Production of hydrogen and carbon nanotubes via catalytic thermo‐chemical conversion of plastic waste: review

2019 ◽  
Vol 95 (1) ◽  
pp. 11-19 ◽  
Author(s):  
Snigdha S Sharma ◽  
Vidya S Batra
Keyword(s):  
Carbon Nanotubes ◽  
Chemical Conversion ◽  
Plastic Waste ◽  
Production Of Hydrogen

Moving Brick Receiver–Reactor: A Solar Thermochemical Reactor and Process Design With a Solid–Solid Heat Exchanger and On-Demand Production of Hydrogen and/or Carbon Monoxide

2019 ◽  
Vol 141 (2) ◽  
Author(s):  
Silvan Siegrist ◽  
Henrik von Storch ◽  
Martin Roeb ◽  
Christian Sattler
Keyword(s):  
Carbon Monoxide ◽  
Heat Exchanger ◽  
Solid Phase ◽  
Chemical Conversion ◽  
Operating Conditions ◽  
On Demand ◽  
Commercial Plant ◽  
Production Of Hydrogen ◽  
Solar Thermochemical ◽  
Oxidation Reactor

Three crucial aspects still to be overcome to achieve commercial competitiveness of the solar thermochemical production of hydrogen and carbon monoxide are recuperating the heat from the solid phase, achieving continuous or on-demand production beyond the hours of sunshine, and scaling to commercial plant sizes. To tackle all three aspects, we propose a moving brick receiver–reactor (MBR2) design with a solid–solid heat exchanger. The MBR2 consists of porous bricks that are reversibly mounted on a high temperature transport mechanism, a receiver–reactor where the bricks are reduced by passing through the concentrated solar radiation, a solid–solid heat exchanger under partial vacuum in which the reduced bricks transfer heat to the oxidized bricks, a first storage for the reduced bricks, an oxidation reactor, and a second storage for the oxidized bricks. The bricks may be made of any nonvolatile redox material suitable for a thermochemical two-step (TS) water splitting (WS) or carbon dioxide splitting (CDS) cycle. A first thermodynamic analysis shows that the MBR2 may be able to achieve solar-to-chemical conversion efficiencies of approximately 0.25. Additionally, we identify the desired operating conditions and show that the heat exchanger efficiency has to be higher than the fraction of recombination in order to increase the conversion efficiency.

scholarly journals Co-production of hydrogen and carbon nanotubes from catalytic pyrolysis of waste plastics on Ni-Fe bimetallic catalyst

2017 ◽  
Vol 148 ◽  
pp. 692-700 ◽  
Author(s):  
Dingding Yao ◽  
Chunfei Wu ◽  
Haiping Yang ◽  
Yeshui Zhang ◽  
Mohamad A. Nahil ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Catalytic Pyrolysis ◽  
Bimetallic Catalyst ◽  
Waste Plastics ◽  
Production Of Hydrogen

Enhancing the production of hydrogen peroxide from electrocatalytic oxygen reduction reaction by tailoring the electronic states of single-walled carbon nanotubes: a synergistic effect from interior filling and exterior oxidation

2019 ◽  
Vol 3 (8) ◽  
pp. 1951-1956 ◽  
Author(s):  
Rongtao Hu ◽  
Fenfa Yao ◽  
Chuxin Wu ◽  
Chuanhong Jin ◽  
Lunhui Guan
Keyword(s):  
Carbon Nanotubes ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Single Walled Carbon Nanotubes ◽  
Phosphomolybdic Acid ◽  
Reduction Reaction ◽  
Single Walled Carbon ◽  
Electrocatalytic Oxygen Reduction ◽  
Production Of Hydrogen ◽  
Walled Carbon Nanotubes

Single-walled carbon nanotubes co-modified with interior filling of phosphomolybdic acid and successive exterior oxidation (O-HPMO@SWCNTs) possess better two-electron oxygen reduction reaction performance than the HPMO-filled SWCNTs, oxidized SWCNTs or pristine SWCNTs.

Synthesis of fuel oil and carbon nanotubes in an autoclave using plastic waste as precursor

2016 ◽  
Vol 32 (5) ◽  
pp. 495-500 ◽  
Author(s):  
Ganesh Bajad ◽  
Rajat Jain ◽  
Warun Harhare ◽  
Vijayakumar R. P. ◽  
Suryasarathi Bose
Keyword(s):  
Carbon Nanotubes ◽  
Plastic Waste ◽  
Fuel Oil
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