Vietnam Petroleum Institute

About: Vietnam Petroleum Institute is a based out in . It is known for research contribution in the topics: Source rock & Catalysis. The organization has 185 authors who have published 120 publications receiving 2354 citations.

Cellulose Aerogel from Paper Waste for Crude Oil Spill Cleaning

Abstract: Polyprolylene is commonly used for crude oil spill cleaning, but it has low absorption capacity and is nonbiodegradable. In our work, a green, ultralight, and highly porous material was successfully prepared from paper waste cellulose fibers. The material was functionalized with methyltrimethoxysilane (MTMS) to enhance its hydrophobicity and oleophilicity. Water contact angles of 143 and 145° were obtained for the MTMS-coated recycled cellulose aerogel. The aerogel achieved high absorption capacities of 18.4, 18.5, and 20.5 g/g for three different crude oils at 25 °C, respectively. In the investigated temperature range of 10, 25, 40, and 60 °C for the absorption of the tested crude oil on the aerogel, a highest absorption capacity of 24.4 g/g was obtained. It was found that the viscosity of the crude oils is the main factor affecting their absorption onto the aerogel. The strong affinity of the MTMS-coated recycled cellulose aerogel to the oils makes the aerogel a good absorbent for crude oil spill cleaning.

Large‐scale drainage capture and surface uplift in eastern Tibet–SW China before 24 Ma inferred from sediments of the Hanoi Basin, Vietnam

Abstract: Current models of drainage evolution suggest that the non-dendritic patterns seen in rivers in SE Asia reflect progressive capture of headwaters away from the Red River during and as a result of surface uplift of Eastern Asia. Mass balancing of eroded and deposited rock volumes demonstrates that the Red River catchment must have been much larger in the past. In addition, the Nd isotope composition of sediments from the Hanoi Basin, Vietnam, interpreted as paleo-Red River sediments, shows rapid change during the Oligocene, before similar to 24 Ma. We interpret this change to reflect large-scale drainage capture away from the Red River, possibly involving loss of the middle Yangtze River. Reorganization was triggered by regional tilting of the region towards the east. This study constrains initial surface uplift in eastern Tibet and southwestern China to be no later than 24 Ma, well before major surface uplift and gorge incision after 13 Ma.

Evolving east Asian river systems reconstructed by trace element and Pb and Nd isotope variations in modern and ancient Red River‐Song Hong sediments

Abstract: [1] Rivers in east Asia have been recognized as having unusual geometries, suggestive of drainage reorganization linked to Tibetan Plateau surface uplift. In this study we applied a series of major and trace element proxies, together with bulk Nd and single K-feldspar grain Pb isotope ion probe isotope analyses, to understand the sediment budget of the modern Red River. We also investigate how this may have evolved during the Cenozoic. We show that while most of the modern sediment is generated by physical erosion in the upper reaches in Yunnan there is significant additional flux from the Song Lo, draining Cathaysia and the SW Yangtze Block. Nd isotope data suggest that 40% of the modern delta sediment comes from the Song Lo. Carbonates in the Song Lo basin make this a major control on the Red River Sr budget. Erosion is not a simple function of monsoon precipitation. Active rock uplift is also required to drive strong erosion. Single grain Pb data show a connection in the Eocene between the middle Yangtze and the Red River, and probably with rivers draining the Songpan Garze terrane. However, the isotope data do not support a former connection with the upper Yangtze, Mekong, or Salween rivers. Drainage capture appears to have occurred throughout the Cenozoic, consistent with surface uplift propagating gradually to the southeast. The middle Yangtze was lost from the Red River prior to 24 Ma, while the connection to the Songpan Garze was cut prior to 12 Ma. The Song Lo joined the Red River after 9 Ma. Bulk sample Pb analyses have limited provenance use compared to single grain data, and detailed provenance is only possible with a matrix of different proxies.

Seismic reflection evidence for a Dangerous Grounds miniplate: No extrusion origin for the South China Sea

Abstract: The collision of India and Asia has caused large strike-slip faults to form in east Asia, resulting in the "extrusion'' of crustal blocks toward the southeast since the Eocene as a result of the indentation of rigid India into Asia It has been suggested that the South China Sea opened as a result of relative motion between a rigid Indochina (Sundaland) block and China Alternative models propose that rifting and seafloor spreading were driven by trench forces to the south We test these competing models by analysis of seismic reflection profiles across the boundary between Sundaland and the southern rifted margin, known as the Dangerous Grounds We show that the southern boundary of the Dangerous Grounds is a subduction zone that jammed in the middle Miocene To the west the Dangerous Grounds are bounded by a strike-slip zone, also active until similar to 16 Ma, that becomes diffuse south of the now inactive South China Sea seafloor spreading center We place the western edge of the Dangerous Grounds just to the east of the Natuna Arch (Lupar Line) The West Baram Line is confirmed as originating as a major strike-slip fault within the Dangerous Grounds and is continuous with the Red River Fault Zone Because the Dangerous Grounds were independent of Sundaland until similar to 6 Ma, its motion cannot have been constrained by motion of this block, making extrusion impossible as a mechanism to rift the South China Sea SE motion by both the Dangerous Grounds and Sundaland suggests subduction forces were the primary trigger for plate motions Our reconstruction places a similar to 280 km upper limit on the motion on the Red River Fault and a similar to 1400 km width to the paleo-South China Sea