http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Hari Prakash Veluswamy (검색결과 3 건)
- 무료
- 기관 내 무료
- 유료
-
A review of solidified natural gas (SNG) technology for gas storage via clathrate hydrates
Veluswamy, Hari Prakash,Kumar, Asheesh,Seo, Yutaek,Lee, Ju Dong,Linga, Praveen Elsevier 2018 APPLIED ENERGY Vol.216 No.-
<P><B>Abstract</B></P> <P>Natural gas (NG), the cleanest burning fossil fuel, plays a crucial role in meeting the global energy demand, contributing to 24% and is projected to grow at a rate of about 2% until 2040. Natural gas is also considered as the bridging fuel to transition into a carbon-constrained world with reduced carbon dioxide emissions whilst catering to the huge energy demand. Efficient and effective modes of NG storage/transport are dire need in the current golden era of natural gas. A plethora of advantages offered by storing NG in the form of hydrates carve a niche for this novel technology. Termed as solidified natural gas (SNG) technology, it has remarkable potential to store multi-fold volumes of natural gas in compact hydrate crystals offering the safest and the most environmental friendly mode of NG storage. This review provides an account on the research efforts put forth in this technology. Hydrate formation and storage aspects have been examined thoroughly with a subtle account on the gas recovery. The review encompasses studies conducted using different promoters (thermodynamic, kinetic or a combination of both) in different reactor configurations, novel/innovative approaches and hybrid processes adopted to improve the kinetics of hydrate formation and to increase the gas storage capacity. Detailed sections on the ‘self-preservation’ and ‘tuning’ effect in hydrates have been included due to their significance in SNG technology. Process chain of the SNG technology, underlying challenges and measures adopted to deploy the SNG technology for large-scale NG storage applications are included in this review.</P> <P><B>Highlights</B></P> <P> <UL> <LI> First review on Solidified Natural Gas (SNG) Technology via clathrate hydrates. </LI> <LI> Prospects for improving the kinetics and storage capacity is presented. </LI> <LI> Critical examination of ‘self-preservation’ and ‘tuning’ effect in hydrates is presented. </LI> <LI> Challenges and future directives for commercial deployment of SNG technology are outlined. </LI> </UL> </P>
-
Kim, Hyunho,Veluswamy, Hari Prakash,Seo, Yutaek,Linga, Praveen The American Chemical Society 2018 CRYSTAL GROWTH AND DESIGN Vol.18 No.11
<P>In this study, we investigate the morphology of methane hydrate formation and growth in the presence of well-known thermodynamic inhibitors, monoethylene glycol (MEG) and methanol (MeOH) in a quiescent system. Morphology changes observed during the growth of methane hydrate while employing 5 wt % MEG and MeOH solutions in the presence and absence of NaCl are presented. When 5 wt % of MEG or MeOH was present in an aqueous solution individually, hydrate grew predominantly within the bulk solution featuring a “ridge”-shaped formation above the interface. In the presence of 3.5 wt % NaCl, an enhanced inhibition was observed for methane hydrates formed from 5 wt % MEG solution with limited hydrate growth in the bulk solution and above the gas-liquid interface. In contrast, 5 wt % MeOH solution in the presence of 3.5 wt % NaCl resulted in an increased hydrate growth in bulk (compared to the system without NaCl) and on the reactor wall above the gas-liquid interface, implying a weak promotion rather than the inhibition. Further, the effect of subcooling (Δ<I>T</I>) on the morphology of methane hydrates in the presence of MeOH/NaCl and MEG/NaCl was examined.</P><P>Morphology of methane hydrate formation observed in the presence of the well-known thermodynamic inhibitors, monoethylene glycol and methanol, individually (at 5 wt % concentration) and along with the presence of 3.5 wt % NaCl at the end of 24 h from nucleation in a quiescent system is presented.</P> [FIG OMISSION]</BR>
-
Mechanism of methane hydrate formation in the presence of hollow silica
Praveen Linga,Hari Prakash Veluswamy,Pinnelli Seetha Rama Prasad 한국화학공학회 2016 Korean Journal of Chemical Engineering Vol.33 No.7
Methane hydrates are studied extensively as a prospective medium for storing and transporting natural gas due to their inherent advantages, including high volumetric energy storage density, being environmentally benign and extremely safe method compared to conventional compression and liquefaction methods. Enhanced formation kinetics of methane hydrates has been reported in hollow silica due to the increased gas/liquid contact surface area available for efficient conversion of water to hydrates. This work elucidates the mechanism of methane hydrate formation in light weight hollow silica. Hollow silica-to-water ratio was varied and its effect on the methane hydrate formation/dissociation morphology was observed. There exists a critical hollow silica-to-water ratio (1 : 6) beyond which the hydrates preferentially crystallize on the top of the bed by drawing water from the interstitial pores, whereas below this ratio the hydrate formation occurs within the bed between inter-particular spaces of hollow silica. Due to the very low bulk density, a small fraction of hollow silica was observed to be displaced from the bed during the hydrate formation above the critical hollow silica to water ratio.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
