Selective synthesis of para-xylene and light olefins from CO2/H2 in the presence of toluene

2021 ◽  
Author(s):  
Dengyun Miao ◽  
Xiulian Pan ◽  
Feng Jiao ◽  
Yi Ji ◽  
Guangjin Hou ◽  
...  
Keyword(s):  
Catalytic Hydrogenation ◽  
Raw Materials ◽  
Light Olefins ◽  
Selective Synthesis ◽  
Para Xylene ◽  
Hydrogenation Of Co

Catalytic hydrogenation of CO2 with renewable H2 into valuable chemicals is highly attractive, such as para-xylene and light olefins (C2=-C4=), which are important raw materials for the production of various...

Preparation of Low Chlorine Shellac from Seedlac by Dechlorination Process Using Pd/Fe Binary Metal as Catalyst

2009 ◽  
Vol 79-82 ◽  
pp. 1879-1882 ◽  
Author(s):  
Ya Long Liao ◽  
Fu Chang Xu ◽  
Dong Bo Li
Keyword(s):  
Reaction Temperature ◽  
Catalytic Hydrogenation ◽  
Large Scale ◽  
Raw Materials ◽  
Chemical Deposition ◽  
Structure Characterization ◽  
Binary Metal ◽  
Elementary Analysis ◽  
Chlorine Ions ◽  
Ultraviolet Spectrophotometer

Pd/Fe bimetallic catalysts were synthesized via chemical deposition and used to eliminate chlorine compacted in shellac while it was being bleached with sodium hypochlorite in alkaline solution for the preparation of low chlorine shellac, a natural and biological product used in large scale in food industry and pharmaceutical fields. Experiments demonstrated that the Pd/Fe bimetallic particles could catalyze dechlorination process effectively, which was affected by several factors such as reaction temperature, Pd/Fe ratio, and the induction of Pd/Fe. The dechlorination efficiency reached 81.9% under the conditions of Pd/Fe loading ratio of 0.10wt%, binary metal usage 10 g/L, H2 flowing rate 50 mL/min, and reaction temperature 90°C for 240 min. Moreover, the mechanism of catalytic hydrogenation was elucidated through structure characterization of the final products using elementary analysis, infrared spectroscopy, and ultraviolet spectrophotometer. It was shown from the result of ultraviolet spectrophotometer that the wavelength of the maximum absorption of seedlac, the raw materials for obtaining shellac, was 235 nm. However, it was blue shifted to the same value 222 nm when the shellac was dechlorinated by catalytic hydrogenation with Pd/Fe binary metal particle as the shellac without catalyzed. The results of elementary analysis showed that chlorine content in the final product was only 0.46%, just 1/5 comparing to that of non-declorination by catalytic hydrogenation under the optimum conditions. It was shown that the chlorine ions compacted in the shellac was substituted by hydrogen ions.

scholarly journals SELECTIVE SYNTHESIS OF LIGHT OLEFINS FROM DIMETHYL ETHER OVER ACIDIC SALTS OF H3PW12O40WITH 1,3,5-TRIAZINE

1982 ◽  
Vol 11 (8) ◽  
pp. 1275-1276 ◽  
Author(s):  
Takuo Hibi ◽  
Toshio Okuhara ◽  
Makoto Misono ◽  
Yukio Yoneda
Keyword(s):  
Dimethyl Ether ◽  
Light Olefins ◽  
Selective Synthesis

Comparison and assessment of zeolite catalysts performance dimethyl ether and light olefins production through methanol: a review

2019 ◽  
Vol 39 (3) ◽  
pp. 157-177 ◽  
Author(s):  
Ehsan Kianfar
Keyword(s):  
Dimethyl Ether ◽  
Raw Materials ◽  
Fixed Bed ◽  
Value Added ◽  
Zeolite Catalysts ◽  
Present Review ◽  
Light Olefins ◽  
Light Olefin ◽  
Production Methods ◽  
Olefin Production

AbstractThe present review focuses on a comparison and assessment of zeolite catalyst performance of dimethyl ether and light olefin production through methanol. Dimethyl ether is a clean fuel which needs diverse processes to be produced. Methanol to dimethyl ether is a very novel process which offers considerable advantages versus additional processes for the production of dimethyl ether. The corresponding fixed-bed reactors compose the most important section of such a process. Production of dimethyl ether by the mentioned process is of high importance since it can be catalytically transferred to a substance with the value of propylene. Furthermore, in case of capability to transfer low-purity methanol into dimethyl ether, less expensive methanol can be consequently achieved with higher value added. In the petrochemical industry, light olefins, for example, ethylene and propylene, can be used as raw materials for the production of polyolefin. The present review aims to produce dimethyl ether in order to reach olefin substances, initially conducting a compressive assessment on production methods of olefin substances.

scholarly journals Selective synthesis for light olefins from acetone over ZSM-5 zeolites with nano- and macro-crystal sizes

2011 ◽  
Vol 403 (1-2) ◽  
pp. 183-191 ◽  
Author(s):  
Teruoki Tago ◽  
Hiroki Konno ◽  
Mariko Sakamoto ◽  
Yuta Nakasaka ◽  
Takao Masuda
Keyword(s):  
Light Olefins ◽  
Selective Synthesis

Catalytic hydrogenation of CO 2 into methanol and dimethyl ether over Cu-X/V-Al PILC (X = Ce and Nb) catalysts

2017 ◽  
Vol 289 ◽  
pp. 173-180 ◽  
Author(s):  
Francielle C.F. Marcos ◽  
José M. Assaf ◽  
Elisabete M. Assaf
Keyword(s):  
Dimethyl Ether ◽  
Catalytic Hydrogenation ◽  
Hydrogenation Of Co

Catalytic hydrogenation of CO2 at a structurally rigidified cobalt center

2020 ◽  
Vol 7 (9) ◽  
pp. 1845-1850
Author(s):  
Jonghoon Choi ◽  
Yunho Lee
Keyword(s):  
Catalytic Hydrogenation ◽  
Catalytic Performance ◽  
Hydrogenation Of Co2 ◽  
Hydrogenation Of Co ◽  
Cobalt Center

Catalytic hydrogenation of CO2 occurs at a cobalt center supported by a rigidified PNP ligand revealing higher catalytic performance.

scholarly journals Selective Synthesis of Gas Oil via Oligomerization of Light Olefins Catalyzed by Methanesulphonic Acid

2007 ◽  
Vol 50 (4) ◽  
pp. 188-194
Author(s):  
Shingo Takeuchi ◽  
Tetsuya Mochihara ◽  
Takeshige Takahashi ◽  
Takami Kai ◽  
Yasumasa Morita ◽  
...  
Keyword(s):  
Light Olefins ◽  
Selective Synthesis ◽  
Gas Oil

Recent developments in the catalytic hydrogenation of CO2 to formic acid/formate using heterogeneous catalysts

2016 ◽  
Vol 3 (7) ◽  
pp. 882-895 ◽  
Author(s):  
Gunniya Hariyanandam Gunasekar ◽  
Kwangho Park ◽  
Kwang-Deog Jung ◽  
Sungho Yoon
Keyword(s):  
Formic Acid ◽  
Catalytic Hydrogenation ◽  
Heterogeneous Catalysts ◽  
Hydrogenation Of Co2 ◽  
Recent Developments ◽  
Recent Trends ◽  
Heterogeneous Hydrogenation ◽  
Hydrogenation Of Co

This review highlights the recent trends in the heterogeneous hydrogenation of CO2 to formic acid/formate.

scholarly journals Hydrogenation of CO2 to formic acid with iridiumIII(bisMETAMORPhos)(hydride): the role of a dormant fac-IrIII(trihydride) and an active trans-IrIII(dihydride) species

2016 ◽  
Vol 6 (2) ◽  
pp. 404-408 ◽  
Author(s):  
S. Oldenhof ◽  
J. I. van der Vlugt ◽  
J. N. H. Reek
Keyword(s):  
Formic Acid ◽  
Catalytic Hydrogenation ◽  
Hydrogenation Of Co2 ◽  
Hydrogenation Of Co

Catalytic hydrogenation of CO2 to formate with an IrIII(METAMORPhos) complex in the presence of DBU requires a trans-dihydride for catalytic turnover, with an off-cycle trihydride as the dormant species.

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