Resources Conservation and Recycling, Год журнала: 2022, Номер 184, С. 106436 - 106436
Опубликована: Июнь 7, 2022
Язык: Английский
Environmental Science & Technology, Год журнала: 2023, Номер 57(15), С. 6169 - 6178
Опубликована: Апрель 3, 2023
Coastal enhanced weathering (CEW) is a carbon dioxide removal (CDR) approach whereby crushed silicate minerals are spread in coastal zones to be naturally weathered by waves and tidal currents, releasing alkalinity removing atmospheric (CO2). Olivine has been proposed as candidate mineral due its abundance high CO2 uptake potential. A life cycle assessment (LCA) of silt-sized (10 μm) olivine revealed that CEW's life-cycle emissions total environmental footprint, i.e., penalty, amount around 51 kg CO2eq 3.2 Ecopoint (Pt) units per tonne captured CO2, respectively, these will recaptured within few months. Smaller particle sizes dissolve even faster; however, their footprints (e.g., 223 10.6 Pt tCO2–1, for 1 μm olivine), engineering challenges comminution transportation, possible stresses airborne and/or silt pollution) might restrict applicability. Alternatively, larger exhibit lower 14.2 tCO2–1 1.6 1000 olivine) could incorporated zone management schemes, thus possibly crediting CEW with avoided emissions. However, they much slower, requiring 5 37 years before the becomes net negative, respectively. The differences between penalties highlight need using multi-issue impact methods rather than focusing on balances alone. When full profile was considered, it identified fossil fuel-dependent electricity main hotspot, followed nickel releases, which may have large marine ecotoxicity. Results were also sensitive transportation means distance. Renewable energy low-nickel can minimize profile.
Язык: Английский
Процитировано
59
Resources Conservation & Recycling Advances, Год журнала: 2023, Номер 19, С. 200173 - 200173
Опубликована: Июль 18, 2023
In circular economies, it is imperative to implement effective environmental management solutions address resource depletion. Over the past few years, there has been a growing recognition of potential agricultural crop waste in mitigating greenhouse gas (GHG) emissions and promoting global carbon neutrality. Despite lacking practical options, open-field burning residue contributes significantly air pollution. This challenge may be addressed by producing biochar through pyrolysis residues. A application agriculture can contribute reducing warming sequestration atmospheric from soil. As part life cycle assessment biochar, yield during its production are critical factors, which emphasize importance selecting method suitable for biochar. The objective this paper present comprehensive overview agronomic advantages associated with along detailed analysis (LCA). Furthermore, provides an how facilitate local energy sustainable within nexus agroecosystems, environment, energy.
Язык: Английский
Процитировано
58
State of the Planet, Год журнала: 2023, Номер 2-oae2023, С. 1 - 29
Опубликована: Ноя. 27, 2023
Abstract. Ocean alkalinity enhancement (OAE) is an emerging strategy that aims to mitigate climate change by increasing the of seawater. This approach involves ocean enhance its capacity absorb and store carbon dioxide (CO2) from atmosphere. chapter presents overview technical aspects associated with full range OAE methods being pursued discusses implications for undertaking research on these approaches. Various have been developed implement OAE, including direct injection alkaline liquid into surface ocean; dispersal particles ships, platforms, or pipes; addition minerals coastal environments; electrochemical removal acid Each method has advantages challenges, such as scalability, cost effectiveness, potential environmental impacts. The choice technique may depend factors regional oceanographic conditions, source availability, engineering feasibility. considers methods, accelerated weathering limestone, liming, creation hydrated carbonates, environments. In each case, technologies are considered, best-practice drawn. social impacts will likely specific technology local context in which it deployed. Therefore, essential feasibility undertaken parallel with, informed by, wider impact assessments. While shows promise a mitigation strategy, acknowledge limitations uncertainties. Further development needed understand long-term effects, optimize techniques, address unintended consequences. should be viewed complementary extensive emission reductions, improved if operated using energy supply chains minimal CO2 emissions.
Язык: Английский
Процитировано
50
Chemical Engineering Science, Год журнала: 2023, Номер 283, С. 119416 - 119416
Опубликована: Окт. 21, 2023
Currently, scientists and investors consider Direct Air Capture (DAC) as one of the candidates to reduce CO2 emissions. The emissions cut is pressing since 30% (i.e., 20 GtCO2/y) current greenhouse gas must be addressed by 2030. In seven years, removal (CDR) technologies are expected reach a Technology Readiness Level (TRL), relevant industrial applications. most promising at TRL-7, but jump TRL-11 in new IEA scale for disruptive looks unlikely because scale-up from small pilots requires time large investments. Moreover, validation on still missing or even unplanned. This work also identifies critical materials supply chain competition with energy transition limiting factors which could further hinder DAC deployment contribution next years when first significant should addressed.
Язык: Английский
Процитировано
49
Nature Communications, Год журнала: 2024, Номер 15(1)
Опубликована: Авг. 15, 2024
Abstract Hydrogen will play a key role in decarbonizing economies. Here, we quantify the costs and environmental impacts of possible large-scale hydrogen economies, using four prospective demand scenarios for 2050 ranging from 111–614 megatonne H 2 year −1 . Our findings confirm that renewable (solar photovoltaic wind) electrolytic production generates at least 50–90% fewer greenhouse gas emissions than fossil-fuel-based counterparts without carbon capture storage. However, could still result considerable burdens, which requires reassessing concept green hydrogen. global analysis highlights few salient points: (i) mismatch between economical across continents seems likely; (ii) region-specific limitations are inevitable since possibly more 60% large potentials concentrated water-scarce regions; (iii) upscaling be limited by power generation natural resource potentials.
Язык: Английский
Процитировано
31
Nature, Год журнала: 2024, Номер 632(8023), С. 89 - 94
Опубликована: Июль 17, 2024
Reducing carbon dioxide (CO
Язык: Английский
Процитировано
30
Nature Reviews Materials, Год журнала: 2024, Номер 9(8), С. 535 - 549
Опубликована: Июнь 24, 2024
Язык: Английский
Процитировано
28
Process Safety and Environmental Protection, Год журнала: 2024, Номер 187, С. 408 - 430
Опубликована: Апрель 26, 2024
Язык: Английский
Процитировано
18
International journal of greenhouse gas control, Год журнала: 2025, Номер 141, С. 104297 - 104297
Опубликована: Янв. 2, 2025
Язык: Английский
Процитировано
5
Biogeosciences, Год журнала: 2025, Номер 22(2), С. 355 - 384
Опубликована: Янв. 21, 2025
Abstract. Marine enhanced rock weathering (mERW) is increasingly receiving attention as a marine-based carbon dioxide removal (CDR) technology. The method aims to achieve ocean alkalinity enhancement (OAE) by introducing fast-weathering rocks into coastal systems. latter envisioned act large natural biogeochemical reactor, where ambient physical and biological processes can stimulate dissolution, thus generating concomitant release increasing the seawater's capacity sequester CO2. Olivine has been put forward prime candidate mineral for mERW, but at present, no peer-reviewed results are available from larger-scale field studies in areas, so information about olivine dissolution marine systems largely derived laboratory experiments. As result, key uncertainties remain concerning efficiency, CO2 sequestration potential, impact of olivine-based mERW under relevant conditions. In this review, we summarize recent research advancements bridge gap between existing real-world environment which intended take place. To end, identify parameters that govern kinetics sediments associated enable us number still with respect implementation upscaling ERW, well monitoring, reporting, verification (MRV). From our analysis, conclude current knowledge base not sufficient predict outcome situ applications. Particularly, pore-water saturation on rate question additionality generation critical unknowns. more confidently assess potential dedicated pilot conditions needed, should be conducted sufficiently spatial scale monitored long enough time temporal resolution. Additionally, analysis indicates specific sediment type application site (e.g., cohesive versus permeable) will factor applications, it significantly influencing pH, dynamics, generation. Therefore, future also target different types.
Язык: Английский
Процитировано
4