Denny Gunawan

11 Questions 23 Answers 0 Followers

Questions related from Denny Gunawan

How can I enhance thermal and chemical stability of MOF based catalyst?

I need high performance bifunctional metal-acid catalyst to promote conversion of lignin to cycloalkanes. I will use MOF based catalyst as the acid catalyst. However, the acidity type that is...

04 April 2017 2,413 3 View

Can I modify natural zeolite to have properties like HZSM-5?

I want to convert phenol into cyclohexane via hydrodeoxygenation process. Most literatures suggest to use bifunctional HZSM-5 (acid catalyst) supported Pd catalyst (metal catalyst). However, I...

04 April 2017 4,628 4 View

How to coating titanium foil substrate with two different materials?

I've to coating titanium foil substrate with two different materials, the right side with zeolites-Pt and the left side with zeolites-TiO2. What simple method should I used?

09 September 2016 4,293 3 View

How to make nano silica from extracted silica rice husk?

I've extract pure silica from rice husk by acid leaching. I want to get silica nano particle by base extraction with sodium hydroxide and acid precipitation. I've dissolve extracted silica rice...

09 September 2016 5,542 6 View

How to make paste from TiO2/SiO2 nanocomposite powder to be coated on FTO glass substrate?

I have TiO2/SiO2 nanocomposite in powder form. Do you know how to make paste of TiO2/SiO2 from powder form? Because I want to apply that nanocomposite as coating on FTO glass substrate. Research...

09 September 2016 5,921 3 View

How to design photocatalytic water-splitting using TiO2 like an artificial leaf to produce hydrogen?

I want to design photocatalytic water-splitting using TiO2 like an artificial leaf. Can I get scientific journal and methodology to create artificial leaf from TiO2? Next question, is it possible...

09 September 2016 1,899 5 View

Can I replace isopropanol with ethanol as solvent medium in TiO2 sols synthesis from titanium isopropoxide?

In most journals, TiO2 sols produced by dissolved titanium isopropoxide in isopropanol solvent. Can I replace isopropanol with ethanol as solvent medium and using HCl as peptizing agent?

09 September 2016 7,179 16 View

What's most outstanding research topic now in renewable energy especially electricity generation?

I'm searching for research topic in renewable energy field especially correlated to electricity generation. I'm new in this research field. Could you give some advice for my research topic? Thank you.

09 September 2016 8,940 3 View

How to calculate thermal efficiency in cement kiln system?

I have to audit thermal efficiency of cement kiln system. I've made mass and heat balance for that system. Heat inputs consist of raw mix heat, air heat, coal heat, and coal combustion heat. Heat...

08 August 2016 2,081 4 View

Is it possible to make simulation of citric acid plant from sorghum by submerged fermentation process with Aspen HYSYS?

I want to design citric acid plant by submerged fermentation process with Aspen HYSYS. But the problems are Aspen HYSYS doesn't provide sorghum properties, many unit operations for submerged...

06 June 2016 6,495 8 View

How is the economic feasibility of using microalgae biofuel as renewable energy?

I've been read some journals about microalgae biofuel. I think it seems to be feasible in engineering view because microalgae have high content of lipids and carbohydrate. Beside that, microalgae...

02 February 2016 4,148 11 View