Repeated Biodiesel Production from Waste Coffee Grounds via a One-step Direct Process with a Cartridge Containing Solid Catalysts Manufactured from Waste Eggshells

2020 ◽  
Vol 25 (4) ◽  
pp. 623-632
Author(s):  
Gahee Im ◽  
Sung Ho Yeom
Keyword(s):  
Biodiesel Production ◽  
Direct Process ◽  
Solid Catalysts ◽  
Coffee Grounds ◽  
One Step

One-Step Preparation of Efficient and Reusable SO42−/ZrO2-Based Hybrid Solid Catalysts Functionalized by Alkyl-Bridged Organosilica Moieties for Biodiesel Production

ChemSusChem ◽  
2011 ◽  
Vol 4 (6) ◽  
pp. 744-756 ◽  
Author(s):  
Wei Li ◽  
Fengyan Ma ◽  
Fang Su ◽  
Ling Ma ◽  
Shengqu Zhang ◽  
...  
Keyword(s):  
Biodiesel Production ◽  
Solid Catalysts ◽  
One Step

scholarly journals Synthesis of bifunctional nanocatalyst from waste palm kernel shell and its application for biodiesel production

RSC Advances ◽  
2020 ◽  
Vol 10 (45) ◽  
pp. 27183-27193
Author(s):  
Rose Fadzilah Abdullah ◽  
Umer Rashid ◽  
Yun Hin Taufiq-Yap ◽  
Mohd Lokman Ibrahim ◽  
Chawalit Ngamcharussrivichai ◽  
...  
Keyword(s):  
Palm Kernel ◽  
Biodiesel Production ◽  
Palm Kernel Shell ◽  
Mild Conditions ◽  
One Step

The potential of bifunctional nanocatalysts obtained from waste palm kernel shell (PKS) was investigated for one-step transesterification–esterification under mild conditions.

Global Reaction Model to Describe the Kinetics of Catalytic Pyrolysis of Coffee Grounds Waste

2017 ◽  
Vol 899 ◽  
pp. 173-178 ◽  
Author(s):  
Ronydes Batista Jr. ◽  
Bruna Sene Alves Araújo ◽  
Pedro Ivo Brandão e Melo Franco ◽  
Beatriz Cristina Silvério ◽  
Sandra Cristina Danta ◽  
...  
Keyword(s):  
Thermal Decomposition ◽  
Large Scale ◽  
Catalytic Pyrolysis ◽  
Petroleum Products ◽  
Reaction Model ◽  
Heating Rates ◽  
Coffee Grounds ◽  
One Step ◽  
Global Reaction ◽  
The One

In view of the constant search for new sources of renewable energy, the particulate agro-industrial waste reuse emerges as an advantageous alternative. However, despite the advantages of using the biomass as an energy source, there is still strong resistance as the large-scale replacement of petroleum products due to the lack of scientifically proven efficient conversion technologies. In this context, the pyrolysis is presented as one of the most widely used thermal decomposition processes. The knowledge of aspects of chemical kinetics, thermodynamics these will, heat and mass transfer, are so important, since influence the quality of the product. This paper presents a kinetic study of slow pyrolysis of coffee grounds waste from dynamic thermogravimetric experiments (TG), using different powder catalysts. The primary thermal decomposition was described by the one-step reaction model, which considers a single global reaction. The kinetic parameters were estimated using nonlinear regression and the differential evolution method. The coffee ground waste was dried at 105°C for 24 hours. The sample in nature was analyzed at different heating rates, being 10, 15, 20, 30 and 50 K/min. In the catalytic pyrolysis, about 5% (w/w) of catalyst were added to the sample, at a heating rate of 30 K/min. The results show that the one-step model does not accurately represent the data of weight loss (TG) and its derivative (DTG), but can do an estimative of the activation energy reaction, and can show the differences caused by the catalysts. Although no one can say anything about the products formed with the addition of the catalyst, it would be necessary to micro-pyrolysis analysis, we can say the influence of the catalyst in the samples, based on the data obtained in thermogravimetric tests.

Extraction and esterification of waste coffee grounds oil as non-edible feedstock for biodiesel production

2019 ◽  
Vol 133 ◽  
pp. 1414-1425 ◽  
Author(s):  
Chokchai Mueanmas ◽  
Ruamporn Nikhom ◽  
Anida Petchkaew ◽  
Jutarut Iewkittayakorn ◽  
Kulchanart Prasertsit
Keyword(s):  
Biodiesel Production ◽  
Coffee Grounds
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