcium looping technologies for CO 2 capture which involve carbonate formation followed by calcination to release high-purity CO 2 , carbon mineralization pathways can be tuned to occur at temperatures below 100 °C, which is significantly lower than calcium looping which can reach temperatures of up to 800 °C. As an alternate to direct gas–solid carbon mineralization which occurs above 100 °C and CO 2 partial pressure greater than 20 bar, , gas–liquid–solid reactions can be tuned to occur below 100 °C with ultradilute CO 2 resources. In this context, sequential pH swing approaches which involve the use of acids and bases for the dissolution and formation of Ca- and Mg-bearing hydroxides for enhanced CO 2 mineralization from silicates have also been investigated as shown in reactions and . , MeO ( SiO 2 ) ( s ) + H false( normalaq false) + + OH false( normalaq false) − ⇌ Me false( normalOH false) 2 ( s ) + SiO 2 ( s ) Me false( normalOH false) 2 ( s ) + CO 2 ( g ) ⇌ MeC...…”

Mechanistic insights into the co-recovery of nickel and iron via integrated carbon mineralization of serpentinized peridotite by harnessing organic ligands

“…However, scalable realization of these pathways remains limited by the lack of mechanistic insights into the complex chemo-morphological interactions underlying the co-recovery of energy critical metals with inherent carbon mineralization. Prior studies unlocked the role of siliceous materials and carbon mineralization in enabling enhanced H 2 generation, 8–10 creating carbonate-bearing construction materials, 11 hydroxide/silica production, 12,13 and low carbon and clean manufacturing. 10,14–16 However, the co-recovery of energy critical metals with inherent carbon mineralization remains underexplored despite its transformative potential.…”

“…Prior studies unlocked the role of siliceous materials and carbon mineralization in enabling enhanced H 2 generation, 8–10 creating carbonate-bearing construction materials, 11 hydroxide/silica production, 12,13 and low carbon and clean manufacturing. 10,14–16 However, the co-recovery of energy critical metals with inherent carbon mineralization remains underexplored despite its transformative potential.…”