Results 41 to 50 of about 6,569 (208)

Ambient Hydrocarbonylation of Olefins Enabled by Visible‐Light

Advanced Science, EarlyView.
A novel photo‐induced methodology for hydrocarbonylation has been established, resolving the inherent conflicts between competitive olefin and CO insertion in traditional methods that necessitate harsh conditions. Accordingly, an efficient and versatile hydrocarbonylation of olefins enabled by visible‐light irradiation under ambient conditions has been
Hongchi Liu, Tianze Zhang, Hanmin Huang
wiley   +1 more source

Characterization of syngas produced from biomass gasification

MATEC Web of Conferences, 2018
This conference paper presents biomass (wood chips from the production process of sawmills) as a renewable energy source to produce electric energy by gasification.
Najser Jan, Němček Ondřej, Mikeska Marcel   +2 more
doaj   +1 more source

The Future of Hydrogen‐Powered Aviation: Technologies, Challenges, and a Strategic Roadmap for Sustainable Decarbonization

Advanced Energy and Sustainability Research, EarlyView.
Hydrogen‐powered aviation offers a transformative pathway to zero‐emission flight by eliminating in‐flight CO2 emissions. Key considerations include propulsion systems (fuel cells and hydrogen combustion), cryogenic storage and insulation challenges, infrastructure and cost barriers, and supply‐chain constraints.
Mubasshira, Md Mahbubur Rahman, Karib Hassan Khan, Md Nizam Uddin, Dewan Hafiz Nabil   +4 more
wiley   +1 more source

Emission characteristics and efficiency assessment of biomass-derived syngas in a spark-ignition generator compared to LPG and gasoline

Results in Engineering
This study investigates the performance and emission characteristics of biomass gasification-derived syngas under various loads in comparison to Liquefied Petroleum Gas (LPG) and gasoline in a spark-ignition, single-cylinder generator. In the experiment,
Fredy Surahmanto, Achmad Arifin, Sutiman, Mochamad Syamsiro, Novi Caroko   +4 more
doaj   +1 more source

A trust‐region funnel algorithm for gray‐box optimization

AIChE Journal, EarlyView.
Abstract Gray‐box optimization, where parts of optimization problems are represented by algebraic models while others are treated as black‐box models lacking analytic derivatives, remains a challenge. Trust‐region (TR) methods provide a robust framework for gray‐box problems through local reduced models (RMs) for black‐box components, but they are ...
Gul Hameed, Tao Chen, Antonio del Rio Chanona, Lorenz T. Biegler, Michael Short   +4 more
wiley   +1 more source

Syngas biomethanation: effect of biomass-gas ratio, syngas composition and pH buffer

Bioresource Technology, 2021
The concept of syngas biomethanation is attractive, however, it still needs improvement in optimizing the operational conditions. In the present study, syngas fermentations under different carbon monoxide (CO), carbon dioxide (CO2) and hydrogen (H2) compositions were conducted under two different biomass-gas ratio (BGR) systems. The results showed that
Li, Chunxing, Zhu, Xinyu, Angelidaki, Irini   +2 more
openaire   +3 more sources

Effect of syngas recirculation in the pyrolysis zone on the rice husk gasification process using the downdraft reactor

Case Studies in Thermal Engineering
As one of the world's largest rice producers, Indonesia has an abundance of rice husk as a byproduct of rice milling. Rice husks were utilized to examine downdraft gasification with syngas recirculation system.
Rudi Hermawan, Cahyadi, Adi Suryosatyo, Yohanis Tangke Tosuli, Hafif Dafiqurrohman   +4 more
doaj   +1 more source

Kontrolle heterogener Katalyse mittels Unter‐Oberflächen‐Sauerstoff

Angewandte Chemie, EarlyView.
Während der CO‐Oxidation auf Rhodiumoberflächen wird die Reaktionsdynamik in der Gegenwart von Unter‐Oberflächen‐Sauerstoff (Osub) deutlich verändert. Unter‐Oberflächen‐Sauerstoff stabilisiert vorübergehend durch Oberflächenreaktionen gebildetes physisorbiertes CO2, was diesem ermöglicht, vorübergehend zu binden und mit der Oberfläche zu thermalisieren.
Arved C. Dorst, Zhikai Jiang, Maxwell Gillum, Rasika E. A. Dissanayake, Bin Jiang, Daniel R. Killelea, Tim Schäfer   +6 more
wiley   +1 more source

Controlling Heterogeneous Catalysis With Subsurface Oxygen

Angewandte Chemie International Edition, EarlyView.
During CO oxidation on rhodium surfaces, the reaction dynamics are markedly altered in the presence of subsurface oxygen. Subsurface oxygen stabilizes the nascent physisorbed CO2 formed after the surface reaction, allowing it to become transiently trapped and thermalize with the surface.
Arved C. Dorst, Zhikai Jiang, Maxwell Gillum, Rasika E. A. Dissanayake, Bin Jiang, Daniel R. Killelea, Tim Schäfer   +6 more
wiley   +1 more source

Technobiological Pathways for High‐CO₂ Capture Using Micro‐/Macroalgae: Genetic Engineering, Process Automation, and Value‐Added Bioproducts

Asia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT Greenhouse gas (GHG) emissions have emerged as one of the most critical drivers of climate change; this is primarily due to high concentrations and long atmospheric life of carbon dioxide (CO2). For a significant amount of time, various biological processes such as microalgal cultivation, cyanobacterial systems, photosynthetic microorganisms ...
Sadhana Semwal, Harish Chandra Joshi
wiley   +1 more source