Results 21 to 30 of about 3,613 (164)

Analysis of Measuring Characteristics of the Differential Pressure Water-Level Measurement System Under Depressurization Condition

Frontiers in Energy Research, 2020
In this paper, RELAP5 code was selected to study the measuring characteristics of the double reference tube level gauge, which is commonly used in high temperature and high pressure vessels on marine nuclear power platforms, under steady and transient ...
Xuwei Zhou, Jie Cheng, Luchao She, Guangming Fan   +3 more
doaj   +1 more source

The Feasibility of Using Pulsed-Vacuum in Stimulating Calcium-Alginate Hydrogel Balls

Foods, 2021
The effect of the pulsed-vacuum stimulation (PVS) on the external gelation process of calcium-alginate (Ca-Alg) hydrogel balls was studied. The process was conducted at four different working pressures (8, 35, 61, and 101 kPa) for three pulsed-vacuum ...
Janjira Jinnoros, Bhundit Innawong, Patchimaporn Udomkun, Pramuk Parakulsuksatid, Juan L. Silva   +4 more
doaj   +1 more source

Evolution law of physical parameters and hydrate reservoir productivity under multi-stage depressurization

Petroleum
In the process of gas hydrate depressurization production, the reasonable depressurization rhythm and depressurization amplitude have significant impact on improving production and reducing engineering geological risks. Considering the basic stability of
Na Wei, Chao Zhang, Li Zhou, Shenghui Zhang, Shouwei Zhou, Liehui Zhang, Jinzhou Zhao, Richard B.Coffin, Bjørn Kvamme   +8 more
doaj   +1 more source

Experimental Simulation of the Exploitation of Natural Gas Hydrate

Energies, 2012
Natural gas hydrates are cage-like crystalline compounds in which a large amount of methane is trapped within a crystal structure of water, forming solids at low temperature and high pressure.
Chang-Yu Sun, Guang-Jin Chen, Ben-Cheng Wu, Xin Yang, Ke-Hua Su, Qing Yuan, Bei Liu   +6 more
doaj   +1 more source

Numerical simulations of depressurization‐induced gas production from hydrate reservoirs at site GMGS3‐W19 with different free gas saturations in the northern South China Sea

Energy Science & Engineering, 2021
Class 1 hydrate reservoirs are regarded as the most promising targets for gas production. Previous investigations in the northern South China Sea have proven that the low‐permeability hydrate reservoir at site GMGS3‐W19 is a Class 1 hydrate deposit ...
Peixiao Mao, Nengyou Wu, Jiaxin Sun, Fulong Ning, Lin Chen, Yizhao Wan, Gaowei Hu, Xinxin Cao   +7 more
doaj   +1 more source

Gas Discharge Resistance and Medium Damage Degree as Hydrate Dissociation at Different Ambient Conditions

Frontiers in Energy Research, 2021
For the investigation on some hydrate dissociation behaviors at different ambient conditions, methane hydrates formed inside porous media with different saturations were dissociated by depressurizations.
Xueping Chen, Xueping Chen, Peng Zhang, Qingbai Wu, Lianhai Zhang, Shuaijun Li, Shuaijun Li, Jing Zhan, Jing Zhan, Yingmei Wang   +9 more
doaj   +1 more source

Experimental Study on CO₂ Sequestration in Marine Environments During Hydrate Recovery by Depressurization Combined with Replacement

Journal of Marine Science and Engineering
To protect the environment, sequestering CO2 during the extraction of natural gas hydrates is a highly promising carbon-neutral technology. We investigated methane extraction and CO2 storage by a combined depressurization and CO2-injection method. In the
Chi Zhang, Jianzhong Zhao, Dong Yang, Qiang Gao   +3 more
doaj   +1 more source

Study on Hydrate Production Behaviors by Depressurization Combined with Brine Injection in the Excess-Water Hydrate Reservoir

Entropy, 2022
Depressurization combined with brine injection is a potential method for field production of natural gas hydrate, which can significantly improve production efficiency and avoid secondary formation of hydrate.
Haopeng Zeng, Yu Zhang, Lei Zhang, Zhaoyang Chen, Xiaosen Li   +4 more
doaj   +1 more source

Experimental Investigation of Characteristics of Sand Production in Wellbore during Hydrate Exploitation by the Depressurization Method

Energies, 2018
Sand production is the process in which formation sand and gravel would migrate into the wellbore by the flow of reservoir fluids. This is a significant problem that endangers the safety of hydrate exploitation.
Jingsheng Lu, Youming Xiong, Dongliang Li, Xiaodong Shen, Qi Wu, Deqing Liang   +5 more
doaj   +1 more source

Ultrathin Amphipathic Dual‐Polymer Networks: Unlocking Hyper‐Permeable CO2 Capture via Solvent‐Mediated Poly(Ethylene Oxide) Amorphization

Advanced Functional Materials, EarlyView.
Hydrophilic PEO‐copolymers and hydrophobic PDMS are physically integrated via a compatibilizing solvent into an amphipathic dual‐polymer network with versatile interfacial affinity and completely amorphized PEO segments for hyper‐permeable CO2 transport.
Ji Wu, Fan Feng, Baiwang Zhao, Jordan Yuan Zhe Ng, Kaiyu Wang, Can Zeng Liang, Guangtai Zheng, Boxuan Zhao, Tai‐Shung Chung, Sui Zhang   +9 more
wiley   +1 more source