49 research outputs found
Energy consumption trends and their linkages with renewable energy policies in East and Southeast Asian countries: Challenges and opportunities
Global warming is one of today's most critical environmental issues, caused largely by emission of greenhouse gases such as carbon dioxide from burning of fossil fuels. Emissions of carbon dioxide vary throughout countries in Asia. It is increasingly recognised that countries must act to promote the greater use of renewable energy resources as part of actions seeking to mitigate climate change. This paper presents a review of the energy demand scenario in China, Japan, Malaysia and Indonesia and the growth of non-fossil energy in these countries. Energy scenarios within these countries are investigated to identify the opportunities and challenges that exist in developing renewable energy. Energy production among the four countries was analysed. In 2014, China made the highest use of renewables for primary energy production, while Malaysia used them the least. However, fossil energy still constitutes the primary energy source in each country where coal dominates in China (77%) and Indonesia (70%), oil in Japan (28%) and natural gas in Malaysia (61%). In addition, renewable energy policies have been introduced and established based on the energy needs and development status of renewables in each country. This study analyses and compares strengths, weaknesses, opportunities and threats analysis of these countries based on their renewable energy policies. It identifies the challenges for renewable energy development and highlights the necessity of enhanced multilevel governance processes and increased cooperation between the four countries to strengthen their renewable energy sectors and better compete in the global energy market
Rheological properties of oil-in-water emulsions prepared with oil and protein isolates from sesame (Sesamum Indicum)
Influences of temperature on flash pyrolysis products of asphaltite
1118-1122Seguruk (Sirnak, Turkey) asphaltite by flash pyrolysis in a fixed bed reactor with a heating rate 40°C min-1 at 400-800°C
(optimum 550°C) under nitrogen atmosphere gave: solid residue (char), 67.68; oil, 13.28; and water, 0.99%. Seguruk asphaltite
contained: asphaltene, 28.72; preasphaltene, 10.43; aliphatics, 52.54; aromatics, 5.05; and polar aromatic compounds, 3.26%.
Oil obtained from asphaltite is mainly aliphatic according to FTIR spectrum
Removal of Sulfur and Ash from Coal Using Molten Caustic Leaching, a Case Study from Hazro Fields, Turkey
Altın nanomalzeme sentezi ve karekterizasyonu
Nanobiyoteknoloji, nanobilim ve teknolojide çarpıcı ve en hızlı gelişen alanlardan biridir. Altın
nanopartikülleri (AuNP'ler), yeşil sentez ile herhangi bir yüzey aktif madde, stabilizatör ve kimyasal madde
kullanılmadanbıttım(Pistacia terebinthus) yaprak özütü kullanılarak elde edilmiştir. Elde edilen AuNP’lerin
karekterizasyonu UV-vis, SEM-EDX, XRD, FTIR ve TGA-DTA ile yapıldı. SEM-EDX, analizi incelendiğinde
sentezlenen nanomalzemelerin kristal boyutunun 100 nm’nin altında olduğu ve kristal yapısının küresel
olduğu anlaşılmaktadır. UV-vis, analizi verileri gösterdiki oda koşullarında farklı zaman aralıklarında
yapılan ölçümler sonucunda renk değişimi ile maksimum dalga boyunun 335 nm’de karesteristik pik verdiği
görüldü. XRD analizi verilerinden kristal yapılarının boyutu 14.37 nm büyüklükte olduğu hesaplandı. Ayrıca
çalışmamızda sentezlenen nanomalzemenin TGA-DTA analizi yapılarak nanoparçacıkların 1000 oC ‘ye
kadar dayanıklı olduğu rapor edild
Desulfurization and Demineralization of Asphaltite Using Combination of Froth Flotation and Aqueous Caustic Leaching
Gümüş nanomalzeme sentezi ve antimikrobiyal uygulamaları
Çevre dostu sentez yöntemlerinin her geçen gün daha etkin olması ve nanopartiküllerin (NP’lerin) kullanım
alanlarının yaygınlığı bu yöntemlere olan ilginin oldukça artmasına neden olmaktadır. Biz atık durumunda
ki zeytin yapraklarından elde ettiğimiz özüt ile gümüş nano partikülleri (AgNP’leri) basit, ucuz ve çevre
dostu bir yöntemle sentezledik. Bu partiküllerin Ultraviyole ve Görünür Işık Absorpsiyon Spektroskopi (UVVis.), Fourıer Dönüşümlü Kızılötesi Spektroskopisi (FTIR), X-Işınları Kırınım Cihazı (XRD), Taramalı
Elektron Mikroskobu- Enerji Yayılımlı X-ışını (SEM-EDX) ve Termo Gravimetrik (TGA-DTA) analizleri
kullanılarak karakterizasyon işlemi yapılmıştır. Antibiyotik dirençliliği günümüz dünyasının ciddi
sorunlarından biri bu sebeple elde edilen partiküllerin patojen gram pozitif Staphylococcus aureus ATCC
29213, gram negatif Escherichia coli ATCC 25922 suşları ve Candida albicans mayası üzerinde etkili bir
anti-mikrobiyal aktivite gösterdiği tespit edilmiştir. AgNP’lerin MİK (Minimum İnhibisyon Konsantarasyon)
değerleri sırası 0.112, 0.028, ve 0.007 olarak bulunmuştu
A kinetic investigation on the pyrolysis of Seguruk asphaltite
The pyrolysis of Seguruk asphaltite has been investigated using thermogravimetric analysis at atmospheric pressure between 293 to 1223 K at different linear heating rates of 5, 10 and 20 K min(-1) under nitrogen as ambient gas. There was a two-stage thermal decomposition. Thermal decomposition started around 630 K for stage 1 for the slowest heating rate. On the other hand, for the same heating rate and stage 2, thermal decomposition started around 950 K. These values were shifted to higher temperatures with increasing heating rate. In this study, two different Coats-Redfern methods were applied to thermal degradation of Seguruk asphaltite
Use of sequential extraction with UV/Vis spectrophotometer to assess phosphorus species in surface sediments (NE Mediterranean Sea)
The speciation of total phosphorus in different forms is necessary to understand the phosphate exchange mechanisms In sediments, its potential removal from the water column, and the availability of phosphorus for primary producers. This paper presents the phosphorus (P) distribution (total phosphorus, organic phosphorus, and forms of inorganic phosphorus; loosely adsorbed phosphorus and phosphorus bound to aluminium, phosphorus bound to calcium, and phosphorus bound to iron, as well as total inorganic phosphorus) in surface sediments collected from two coasts (each under different anthropogenic pressures) in the eastern Mediterranean Sea in April 2007. The sampling stations are located at on the south-eastern Mediterranean coast of Turkey, adjacent to the Cillcian Basin. The most abundant phosphorus in studied surface sediments was found as calcium-bound phosphorus. Relative abundances of the remaining phosphorus forms follow the order: P-Al > loosely bound-P > P-Fe. The concentration of total phosphorus in the surface sediments taken from Tasucu was found to be higher than the sediments from Erdemli. Accuracy of the method was checked by using NCS DC 73316 certified reference material and the results found were found to be in good agreement with the certified value. Maximum values of total P in Erdemli and Tasucu were 220.35 and 321.42 µg g-1, respectively