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MODIFICATION OF NATURAL ZEOLITE AS MOLECULAR SIEVE MATERIAL ON BIOETHANOL DEHYDRATION Khaidir, Khaidir; Setyaningsih, Dwi; Haerudin, Hery
Jurnal Zeolit Indonesia Vol 8, No 2 (2009)
Publisher : Jurnal Zeolit Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (409.47 KB)

Abstract

This study aimed to find a method of modification zeolite structure so it has a fit pore size to used on bioethanol dehydration process and acquiring bioethanol quality for fuel. The method used by heating the mixture of ethanol azeotropic and water at distillation flask which passed through on the column filled by zeolite molecular sieve. The result showed that zeolite modifications (ZMS) have a better characteristic for used on bioethanol dehydration process than natural zeolite. The result which obtained on dehydration process using ZMS was better rather than commercial zeolite 3 A and natural zeolite. Concentration of bioethanol obtained by using ZMS has increased 3,14%.
Peningkatan Kualitas Produk dan Manajemen Usaha Jaket dan Tas Kulit Berbasis IT Puryati, Dwi; Hanifah, Hanifah; Haerudin, Hery
Wikrama Parahita : Jurnal Pengabdian Masyarakat Vol 1, No 1 (2017)
Publisher : Universitas Serang Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (266.342 KB) | DOI: 10.30656/jpmwp.v1i1.354

Abstract

Garut city is famous for leather-based products such as jackets, bags, shoes and more. This devotional activity aims to help people who already have business to produce leather jackets and leather bags in the region of Garut, West Java in terms of improving product quality and simple IT-based bookkeeping.                            .   The two partners in this service have the same problem (1) the length of time in producing jackets and bags and the lack of care of the risliting installation (2) does not understand the simple bookkeeping that SMEs should understand, (3) lacks a simple manual or book-based bookkeeping system IT, so it can not measure the financial performance of their business such as calculating profit, calculate inventory of goods or raw materials available, calculate the assets owned. The solutions offered are (1) procurement of cangklong machine tools along with application training, (2) simple bookkeeping training, and (3) procurement of simple IT-based bookkeeping systems and their implementation training. The monitoring activities are conducted in order to monitor the success rate of the planned activities in this service, while the evaluation activities are conducted with a view to seeing the sustainability of the program by business partners, such as whether or not equipment is used to accelerate the process of sewing jackets and leather bags and system implementation simple IT-based bookkeeping.                                            . Keywords: product quality, bookkeeping system, IT
HIDROGENOLISIS METILSIKLOPENTANA PADA KATALIS 0.3% Pt/Al2O3 Haerudin, Hery
Jurnal Kimia Terapan Indonesia Vol 6, No 1-2 (1996)
Publisher : Research Center for Chemistry - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (4393.351 KB) | DOI: 10.14203/jkti.v6i1-2.235

Abstract

Hydrogenolysis of methylcyciopentane (MCP) was carried out with 0.3% Pt/Al2O3 catalyst at 210 C and 235 C in a batch reactor. Chemisorption of hydrogen and oxygen on the catalyst had also been measured. The mean value of platinum dispersion on the catalyst support measured by chemisorption technique was D = 84%. The product distribution of hydrogenolysis of MCP, namely n- hexane : 2- methylpentane : 3-methylpentane was found to be 15: 55: 30 at 210 DCand 20: 50: 30 at 235 C. The adsorption of MCP molecule at the boundary area between the metal particle and the support material was assumed to be the determining factor for that distribution profile. The activation energy (Ea) of the hydrogenolysis of MCP on this catalyst was 95 kJ/mol.
EFFECT OF THE REDUCTION TEMPERATURE INTO CATALYTIC ACTIVITY OF Ni SUPPORTED BY TiO2, AL2O2 AND TiO2/AL2O3 FOR CONVERSION CO2 INTO METHANE Haerudin, Hery; Waskitoaji, Wihatmoko; Usman, Usman
Indonesian Journal of Chemistry Vol 3, No 1 (2003)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (132.019 KB) | DOI: 10.22146/ijc.21902

Abstract

Nickel catalysts, containing 6% (w/w) of nickel, have been prepared using TiO2, Al2O3 and mixture of TiO2-Al2O3 (1:9). The catalysts were used for CO2 conversion into methane. The characteristics of catalysts were studied by determination of its specific surface area, temperature programmed reaction technique and X-ray diffraction. The specific surface area were varied slightly by different temperature of reduction, namely after reduction at 300°C it was 39, 120 and 113 m2/g and after reduction at 400°C it was 42, 135  and 120 m2/g for 6% nickel catalysts supported on TiO2, Al2O3 and mixture of TiO2-Al2O3 (1:9) respectively. Temperature program reaction studies (TPO and TPR) showed that NiTiOx species were possibly formed during the pretreatments which has shown by the shift of its peak to the lower temperature on Ni catalyst, that supported on mixture of TiO2-Al2O3 compared with catalysts supported on individual TiO2 or Al2O3. The nickel species on reduced Ni catalysts supported on TiO2 and on mixture of TiO2-Al2O3 could be detected by X-ray diffraction. The catalysts activities toward CH4 formation were affected by the reduction temperature. Activity for CH4 formation was decreased in the following order: Ni/ TiO2 > Ni/ TiO2: Al2O3 > Ni/ Al2O3 and Ni/ TiO2: Al2O3 > Ni/ TiO2> Ni/ Al2O3, when catalysts were reduced at 300°C or 400°C respectively. The CO2 conversion was decreased in the following order: Ni/ Al2O3 > Ni/ TiO2: Al2O3 > Ni/ TiO2 when catalysts were reduced at 300°C or 400°C respectively.   Keywords: nickel catalyst, carbondioxide, methane
EFFECT OF PREPARATION METHOD OF Ni CATALYST USING BENTONITE AS THE SUPPORT MATERIAL Haerudin, Hery; Tursiloadi, Silvester; Widiyarti, Galuh; Rahayu, Wuryaningsih Sri
Indonesian Journal of Chemistry Vol 3, No 2 (2003)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (260.377 KB) | DOI: 10.22146/ijc.21895

Abstract

Nickel catalyst has been prepared impregnation and precipitation with nickel content of 20% and 25% each using bentonite as support material. The effects of the preparation method were studied using temperature programmed oxidation (TPO) and temperature programmed reduction (TPR) and by determination of its specific surface area. The activity of catalysts has been tested in the hydrogenation of palm oil. The catalyst with 20% of nickel and prepared by impregnation shows a single peak at 301°C, compared to catalyst with 25% of nickel prepared by the same method which has a peak at 304°C and a shoulder at 330°C. The reduction curves of both catalysts, those are prepared by impregnation, show a homogeneity indicated by a high main peak at 426°C (20% Ni) and 430°C (25% Ni). The 25% nickel catalyst by impregnation has a shoulder at 508°C. The catalysts prepared by precipitation show peaks at 508°C and 661°C for 20% of Ni and peaks at 419°C and 511°C for 25% of Ni. The reduction curves of catalysts prepared by precipitation are significantly different from each other. Those are also very different comparing to the reduction curve of impregnated catalyst. The 20% precipitated nickel catalyst has a single peak at 540°C, but the 25% precipitated nickel catalyst shows peaks at 346°C and 503°C. The differences of peak position among the reduction curves of catalysts resulted in the differences of catalyst activities with the following order 20% Ni (impregnation) > 25% Ni (impregnation) > 20% Ni (precipitation) > 25% Ni (precipitation).   Keywords: bentonite, nickel catalyst, hidrogenation
CHARACTERIZATION OF MODIFIED BENTONITE USING ALUMINUM POLYCATION Haerudin, Hery; Rinaldi, Nino; Fisli, Adel
Indonesian Journal of Chemistry Vol 2, No 3 (2002)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (53.827 KB) | DOI: 10.22146/ijc.21913

Abstract

The modification of bentonite by pillarization using aluminum polycation type Keggin [Al13O4(OH)24(H2O)12]7+ has been carried out, by exchange of cation from interlayer with aluminum polycation. The amount of aluminum polycation, which was used for the pillaring of bentonite was varied, i.e. 5 mmol/gram, 10 mmol/gram, and 20 mmol/gram of bentonite. After drying, the pillared bentonite was calcined at 400 oC for 6 hour with temperature rate of 5 oC/min. The cationic exchange capacity (CEC) of starting bentonite was 98.3 meq/100 gram. The concentration ratio of Al/Si increased from 0.27 to 0.34 for pillared bentonite and of Ca/Si was decreased from 0.06 to 0.006 for pillared bentonite. The basal space for pillared bentonit increased significantly from 7.30 Å to about 18 Å . The measured specific surface area (by BET) of pillared bentonite was also increased significantly from 46 m2/g to about 162 m2/g. It was concluded that bentonite has been pillared by aluminum polication successfully.   Keywords: aluminum polycation, bentonite
Peningkatan Kualitas Produk dan Manajemen Usaha Jaket dan Tas Kulit Berbasis IT Puryati, Dwi; Hanifah, Hanifah; Haerudin, Hery
Wikrama Parahita : Jurnal Pengabdian Masyarakat Vol 1, No 1 (2017)
Publisher : Universitas Serang Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (266.342 KB) | DOI: 10.30656/jpmwp.v1i1.354

Abstract

Garut city is famous for leather-based products such as jackets, bags, shoes and more. This devotional activity aims to help people who already have business to produce leather jackets and leather bags in the region of Garut, West Java in terms of improving product quality and simple IT-based bookkeeping.                            .   The two partners in this service have the same problem (1) the length of time in producing jackets and bags and the lack of care of the risliting installation (2) does not understand the simple bookkeeping that SMEs should understand, (3) lacks a simple manual or book-based bookkeeping system IT, so it can not measure the financial performance of their business such as calculating profit, calculate inventory of goods or raw materials available, calculate the assets owned. The solutions offered are (1) procurement of cangklong machine tools along with application training, (2) simple bookkeeping training, and (3) procurement of simple IT-based bookkeeping systems and their implementation training. The monitoring activities are conducted in order to monitor the success rate of the planned activities in this service, while the evaluation activities are conducted with a view to seeing the sustainability of the program by business partners, such as whether or not equipment is used to accelerate the process of sewing jackets and leather bags and system implementation simple IT-based bookkeeping.                                            . Keywords: product quality, bookkeeping system, IT
ESTERIFIKASI CRUDE PALM OIL (CPO) MENGGUNAKAN KATALIS ZEOLIT ALAM TERAKTIFASI ASAM PADA PROSES PEMBUATAN BIODIESEL MELALUI METODE DUA TAHAP (ESTERIFIKASI-TRANSESTERIFIKASI) Kasim, Rahmiyati; Setyaningsih, Dwi; Haerudin, Hery
AGROINTEK Vol 5, No 1 (2011)
Publisher : University of Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/agrointek.v5i1.1938

Abstract

Biodiesel, a renewable fuel is normally produced from refine oil and methanol in the presence of a catalyst; conventionally it is used a basic homogeneous catalyst. However, when oil with high amount of free fatty acid (FFA) is used, this catalyst should not be used with the aim to avoid the production soap. In this work, FFA present in crude palm oil (CPO) were esterified with activated natural zeolite catalyst. The esterification reaction was carried out 60oC, with a  23.41 : 1 molar ratio of methanol to CPO, reaction time of 170 minute and catalyst amount of 1.59 %, conversion FFA of CPO was 64.23 %. In this work, biodiesel yield achieved was around 71.97 %.Biodiesel, a renewable fuel is normally produced from refine oil and methanol in the presence of a catalyst; conventionally it is used a basic homogeneous catalyst. However, when oil with high amount of free fatty acid (FFA) is used, this catalyst should not be used with the aim to avoid the production soap. In this work, FFA present in crude palm oil (CPO) were esterified with activated natural zeolite catalyst. The esterification reaction was carried out 60oC, with a  23.41 : 1 molar ratio of methanol to CPO, reaction time of 170 minute and catalyst amount of 1.59 %, conversion FFA of CPO was 64.23 %. In this work, biodiesel yield achieved was around 71.97 %.