A nano-sized solid acid synthesized from rice hull ash for biodiesel production

RSC Advances ◽  
2014 ◽  
Vol 4 (39) ◽  
pp. 20535-20539 ◽  
Author(s):  
Danlin Zeng ◽  
Shenglan Liu ◽  
Wanjun Gong ◽  
Hongxiang Chen ◽  
Guanghui Wang
Keyword(s):  
Amorphous Silica ◽  
Solid Acid ◽  
Biodiesel Production ◽  
Rice Hull ◽  
Acid Activation ◽  
Rice Hull Ash ◽  
Excellent Activity

A nano-sized solid acid was synthesized from rice hull ash by acid activation. The solid acid is amorphous silica with -OH and -SO3H functional acid groups, and this catalyst exhibits excellent activity and recyclability for biodiesel production.

scholarly journals Nanoporous Silica Polyamine Composites for Metal Ion Capture From Rice Hull Ash

2010 ◽  
Vol 12 (2) ◽  
pp. 123
Author(s):  
Matt Berlin ◽  
Jesse Allen ◽  
Varadharajan Kailasam ◽  
David Rosenberg ◽  
Edward Rosenberg
Keyword(s):  
Amorphous Silica ◽  
Solid State Nmr ◽  
Metal Ion ◽  
Silica Gels ◽  
Rice Hull ◽  
Nanoporous Silica ◽  
Rice Hull Ash ◽  
Sem Images ◽  
Silica Polyamine Composites ◽  
Nmr Techniques

Rice Hull Ash (RHA) was converted to amorphous silica gel using a modified version of published literature procedures. The gels were characterized by a comparison of their CPMAS [29] Si NMR and Scanning Electron Microscopy (SEM) images with commercial silica gels. The resulting gels were silanized with a 7.5:1 mixture of methyltrichlorosilane and chloropropyltrichlorosilane and then reacted with poly(allylamine) (PAA) to produce the silica polyamine composite (SPC) BP-1. The BP-1 was then further modified with pyridine-2-carboxaldehyde to form the copper selective SPC, CuSELECT. This procedure follows that used to produce the commercialized version of these composite materials from commercially available amorphous silica gels. The composites were characterized by solid state NMR techniques, elemental analysis, SEM, porosimetry, and metal ion capacity and selectivity. The overall goal of the project was to determine the feasibility of using RHA to make SPC. The observed strengths and weaknesses of this approach are discussed.

Amorphous Silica from Rice Hull Ash as a Filler Material for Dental Composites

2013 ◽  
Vol 19 (12) ◽  
pp. 3647-3651
Author(s):  
Yeliz Basaran-Elalmis ◽  
Sevil Yucel ◽  
Ismail Aydin ◽  
Bilge Sema Tekerek
Keyword(s):  
Amorphous Silica ◽  
Dental Composites ◽  
Filler Material ◽  
Rice Hull ◽  
Rice Hull Ash

Effect of Acid Activation on Sesame Oil Bleaching by Rice Hull Ash.

2001 ◽  
Vol 34 (1) ◽  
pp. 1-6 ◽  
Author(s):  
YU-YANG CHANG ◽  
CHUN-I LIN ◽  
HSI-KUEI CHEN
Keyword(s):  
Sesame Oil ◽  
Rice Hull ◽  
Acid Activation ◽  
Rice Hull Ash

Water filtration using rice hull ash

Waterlines ◽  
1983 ◽  
Vol 2 (2) ◽  
pp. 21-23 ◽  
Author(s):  
Barnes ◽  
Mampitiyarachichi
Keyword(s):  
Water Filtration ◽  
Rice Hull ◽  
Rice Hull Ash

Synthesis and Characterization of Heterogeneous Solid Acid Catalyst from Alstonia Scolaris Stalks for Biodiesel Production using Waste Cooking Oil

2020 ◽  
Vol 10 ◽  
Author(s):  
Charishma Venkata Sai Anne ◽  
Karthikeyan S. ◽  
Arun C.
Keyword(s):  
Reaction Time ◽  
Solid Acid ◽  
Solid Acid Catalyst ◽  
Acid Catalyst ◽  
Waste Cooking Oil ◽  
Biodiesel Production ◽  
Wood Biomass ◽  
Waste Wood ◽  
X Ray ◽  
Cooking Oil

Background: Waste biomass derived reusable heterogeneous acid based catalysts are more suitable to overcome the problems associated with homogeneous catalysts. The use of agricultural biomass as catalyst for transesterification process is more economical and it reduces the overall production cost of biodiesel. The identification of an appropriate suitable catalyst for effective transesterification will be a landmark in biofuel sector Objective: In the present investigation, waste wood biomass was used to prepare a low cost sulfonated solid acid catalyst for the production of biodiesel using waste cooking oil. Methods: The pretreated wood biomass was first calcined then sulfonated with H2SO4. The catalyst was characterized by various analyses such as, Fourier-transform infrared spectroscopy (FTIR), Scanning Electron Microscopy (SEM), Energy Dispersive X-Ray Spectroscopy (EDS) and X-ray diffraction (XRD). The central composite design (CCD) based response surface methodology (RSM) was applied to study the influence of individual process variables such as temperature, catalyst load, methanol to oil molar ration and reaction time on biodiesel yield. Results: The obtained optimized conditions are as follows: temperature (165 ˚C), catalyst loading (1.625 wt%), methanol to oil molar ratio (15:1) and reaction time (143 min) with a maximum biodiesel yield of 95 %. The Gas chromatographymass spectrometry (GC-MS) analysis of biodiesel produced from waste cooking oil was showed that it has a mixture of both monounsaturated and saturated methyl esters. Conclusion: Thus the waste wood biomass derived heterogeneous catalyst for the transesterification process of waste cooking oil can be applied for sustainable biodiesel production by adding an additional value for the waste materials and also eliminating the disposable problem of waste oils.

scholarly journals Solid Reactant-Based Geopolymers from Rice Hull Ash and Sodium Aluminate

2016 ◽  
Vol 8 (6) ◽  
pp. 2131-2140 ◽  
Author(s):  
Ailar Hajimohammadi ◽  
Jannie S. J. van Deventer
Keyword(s):  
Sodium Aluminate ◽  
Rice Hull ◽  
Rice Hull Ash ◽  
Solid Reactant

Study on the solid acid catalysts in biodiesel production from high acid value oil

2013 ◽  
Vol 19 (4) ◽  
pp. 1413-1419 ◽  
Author(s):  
Rizwan Sheikh ◽  
Moo-Seok Choi ◽  
Jun-Seop Im ◽  
Yeung-Ho Park
Keyword(s):  
Solid Acid ◽  
Acid Value ◽  
Biodiesel Production ◽  
Solid Acid Catalysts ◽  
Acid Catalysts ◽  
High Acid

Solid Acid Catalyst for Biodiesel Production from Waste Used Cooking Oils

2009 ◽  
Vol 48 (20) ◽  
pp. 9350-9353 ◽  
Author(s):  
Cholada Komintarachat ◽  
Sathaporn Chuepeng
Keyword(s):  
Solid Acid ◽  
Solid Acid Catalyst ◽  
Acid Catalyst ◽  
Biodiesel Production ◽  
Cooking Oils

scholarly journals The Effect of Co-solvent on Esterification of Oleic Acid Using Amberlyst 15 as Solid Acid Catalyst in Biodiesel Production

2018 ◽  
Vol 156 ◽  
pp. 03002
Author(s):  
Iwan Ridwan ◽  
Mukhtar Ghazali ◽  
Adi Kusmayadi ◽  
Resza Diwansyah Putra ◽  
Nina Marlina ◽  
...  
Keyword(s):  
Oleic Acid ◽  
Fatty Acid ◽  
Free Fatty Acid ◽  
Solid Acid ◽  
Solid Acid Catalyst ◽  
Acid Catalyst ◽  
Biodiesel Production ◽  
Molar Ratio ◽  
Amberlyst 15 ◽  
Acid Esterification

The oleic acid solubility in methanol is low due to two phase separation, and this causes a slow reaction time in biodiesel production. Tetrahydrofuran as co-solvent can decrease the interfacial surface tension between methanol and oleic acid. The objective of this study was to investigate the effect of co-solvent, methanol to oleic acid molar ratio, catalyst amount, and temperature of the reaction to the free fatty acid conversion. Oleic acid esterification was conducted by mixing oleic acid, methanol, tetrahydrofuran and Amberlyst 15 as a solid acid catalyst in a batch reactor. The Amberlyst 15 used had an exchange capacity of 2.57 meq/g. Significant free fatty acid conversion increments occur on biodiesel production using co-solvent compared without co-solvent. The highest free fatty acid conversion was obtained over methanol to the oleic acid molar ratio of 25:1, catalyst use of 10%, the co-solvent concentration of 8%, and a reaction temperature of 60°C. The highest FFA conversion was found at 28.6 %, and the steady state was reached after 60 minutes. In addition, the use of Amberlyst 15 oleic acid esterification shows an excellent performance as a solid acid catalyst. Catalytic activity was maintained after 4 times repeated use and reduced slightly in the fifth use.

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