Volume 3, Issue 2, Pages (August 2017)

Slides:



Advertisements
Similar presentations
Volume 3, Issue 2, Pages (August 2017)
Advertisements

Volume 2, Issue 2, Pages (February 2017)
High-Density 3D Single Molecular Analysis Based on Compressed Sensing
“Seeing” the Invisibles at the Single-Molecule Level
A New Dimension for Low-Dimensional Carbon Nanostructures
Quentin Michaudel, Brett P. Fors  Chem 
Reaction: A New Genesis for Origins Research?
Volume 3, Issue 3, Pages (September 2017)
Volume 1, Issue 4, Pages (October 2016)
Volume 1, Issue 5, Pages (November 2016)
Luc Neuville, Philippe Dauban  Chem 
Synthesis and Solution Processing of a Hydrogen-Bonded Ladder Polymer
Applications of Zeolites in Sustainable Chemistry
Volume 3, Issue 2, Pages (August 2017)
Direct Growth of Well-Aligned MOF Arrays onto Various Substrates
Simple and Clean Photo-induced Methylation of Heteroarenes with MeOH
Synthesis of Acrylic Acid Derivatives from CO2 and Ethylene
Volume 1, Issue 4, Pages (December 2017)
Flowthrough Reductive Catalytic Fractionation of Biomass
Hai-xia Zhong, Yu Zhang, Xin-bo Zhang  Chem 
Wei Wen, Jin-Ming Wu, Yin-Zhu Jiang, Lu-Lu Lai, Jian Song  Chem 
Jianchun Wang, Lei Zhang, Zhe Dong, Guangbin Dong  Chem 
Volume 1, Issue 2, Pages (August 2016)
Volume 3, Issue 5, Pages (November 2017)
Image-Guided Therapy Using Maghemite-MOF Nanovectors
Volume 4, Issue 1, Pages (January 2018)
Volume 5, Issue 3, Pages (March 2019)
Volume 12, Issue 9, Pages (September 2005)
Volume 23, Issue 3, Pages (March 2016)
Catalyzing Excellence: In a Competitive High-Stakes Research Arena, Can We Be Our Own Catalysts for Success?  Alyssa-Jennifer Avestro  Chem  Volume 1,
Volume 2, Issue 2, Pages (February 2017)
Labile Peroxides in Secondary Organic Aerosol
Volume 3, Issue 3, Pages (September 2017)
Exploring New Frontiers in Medical Diagnostics through Collaboration
Volume 3, Issue 2, Pages (February 2019)
Volume 4, Issue 4, Pages (April 2018)
What Limits the Performance of Ta3N5 for Solar Water Splitting?
Xiaoqiao Zeng, Chun Zhan, Jun Lu, Khalil Amine  Chem 
Aromatics from Syngas: CO Taking Control
Volume 1, Issue 6, Pages (December 2016)
Volume 2, Issue 6, Pages (June 2017)
Construction of Complex CoS Hollow Structures with Enhanced Electrochemical Properties for Hybrid Supercapacitors  Han Hu, Bu Yuan Guan, Xiong Wen (David)
Chao Luo, Xiulin Fan, Zhaohui Ma, Tao Gao, Chunsheng Wang  Chem 
Transforming CO2 by Stabilizing the Labile Product
Sensing Very Weak Strains at the Single-Molecule Scale
Khalid AlKaabi, Casey R. Wade, Mircea Dincă  Chem 
Volume 2, Issue 3, Pages (March 2018)
Volume 4, Issue 5, Pages (May 2018)
The Dynamic Nature of Phosphorus
Bin Li, Hui-Min Wen, Wei Zhou, Jeff Q. Xu, Banglin Chen  Chem 
Volume 4, Issue 5, Pages (May 2018)
A New Horizon for Fischer-Tropsch Synthesis
Volume 3, Issue 1, Pages (July 2017)
Xiang-Yu Chen, Dieter Enders  Chem 
Yang Lou, Honglu Wu, Jingyue Liu
Chi Chen, Juliet F. Khosrowabadi Kotyk, Stafford W. Sheehan  Chem 
Volume 3, Issue 1, Pages 8-10 (July 2017)
Long Jiao, Hai-Long Jiang  Chem  Volume 5, Issue 4, Pages (April 2019)
Volume 4, Issue 3, Pages (March 2018)
Volume 2, Issue 6, Pages (June 2017)
Khalid AlKaabi, Casey R. Wade, Mircea Dincă  Chem 
Volume 2, Issue 2, Pages (February 2017)
Facile Synthesis of Multi-shelled ZnS-CdS Cages with Enhanced Photoelectrochemical Performance for Solar Energy Conversion  Peng Zhang, Bu Yuan Guan,
Polynuclear Clusters: Bridging between Metal Ion and Metal Oxide
Volume 2, Issue 3, Pages (March 2017)
Volume 3, Issue 5, Pages (November 2017)
Reaction: Synthesis in Drug Discovery, the Short and Long of It
Room-Temperature Conversion of Methane Becomes True
Volume 3, Issue 1, Pages (July 2017)
Volume 3, Issue 5, Pages (November 2017)
Presentation transcript:

Volume 3, Issue 2, Pages 334-347 (August 2017) Bifunctional Catalysts for One-Step Conversion of Syngas into Aromatics with Excellent Selectivity and Stability  Kang Cheng, Wei Zhou, Jincan Kang, Shun He, Shulin Shi, Qinghong Zhang, Yang Pan, Wu Wen, Ye Wang  Chem  Volume 3, Issue 2, Pages 334-347 (August 2017) DOI: 10.1016/j.chempr.2017.05.007 Copyright © 2017 Elsevier Inc. Terms and Conditions

Chem 2017 3, 334-347DOI: (10.1016/j.chempr.2017.05.007) Copyright © 2017 Elsevier Inc. Terms and Conditions

Figure 1 Effect of Temperature on Catalytic Performance (A) Zn–ZrO2 for syngas conversion. (B) Zn–ZrO2/ZSM-5 for syngas conversion. Reaction conditions: catalyst weight, 0.10 g for Zn–ZrO2 and 0.30 g for Zn–ZrO2/H-ZSM-5; 573–723 K; H2/CO, 2:1; 3 MPa; 25 cm3 min−1. Selectivity was calculated on a molar carbon basis for CO hydrogenation. Black arrows denote CO conversion. See Table S3 for detailed product distributions. The formation of CO2 by the WGS reaction is also shown in Table S3. Chem 2017 3, 334-347DOI: (10.1016/j.chempr.2017.05.007) Copyright © 2017 Elsevier Inc. Terms and Conditions

Figure 2 Effect of Contact Time on Catalytic Performance (A) Zn–ZrO2 for syngas conversion. (B) Zn–ZrO2/H-ZSM-5 for syngas conversion. (C) Reaction scheme over the bifunctional catalyst. Reaction conditions: catalyst weight, 0.010–3.0 g; 673 K; H2/CO, 2:1; 3 MPa; 25 cm3 min−1. The selectivity was calculated on a molar carbon basis for CO hydrogenation. Black arrows denote CO conversion. See Table S4 for detailed product distributions. The formation of CO2 by the WGS reaction is also shown in Table S4. Chem 2017 3, 334-347DOI: (10.1016/j.chempr.2017.05.007) Copyright © 2017 Elsevier Inc. Terms and Conditions

Figure 3 Effect of Key Catalyst Factors on the Performance of Bifunctional Catalysts (A) Zn/Zr molar ratio. (B) ZrO2/H-ZSM-5 with different densities of strong acid sites. Reaction conditions: catalyst weight 1.0 g; 703 K; H2/CO, 2:1; 3 MPa; 25 cm3 min−1. C5+ denotes aliphatic hydrocarbons with carbon numbers ≥5. Selectivity was calculated on a molar carbon basis for CO hydrogenation. The formation of CO2 by the WGS reaction also occurred and the selectivity of CO2 was in the range of 38%–42% over these catalysts. Black arrows denote CO conversion. Chem 2017 3, 334-347DOI: (10.1016/j.chempr.2017.05.007) Copyright © 2017 Elsevier Inc. Terms and Conditions

Figure 4 Effect of the Proximity of the Two Components (A) (i) Dual bed (0.33 g Zn–ZrO2 + 0.67 g H-ZSM-5); (ii) mixing of granules of two components with sizes of 250–600 μm; (iii) Zn–ZrO2 nanoparticles dispersed on micrometer-sized H-ZSM-5 crystallites; (iv) nanocomposites of Zn–ZrO2 and H-ZSM-5. Reaction conditions: catalyst weight 1.0 g; 673 K; H2/CO, 2:1; 3 MPa; 25 cm3 min−1. (B) Scanning electron microscopy images for the sample with Zn–ZrO2 nanoparticles dispersed on micrometer-sized H-ZSM-5 crystallites. Scale bar, 1 μm. (C) Transmission electron microscopy images for the nanocomposite of Zn–ZrO2 and H-ZSM-5. Scale bar, 50 nm. Chem 2017 3, 334-347DOI: (10.1016/j.chempr.2017.05.007) Copyright © 2017 Elsevier Inc. Terms and Conditions

Figure 5 Stability of the Zn–ZrO2/H-ZSM-5 Catalyst Reaction conditions: catalyst weight 3.0 g; 673 K; H2/CO, 2:1; 3 MPa; 25 cm3 min−1. Chem 2017 3, 334-347DOI: (10.1016/j.chempr.2017.05.007) Copyright © 2017 Elsevier Inc. Terms and Conditions

Figure 6 Tuning the BTX Fraction in Aromatics by Silylation of H-ZSM-5 with TEOS (A) Fractions of products in aromatics. Reaction conditions: catalyst weight 1.0 g; 703 K; H2/CO, 2:1; 3 MPa; 25 cm3 min−1. See also Table S8. (B) 2,6-DTBPy-adsorbed FT-IR. (C) Scheme for suppressing the formation of heavier aromatics by selective silylation of external Brønsted acidity. Chem 2017 3, 334-347DOI: (10.1016/j.chempr.2017.05.007) Copyright © 2017 Elsevier Inc. Terms and Conditions

Figure 7 Effect of CO on Methanol Conversion over the Zn–ZrO2/H-ZSM-5 Catalyst (A) Effect of CO on product selectivity in methanol conversion. (B) Functioning mechanism of CO. (C) Incorporation of 13C into toluene during the conversion of CH3OH under 13CO. Catalytic reactions were performed at 673 K with 100% CH3OH conversion in each case. Experimental details are shown in Supplemental Information. Chem 2017 3, 334-347DOI: (10.1016/j.chempr.2017.05.007) Copyright © 2017 Elsevier Inc. Terms and Conditions

Scheme 1 Typical Reaction Processes Related to Syngas Chemistry The red-line route demonstrates our SMA process for the direct synthesis of aromatics via reaction coupling. Chem 2017 3, 334-347DOI: (10.1016/j.chempr.2017.05.007) Copyright © 2017 Elsevier Inc. Terms and Conditions