氧燃烧方式下痕量元素形态转化的试验和模拟研究

结合热重试验及XRF测量,采用化学热平衡分析方法对煤中易挥发的有毒痕量元素砷、铬、锑和汞在不同燃烧方式下的化学形态及分布进行了研究。计算表明,在常规燃烧方式下,痕量元素在400-1800 K的温度范围内容易蒸发,生成气相单质或氧化物。富氧燃烧条件下,高浓度的CO2(g)以及碳颗粒温度的降低在一定程度上会抑制痕量元素的蒸发,同时CO2(g)也会抑制痕量元素向气相次氧化物及单质的转化。     

氧基燃烧方式下燃煤汞析出规律的初步试验研究

采用管式炉及Hg在线分析仪,初步探讨了空气和O2/CO2气氛中,煤中汞的动态释放过程.发现Hg的析出呈双峰分布:空气气氛下,双峰分别出现在350℃和450℃附近;O2/CO2气氛下Hg析出温度升高,双峰分别出现在略高于350℃和500℃附近;烟气中单质汞浓度升高;两种气氛下,Hg的第二个峰紧邻在稍高温度出现的SO2析出峰,考虑煤中Hg的赋存形态,结合煤的形态硫分析结果,初步推测第一个峰对应有机结合的Hg,第二个峰对应与黄铁矿结合的Hg,且O2/CO2气氛对黄铁矿的分解存在一定影响.     

Testing Temporal Contextuality with Quantum Entangled Histories

Quantum contextuality is a fundamental feature of quantum theory, which has been demonstrated in spatial scenario theoretically and experimentally. In this paper, we proposed a scheme to test temporal contextuality with a two-time entangled history state in the optical system. The contextuality is generated from the sequential projective measurements and revealed by the violation of the temporal Klyachko-Can-Binicioglu-Shumovsky inequality, which is obeyed by the noncontextual hidden variable theories. Compared with the existing schemes for testing quantum contextuality, ours can give the same physical result without collapsing the state. From the point of view of experiment, it is easier to implement as the measurement is projective measurement, and it can be extended to multiple time nodes.

     

氧燃烧方式下重金属Se挥发行为的研究

在氧燃烧方式和空气燃烧方式下对Se的氧化物及其与CaO的混合物进行了热重红外实验,通过TG、DTG、DSC以及X射线衍射分析考察了升温速率、气氛和矿物质对重金属Se在燃烧过程中挥发行为的影响。实验结果显示:氧燃烧气氛下se02的挥发率以及释放总量较之空气气氛发生了较大变化,氧燃烧气氛下,Se化合物的释放总量比空气气氛下低;在同一气氛下,钙硒比越大,钙的固硒效果越明显;升温速率对SeO2挥发的影响较小,主要在于加速或推迟其挥发;氧燃烧方式有助于抑制重金属Se的释放。     

Synthesis and biological evaluation of 3-substituted-indolin-2-one derivatives containing chloropyrrole moieties

Eighteen novel 3-substituted-indolin-2-ones containing chloropyrroles were synthesized and their biological activities were evaluated. The presence of a chlorine atom on the pyrrole ring was crucial to reduce cardiotoxicity. The presence of a 2-(ethyl-amino)ethylcarbamoyl group as a substituent at the C-4' position of the pyrrole enhanced the antitumor activities notably. IC50 values as low as 0.32, 0.67, 1.19 and 1.22 μM were achieved against non-small cell lung cancer (A549), oral epithelial (KB), melanoma (K111) and large cell lung cancer cell lines (NCI-H460), respectively.     

Quantum Zeno Effect with Mixed Initial States

Quantum Zeno effect with mixed initial state is studied here. Frequent projective measurements performed on a bipartite joint pure state system will result in the quantum Zeno effect on the subsystem of interest. This shows the existence of Quantum Zeno effect in the system with mixed initial states.