Tsinghua University

Huadian Coal Industry Group Co., Ltd.

Weizhong Qian

Yi Liu

Hao Yu

Yao M Wang

Tong Wang

Yao Wang

Fei Wei

Guohua Luo

Zhifei Li

Yong Jin

Xiulin Wang

Zhanwen Wang

Yu Cui

Changping Gao

Xiaofan Huang

Zuoru Yin

Xiaoping Tang

The present invention relates to a system and process for preparing aromatics from syngases, which has advantages of shortened flow process and reduced investment. The process comprises reforming the liquefied gas, separated dry gas with a water steam to produce carbon monoxide and hydrogen, which return, as raw materials, to the aromatization system, so that the problem of by-product utilization is solved, and the syngas unit consumption per ton of aromatic products is reduced. The problem of utilization of a dry gas as a by-product is also solved in the present invention from the perspective of recycling economy, which reduces the water consumption in the process, and conforms to the concept of green chemistry.

System and method for preparing aromatics by using syngas

The present application provides multistage and multilayer reactors useful for the efficient and continuous production of carbon nanotubes and methods of using the apparatus in the preparation of carbon nanotubes. In one aspect, the multistage reactors include an array of interconnected fluidized-bed reactors. The multilayer reactors include a plurality of reaction zones.

Multistage reactors for continuous production of carbon nanotubes

The present invention relates to a method for continuous production of carbon nanotubes in a nano-agglomerate fluidized bed, which comprises the following steps: loading transition metal compounds on a support, obtaining supported nanosized metal catalysts by reducing or dissociating, catalytically decomposing a carbon-source gas, and growing carbon nanotubes on the catalyst support by chemical vapor deposition of carbon atoms. The carbon nanotubes are 4&#x2dc;100 nm in diameter and 0.5&#x2dc;1000 &#x3bc;m in length. The carbon nanotube agglomerates, ranged between 1&#x2dc;1000 &#x3bc;m, are smoothly fluidized under 0.005 to 2 m/s superficial gas velocity and 20&#x2dc;800 kg/mbed density in the fluidized-bed reactor. The apparatus is simple and easy to operate, has a high reaction rate, and it can be used to produce carbon nanotubes with high degree of crystallization, high purity, and high yield.

Continuous mass production of carbon nanotubes in a nano-agglomerate fluidized-bed and the reactor

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Beijing, China

Weizhong Qian