Results 61 to 70 of about 469,716 (286)

Oxidation of Coal with Oxygen

The Journal of the Society of Chemical Industry, Japan, 1958
石炭の酸化による粘結性の減退現象を究明する目的で,3種の石炭を試料として酸素を使用して,150℃で酸化を行い,酸素消費量, H2O,CO2,CO等のガス状生成物の測定を行った。なお比較のため, ショ糖,ジベンゾアントロン等も同一条件で酸化した。酸素消費量と時間との関係はlog-logで直線となりSchmidtの結果と一致し, 消費酸素のうち石炭に固定したものは40～65%,H2Oとして26～43%,CO2として8～14%,CO 0.6～2.0%で, H2Oが圧倒的に多く,三者間では70～80%を占め,低石炭化度炭ほどH2Oの生成量が多いことが認められた。このH2Oとしての脱水素量は石炭中の全水素量の1～8%を占め,その面からも石炭組成分の変質が生起していることが窺われた ...
openaire   +2 more sources

Advances and Perspectives in Graphene‐Based Quantum Dots Enabled Neuromorphic Devices

Advanced Science, EarlyView.
Graphene‐based QDs are zero‐dimensional carbon nanomaterials with pronounced quantum confinement and tunable electronic structures. Herein, we summarize their synthesis strategies and functionalization methods, and highlight their functional roles and operating mechanisms in devices, as well as recent advances in neuromorphic electronics. We anticipate
Yulin Zhen, Wei Zeng, Zherui Zhao, JiYu Zhao, Ziyan Huang, Zhuo Chen, Kui Zhou, Guanglong Ding, Su‐Ting Han, Ye Zhou   +9 more
wiley   +1 more source

A Global Methane Observation System to Reduce Uncertainty for Anthropogenic and Natural Sources and Sinks for Detecting and Attributing Climate Feedbacks

Advanced Science, EarlyView.
Conceptual illustration of a Global Ecosystem Methane Observing System (GEM‐OS) integrating satellites, aircraft, atmospheric networks, and ecosystem measurements to quantify methane emissions from anthropogenic and natural sources. The multi‐scale observing framework improves source attribution, reduces uncertainty in regional methane budgets, and ...
P. Ciais, S. Peng, J. Chang, F. Li, Q. Zhu, K. Yuan, G. Hugelius, H. Li, Y. Cai, F. Chevallier, K. Tibrewal, E. A. Kort, K. Arndt, J. Watts, B. Buma, N. Besic, P. I. Palmer, H. Cadillo‐Quiroz, E. Euskirchen, M. J. Gondwe, A. Hoyt, R. Jackson, S. Malone, D. Monteverde, S. Natali, M. Ramonet, C. Rey‐Sanchez, L. B. Sagang, E. A. G. Schuur, R. Vargas, R. Varner, Z. Zhang, B. Poulter   +32 more
wiley   +1 more source

Studies on the Low-Temp Oxidation of Coal Containing Organic Sulfur and the Corresponding Model Compounds

Molecules, 2015
This paper selects two typical compounds containing organic sulfur as model compounds. Then, by analyzing the chromatograms of gaseous low-temp oxidation products and GC/MS of the extractable matter of the oxidation residue, we summarizing the mechanism ...
Lanjun Zhang, Zenghua Li, Jinhu Li, Yinbo Zhou, Yongliang Yang, Yibo Tang   +5 more
doaj   +1 more source

Mechanism of Biodegradation and Methane Production from Low-temperature Oxidized Coal

Taiyuan Ligong Daxue xuebao
[Purposes] The goaf, as the primary residual space following coal mining, boasts a vast and expansive internal space and a rich residual coal resources. This makes it an important potential site for implementing coal-bed methane bioengineering.
GAO Longzhen, MI Shenyu, LIU Yingchao, YIN Yifan, GUO Hongguang   +4 more
doaj   +1 more source

Robust Photocatalytic Hydrogen Evolution Over a Conjugated Metal‐Organic Framework Heterojunction

Advanced Science, EarlyView.
We report a conjugated coordination polymer, Cd‐TMT (TMT = 1,3,5‐trimercaptotriazine), featuring an intrinsic molecular‐level charge transport network. The conjugated TMT ligands facilitate strong intra‐ligand charge transfer, while their ordered π‐π stacking along the [111] direction establishes a continuous pathway for directional electron migration,
Chunzhe Wang, Yufei Shan, Ruobing Chu, Lingzhi Yang, Zhanning Liu, Xiaoli Zhang, Jian Tian   +6 more
wiley   +1 more source

Activated carbons from Mongolian coals by thermal treatment

Mongolian Journal of Chemistry, 2014
Mongolian different rank coals were used as raw material to prepare activatedcarbons by physical activation method. The coal derived carbons were oxidized with nitric acid in order to introduce surface oxygen groups.
A Ariunaa, J Narangerel, B Purevsuren, R Erdenechimeg   +3 more
doaj   +1 more source

Multi‐Scale Bionic Structure Constructs Biomass Flame‐Retardant Thermal Insulation Foam Material

Advanced Science, EarlyView.
Inspired by mussel adhesion and hierarchical brick‐and‐mortar architectures, a cellulose‐based biomimetic foam is constructed by anchoring bentonite nanosheets onto a polydopamine‐decorated cellulose nanofiber network. The resulting foam combines low thermal conductivity with intrinsic flame retardancy and full biodegradability, presenting a ...
Jianming Liao, Lijun Fan, Yunyuan Dong, Xuyu Bao, Xiaobin Chen, Qifu Zheng, Guanqing Zhang, Shen Wang, Wei Chen, Min Zhang, Shuaiming He   +10 more
wiley   +1 more source

CARBON SORBENTS FROM MONGOLIAN BROWN COALS

Proceedings of the Mongolian Academy of Sciences, 2017
Have been determined main technical characteristics and elemental compositions of coal samples from Mongolian coal deposits named Baganuur and Shivee-Ovoo.
Domracheva V A, Gandandorj Siirev
doaj   +1 more source

Additive Manufacturing of High‐Performance Polymers for Extreme Environments

Advanced Science, EarlyView.
Additive manufacturing of high‐performance polymers for extreme environments is critically reviewed through an integrated chemistry‐processing‐structure‐property‐qualification framework. The review compares fused filament fabrication, selective laser sintering, and direct ink writing, linking rheology and thermal history to crystallization, defect ...
Md Tofazzal Hossain, Mohammed Intishar Nur, Md Shajedul Hoque Thakur, Indranil Dey, Md Mesbahul Maruf, Md Jahid Hasan, Suryasarathi Bose, Muhammad M. Rahman   +7 more
wiley   +1 more source