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PNNL team develops new low-cost method to convert captured CO2 to methane

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By using a water-lean post-combustion capture solvent, (N-(2-ethoxyethyl)-3-morpholinopropan-1-amine) (2-EEMPA), they achieved a greater than 90% conversion of captured CO 2 to hydrocarbons—mostly methane—in the presence of a heterogenous Ru catalyst under relatively mild reaction conditions (170 °C and 2 pressure). Heldebrant, D.,

Low Cost 315
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Researchers use melamine to create effective, low-cost carbon capture; potential tailpipe application

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The low cost of porous melamine means that the material could be deployed widely. Mao and her colleagues conducted solid-state nuclear magnetic resonance (NMR) studies to understand how cyanuric acid and DETA interacted to make carbon capture so efficient.

Low Cost 243
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Researchers develop earth-abundant photocatalyst for conversion of ammonia into hydrogen

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This discovery paves the way for sustainable, low-cost hydrogen that could be produced locally rather than in massive centralized plants. The new study is a culmination of that work. It also demonstrates that photocatalysis can be efficiently performed with inexpensive LED photon sources. —co-author Naomi Halas.

Hydrogen 273
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Stanford researchers make ammonia from air and water microdroplets

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The conversion rate reaches 32.9 ± 1.38 This one-step nitrogen-fixation strategy to produce ammonia is eco-friendly and low cost, which converts widely available starting materials into a value-added product. Xiaowei Song, a postdoctoral scholar in chemistry at Stanford, is the lead author of the study. —Song et al.

Water 459
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US researchers demo separation-free, IL-based process for conversion of biomass to advanced biofuel

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In the study, the team demonstrated bisabolene production from sorghum hydrolysate in a scalable one-pot process comprising IL pretreatment, saccharification, and fermentation. Conversion efficiency improved with scale, demonstrating the feasibility of integrating all biomass conversion unit operations within the biorefinery.

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Researchers use chemical looping process to produce hydrogen from hydrogen sulfide gas

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Herein, we demonstrate a sulfur looping scheme in a one-reactor system using a low-cost and environmentally safe iron-based sulfur carrier. Compared with the undoped sulfur carrier, Mo dopant facilitates the surface hydrogen diffusion, thus promoting the overall H 2 S conversion. —Jangam et al.

Hydrogen 425
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New long-duration, extended capacity Na-Al battery design for grid storage

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The new battery design could help ease integration of renewable energy into the electrical grid at lower cost, using Earth-abundant metals, according to a study just published in Energy Storage Materials. h is achieved with an estimated raw active materials cost of $7.02 mAh cm −2 , a discharge duration of 28.2 Weller et al.