Results 131 to 140 of about 723,633 (329)
Optimization and application of sand bailing technology for coalbed methane horizontal wells
Meitian dizhi yu kantanObjective and Methods Coalbed methane (CBM) horizontal wells face challenges such as sand accumulation in completion strings, pipe wall scaling, and pump sticking, leading to declined CBM production or shutdown of these wells.
Fei ZHANG +10 more
doaj +1 more source
Advanced Science, EarlyView.Cryo‐EM analysis reveals an asymmetric MMOH–MMOB complex with distinct protomers, where MMOB binding triggers structural rearrangements from the surface to the active site. This conformational asymmetry shortens the Fe···Fe distance to 2.7 Å in one protomer, forming a geometry suitable for O2 activation and supporting a sequential catalytic mechanism ...
Yunha Hwang +9 more
wiley +1 more source
Stress‐Induced Melting Controlled Failure Mechanisms of Methane Hydrate
Advanced Science, EarlyView.We study methane hydrate via nanoindentation and nuclear magnetic resonance (NMR), finding its regional melting and mechanical properties, challenging existing views on hydrogen‐bonded crystals. Abstract Methane hydrate, a kind of nonstoichiometric crystalline, attracted worldwide attentions as a promising substitute energy. Its Dissociation is thought
Yanlong Li +9 more
wiley +1 more source
The disaster law and control measures of high-stress tunnels in fault areas: a case study
Scientific ReportsIn recent years, the frequent occurrence of dynamic disasters in tunnels with high stress in fault areas has greatly threatened engineering safety. The typical case – a tunnel influenced by fault slip on is taken as a research object.
Wenjie Li +7 more
doaj +1 more source
Methane Storage in Nanoporous Media as Observed via High-Field NMR Relaxometry [PDF]
, 2015 A. Papaioannou, R. Kausik
openalex +1 more source
Methane concentration and isotopic composition (d13C-CH4) in the Nerja Cave system (South Spain) [PDF]
, 2016 Air in underground caves often has methane (CH4) concentrations below the atmospheric level, due to methanotrophic or other unkown CH4 consuming processes. Caves are thus considered a potential sink for atmospheric methane.
Benavente Herrera, José +5 more
core
Advanced Science, EarlyView.This study employs a nanogap‐induced microwave discharge strategy to pretreat coke deposits on iron‐based catalysts with engineered nanogaps, causing ultrarapid heating to 1990 K within seconds, selectively eliminating >70% surface carbon deposits and converting waste plastics and greenhouse gases into syngas.
Xi Shen +4 more
wiley +1 more source
Ligand‐Induced Electronic Response Enables Predictive QM/MM Simulations
Advanced Science, EarlyView.Quantum mechanics/molecular mechanics (QM/MM) simulations are powerful tools for modeling complex molecular systems; however, their predictability has been constrained by the ambiguous definition of the QM region. An electronically informed protocol is introduced that defines QM regions by quantifying guest‐induced orbital shifts and charge ...
Nichika Ozawa +2 more
wiley +1 more source
Shiyou jixieDeep coal-rock gas reservoir is sensitive to downhole pressure variation， and implementing kill operation may cause damage to gas production. Consequently， a full-process pressure-maintained operation technique of dual-tubing jet pump for deep coal-rock ...
Wu Jianjun +6 more
doaj +1 more source
Methane storage capabilities of diamond analogues
, 2013 Maciej Harańczyk +5 more
openalex +2 more sources