Evaluating organic waste sources (spent coffee ground) as metal-free catalyst for hydrogen generation by the methanolysis of sodium borohydride

2020 ◽  
Vol 45 (23) ◽  
pp. 12743-12754 ◽  
Author(s):  
Mustafa Kaya
Keyword(s):  
Sodium Borohydride ◽  
Organic Waste ◽  
Hydrogen Generation ◽  
Metal Free ◽  
Spent Coffee Ground ◽  
Coffee Ground

Oxalic Acid Promoted Hydrolysis of Sodium Borohydride for Transition Metal Free Hydrogen Generation

2020 ◽  
Vol 35 (6) ◽  
pp. 1011-1015
Author(s):  
Yuanting Peng ◽  
Hui Zeng ◽  
Yu Shi ◽  
Jinrong Xu ◽  
Lei Xie ◽  
...  
Keyword(s):  
Transition Metal ◽  
Oxalic Acid ◽  
Sodium Borohydride ◽  
Hydrogen Generation ◽  
Metal Free ◽  
Free Hydrogen ◽  
Hydrolysis Of

Boron and nitrogen co-doped carbon dots as a metal-free catalyst for hydrogen generation from sodium borohydride

2016 ◽  
Vol 40 (10) ◽  
pp. 8823-8828 ◽  
Author(s):  
Mohammad Reza Nabid ◽  
Yasamin Bide ◽  
Nazanin Fereidouni
Keyword(s):  
Catalytic Activity ◽  
Synergistic Effect ◽  
Sodium Borohydride ◽  
Carbon Dots ◽  
Hydrogen Generation ◽  
High Catalytic Activity ◽  
Intrinsic Properties ◽  
Metal Free ◽  
Doped Carbon Dots ◽  
Co Doped

The high catalytic activity of B,N co-doped CDs is due to the synergistic effect of nitrogen and boron dopants and the intrinsic properties of carbon dots.

scholarly journals Spent Coffee Ground as Low-Cost Adsorbent for Congo Red Dye Removal from Aqueous Solution

2021 ◽  
Vol 765 (1) ◽  
pp. 012089
Author(s):  
R Taufik ◽  
M Mohamad ◽  
R Wannahari ◽  
N F Shoparwe ◽  
WHW Osman ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Congo Red ◽  
Dye Removal ◽  
Low Cost ◽  
Congo Red Dye ◽  
Spent Coffee Ground ◽  
Coffee Ground ◽  
Red Dye

3D printing of spent coffee ground derived biochar reinforced epoxy composites

2021 ◽  
pp. 002199832110022
Author(s):  
Ahmed Alhelal ◽  
Zaheeruddin Mohammed ◽  
Shaik Jeelani ◽  
Vijaya K Rangari
Keyword(s):  
3D Printing ◽  
Flexural Modulus ◽  
Flexural Properties ◽  
Direct Write ◽  
Thermal And Mechanical Properties ◽  
Spent Coffee Grounds ◽  
Coffee Grounds ◽  
Spent Coffee Ground ◽  
Coffee Ground ◽  
3D Printed

Semi-crystalline carbon biochar is derived from spent coffee grounds (SCG) by a controlled pyrolysis process at high temperature/pressure conditions. Obtained biochar is characterized using XRD, SEM, and TEM techniques. Biochar particles are in the micrometer range with nanostructured morphologies. The SCG biochar thus produced is used as reinforcement in epoxy resin to 3 D print samples using the direct-write (DW) method with 1 and 3 wt. % loadings. Rheology results show that the addition of biochar makes resin viscous, enabling it to be stable soon after print; however, it could also lead to clogging of resin in printer head. The printed samples are characterized for chemical, thermal and mechanical properties using FTIR, TGA, DMA and flexure tests. Storage modulus improved with 1 wt. % biochar addition up to 27.5% and flexural modulus and strength increased up to 55.55% and 43.30% respectively. However, with higher loading of 3 wt. % both viscoelastic and flexural properties of 3D printed samples drastically reduced thus undermining the feasibility of 3D printing biochar reinforced epoxies at higher loadings.

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