Arumugam Ramesh, Jun-Hyuk Ahn, Su-Un Lee, Kwang-Eun Jeong, Temur Khujamuratov, Tae-Wan Kim, Chul-Ung Kim
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引用次数: 0
Abstract
To achieve a higher light olefin yield for the catalytic cracking of kerosene and diesel, the effect of the Si/Al2 ratio (SAR) of zeolite beta (BEA) in steam catalytic cracking (SCC) and direct catalytic cracking (DCC) of n-dodecane (n-C12) was investigated in a fixed bed reaction system over zeolite beta with SAR in a range of 25–360. The catalysts were characterized by XRD, NH3-TPD, pyridine FT-IR, N2-sorption, SEM, and TGA. In both DCC and SCC, n-C12 conversion showed a tendency to decrease linearly as the BA (Brønsted acidity) of the zeolite beta catalyst increased. Both the light olefin yield and the light olefin/paraffin ratio in SCC were higher than that in DCC, where the steam in SCC acts as a diluent, thereby decreasing the partial pressure of the reactants and reducing the formation of paraffins. Through optimization of the operation variables, light olefin yield exceeding 74.3 wt% was obtained in SCC using high silica zeolite beta catalysts with SAR = 300 at TOS = 1 h, 650 °C, and 4.2 h−1.
期刊介绍:
The Korean Journal of Chemical Engineering provides a global forum for the dissemination of research in chemical engineering. The Journal publishes significant research results obtained in the Asia-Pacific region, and simultaneously introduces recent technical progress made in other areas of the world to this region. Submitted research papers must be of potential industrial significance and specifically concerned with chemical engineering. The editors will give preference to papers having a clearly stated practical scope and applicability in the areas of chemical engineering, and to those where new theoretical concepts are supported by new experimental details. The Journal also regularly publishes featured reviews on emerging and industrially important subjects of chemical engineering as well as selected papers presented at international conferences on the subjects.