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您的检索式：作者名="Jorge Alberto Ramirez"
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| 1 | A techno-economic and life cycle assessment for the production of green methanol from CO_(2): catalyst and process bottlenecks显示文摘The success of catalytic schemes for the large-scale valorization of CO_(2) does not only depend on the development of active,selective and stable catalytic materials but also on the overall process design.Here we present a multidisciplinary study(from catalyst to plant and techno-economic/lifecycle analysis)for the production of green methanol from renewable H2 and CO_(2).We combine an in-depth kinetic analysis of one of the most promising recently reported methanol-synthesis catalysts(InCo)with a thorough process simulation and techno-economic assessment.We then perform a life cycle assessment of the simulated process to gauge the real environmental impact of green methanol production from CO_(2).Our results indicate that up to 1.75 ton of CO_(2) can be abated per ton of produced methanol only if renewable energy is used to run the process,while the sensitivity analysis suggest that either rock-bottom H2 prices(1.5$kg1)or severe CO_(2) taxation(300$per ton)are needed for a profitable methanol plant.Besides,we herein highlight and analyze some critical bottlenecks of the process.Especial attention has been paid to the contribution of H2 to the overall plant costs,CH4 trace formation,and purity and costs of raw gases.In addition to providing important information for policy makers and industrialists,directions for catalyst(and therefore process)improvements are outlined. | Tomas Cordero-Lanzac Adrian Ramirez Alberto Navajas Lieven Gevers Sirio Brunialti Luis MGandía Andrés T.Aguayo S.Mani Sarathy Jorge Gascon | 2022 | Journal of Energy Chemistry2022，31，5： | 3 |
| 2 | Modelling the long-term geomorphic response to check dam failures in an alpine channel with CAESAR-Lisflood显示文摘Globally,between 1950 and 2011 nearly 80,000 debris flow fatalities occurred in densely populated regions in mountainous terrain.Mitigation of these hazards includes the construction of check dams,which limit coarse sediment transport and in the European Alps number in the 100,000s.Check dam functionality depends on periodic,costly maintenance,but maintenance is not always possible and check dams often fail.As such,there is a need to quantify the long-term(10-100 years)geomorphic response of rivers to check dam failures.Here,for the first time,a landscape evolution model(CAESARLisflood)driven by a weather generator is used to replicate check dam failures due to the lack of maintenance,check dam age,and flood occurrence.The model is applied to the Guerbe River,Switzerland,a pre-Alpine catchment containing 73 check dams that undergo simulated failure.Also presented is a novel method to calibrate CAESAR-Lisflood's hydrological component on this ungauged catchment.Using 100-year scenarios of check dam failure,the model indicates that check dam failures can produce 8 m of channel erosion and a 322%increase in sediment yield.The model suggests that after check dam failure,channel erosion is the remobilization of deposits accumulated behind check dams,and,after a single check dam failure channel equilibrium occurs in five years,but after many check dam failures channel equilibrium may not occur until 15 years.Overall,these findings support the continued maintenance of check dams. | Jorge Alberto Ramirez Mirjam Mertin Nadav Peleg Pascal Horton Chris Skinner Markus Zimmermann Margreth Keiler | 2022 | International Journal of Sediment Research2022，37，5： | 1 |
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