KAJIAN AWAL PREPARASI KOMPOSIT ENZIM GLUKOSA OKSIDASE - BENTONIT TERMODIFIKASI TMAOH

Saat ini pemanfaatan enzim glukosa oksidase (GOD) sebagai biosensor untuk mendeteksi gula darah manusia makin berkembang. Penelitian dilakukan melalui pembuatan matriks imobilisasi enzim GOD menggunakan bentonit termodifikasi oleh perlakuan asam dan interkalasi surfaktan. Bentonit termodifikasi ini diharapkan dapat menjadi sebuah matriks imobilisasi yang dapat dipergunakan untuk memerangkap enzim glukosa oksidase (GOD) Suatu model komposit enzim dapat dikembangkan dengan memanfaatkan polimer konduktif yang berperan sebagai transduser dan akan memperkuat signal elektrokimia dari wafer enzim. Signal elektrokimia wafer enzim yang ditimbulkan oleh elektron yang dihasilkan dari reaksi enzimatis dibaca oleh alat LCR meter sebagai nilai kapasitansi. Pada penelitian ini, wafer enzim dibuat dengan berbagai variasi rasio konsentrasi Ca-bentonit:PAH yaitu 1:0, 1:1, 1:2 dan 1:3. Pengaruh penambahan polimer PAH berbagai rasio konsentrasi juga dipelajari dengan mengukur nilai kapasitansi oleh LCR meter dan nilai aktivitas menggunakan metode DNS. Selain itu juga akan dibuat sebuah membran selulosa asetat dengan berbagai variasi konsentrasi (0,5%, 1%, 1,5% dan 2%). Hasil penelitian menunjukkan bahwa penambahan PAH memberikan pengaruh terhadap aktifitas enzim, yang ditunjukkan dengan semakin menurunnya harga kapasitansinya. Dengan dihasilkannya matriks komposit bentonit termodifikasi ini diharapkan dapat meningkatkan nilai bentonit alam sebagai imobilisator berkinerja tinggi dengan harga yang relatif lebih murah dibandingkan matriks lainnya. Matriks bentonit termodifikasi ini juga diharapkan dapat dengan mudah diaplikasikan sebagai biosensor alat pengukur kadar glukosa, dan harganya lebih murah jika diproduksi masal

KINETIC INVESTIGATION OF CARBON DIOXIDE, ACETIC ACID, ACRYLIC ACID FORMATION ON DILUTED AND LEACHED MoVTeNb CATALYST

Reaction kinetics for the oxidation of propane over diluted-leached MoVTeNb is described. This paper is focused on the study of determination of the orders of carbon dioxide, acetic acid and acrylic acid formation. Deep oxidation of propane to carbon dioxide is first order with respect to hydrocarbon, and partial order (0.31) with respect to oxygen. The selective oxidation of propane to acrylic acid is partial order (0.49) with respect to hydrocarbon and partial order (0.09) with respect to oxygen

KINETIC INVESTIGATIONOF PROPANE DISAPPEARANCE AND PROPENE FORMATION IN PROPANE OXIDATIONON DILUTEDAND LEACHED MoVTeNb CATALYST

ABSTRACT Reaction kinetics for the oxidation of propane over diluted-leached MoVTeNb is described. This paper is focused on the study of products selectivity profile and determination of the orders of propane disappearance and propene formation. The result shows that selective oxidation of propane to propene over this catalyst follows the Langmuir-Hinshelwood mechanism. The disappearance of propane is first order with respect to hydrocarbon and partial order (0.21) with respect to oxygen. The propene formation is first order with respect to hydrocarbon and not depending on oxygen concentration. Keywords: propane oxidation, propane disappearance, prop~ne formation, kinetic, reaction orde

Kinetic Investigation of Propane Disappearance and Propene Formation in Propane Oxidation on Diluted and leached MoVTeNb Catalyst

Reaction kinetics for the oxidation of propane over diluted-leached MoVTeNb is described. This paper focused on the study of products selectivity profile and determination of the orders of propane disappearance and propene formation. the propane disappearance is first order with respect to hydrocarbon and partial order (0.21) with respect to oxygen. The propene formation is first order with respect to hydrocarbon and not dependeing on oxygen concentratio

Pillared Interlayered Clays (PILCs): Harnessing Their Potential as Adsorbents and Catalysts - A Mini Review

The Pillared Interlayered Clays (PILCs) have attracted significant attention in recent years due to their versatile applications as adsorbents and catalysts in various environmental and industrial processes. This mini review presents a comprehensive overview of the recent researches conducted on PILCs and highlights their potential as effective materials for pollutant removal and catalytic reactions, with a particular focus on the principles of green chemistry. The review begins by introducing the basic concept of PILCs, emphasizing the importance of interlayer pillaring to enhance their structural stability and surface area. PILCs offer a greener alternative to traditional adsorbents and catalysts by providing high adsorption capacity and catalytic activity with lower environmental impacts. The catalytic applications of PILCs in green chemistry are also explored. Their unique structural features, such as tunable acidity and porosity, enable efficient catalytic reactions while minimizing the use of toxic or harmful substances. This mini review provides a concise yet comprehensive summary of the recent advancements in the research on PILCs as adsorbents and catalysts, with a focus on green chemistry principles. PILCs offer great potential as sustainable alternatives for pollutant removal and catalytic reactions, aligning with the goals of green chemistry to minimize environmental impact and promote sustainable development. Further research and development efforts are required to fully harness the green potential of PILCs and facilitate their practical and commercial applications in various industrie

Pemanfaatan Material Anorganik: Pengenalan dan Beberapa Inovasi di Bidang Penelitian

Di dalam buku ini mencoba memaparkan beberapa hal terkait dengan material terutama material anorganik meskipun disajikan secara ringkas. Buku ini juga mencoba memberikan contoh dan pembahasan pemanfaatan dan penerapan teknologi sintesis/modifikasi material di bidang fenomena permukaan terutama bidang katalisis. Buku ini sangat sesuai terutama bagi mahasiswa yang mengambil jurusan kimia, teknik kimia, maupun bidang eksakta lainnya yang terkait pemanfaatan material di bidang katalisis. Pada buku ini pembahasan dibagi ke dalam beberapa bab bahasan. Pada bab pertama ditekankan pada pengantar dan pengenalan mengenai material terutama material anorganik. Pada bab kedua lebih difokuskan pada pengertian dan konsep tentang adsorpsi dan katalisis. Pada bab ketiga dan keempat merupakan bahasan inti, yaitu mengenai penerapan dan pemanfaatan material anorganik di bidang katalisis. Bab ketiga lebih fokus pada pemanfaatan oksida logam untuk katalis oksidasi propana, sedangkan bab empat lebih fokus pada pemanfaatan material anorganik alam (lempung) untuk berbagai aplikasi katalitik. Secara umum, pada dua bab awal buku ini merangkum pemikiran-pemikiran beberapa penulis terdahulu, sehingga dalam bahasannya banyak merujuk dari hasil pemikiran beberapa. Sedangkan contoh-contoh penerapan dan pemanfaatan material anorganik yang tertulis pada bab tiga dan empat sebagai sarana untuk memperjelas bahasan merupakan hasil penelitian dan bahasan hasil penelitian yang telah dilakukan oleh penulis dan rekan-rekan

CATALYTIC ACTIVITY TEST OF Mo-V-Te-Nb-OXIDE IN AMMOXIDATION OF PROPANE TO ACRYLONITRILE

The ammoxidation of propane has been investigated at a multicomponent oxidic, MoVTeNb catalyst in the temperature of 673 K. The catalyst was prepared by sol-gel method, and dried by spray dried method. The activity test of the catalyst has been carried out using micro reactor and showed that it was active for ammoxidation of propane to acrylonitrile

The Influence of water and catalyst leach process toward propane oxidation on MoVTeNb catalyst

The effect of the water stream to the propane oxidation on diluted MoVTeNb catalyst has been investigated. The present work has elucidated that careful operation of high throughput instrumentation can be used in various beneficial ways to speed up the discovery process of improved catalysts in other forms than enabling efficient trial-and-error testing of compositional variations of a given catalyst system. The result shows that the addition of massive amounts of water to the feed should have a negative influence on the kinetics, as water will compete with all other polar molecules in the system for adsorption sites. This work also investigated the effect of catalyst leach process toward propane oxidation. From the result, it can be described that catalyst leach process tends to reduce the phase of the catalyst that responds to the total oxidation of propane. This work also proposed the reaction network and gave the comparison between the propane oxidation reaction kinetic using leached and un-leached catalyst. The result showed that the activation energy of the acrylic acid formation on the leached catalyst was slightly higher than that of on un-leached catalyst. On the other hand, the activation energy of the carbon dioxide formation on the leached catalyst was much higher than that of on un-leached catalyst. It can be described that the leaching process to the catalyst can reduce the phase of the catalyst responsible for the total oxidation of propane

Menggelorakan Penelitian; Pengenalan dan Penuntun Pelaksanaan Penelitian

Buku ini mencoba memaparkan segala hal terkait dengan penelitian meskipun disajikan secara ringkas. Buku ini juga mencoba memberikan arahan langkah demi langkah terkait dengan pelaksanaan penelitian, terutama bagi mahasiswa dan pemula. Buku ini tidak membatasi metodologi penelitian hanya pada bidang eksakta maupun sosial, namun mencoba melingkupi kedua bidang tersebut sebagai pengenalan dan pengantarnya. Buku ini merupakan penyempurnaan dan revisi dari buku yang pernah diterbitkan sebelumnya dengan judul Asas Metodologi Penelitian: Sebuah Pengenalan dan Penuntun Langkah demi Langkah Pelaksanaan Penelitian yang diterbitkan Graha Ilmu tahun 2010. pada buku ini telah dilengkapi dengan beberapa soal untuk dipelajari di hampir semua bab, untuk memudahkan pembaca dari kalangan mahasiswa untuk dapat mereview bacaannya bab per bab. Selain itu juga ditambahkan beberapa penelitian yang telah kami lakukan untuk memperkuat contoh bahasan di bab tertentu. Pada bahasan mengenai etika penelitian juga telah ditambahkan sub bahasan mengenai etika terhadap penggunaan hewan coba.. Pada buku ini juga ditambahkan bagian epilog yang merupakan kumpulan soal atau ringkasan kasus untuk digunakan sebagai diskusi dan analisa lebih dalam

The Influence of water and catalyst leach process toward propane oxidation on MoVTeNb catalyst

The effect of water stream to the propane oxidation on diluted MoVTeNb catalyst has been investigated. The present work has elucidated that careful operation of high throughput instrumentation can be used in various beneficial ways to speed up the discovery process of improved catalysts in other forms than enabling efficient trial-and error testing of compositional variations of a given catalyst system. The result show that the addition of massive amounts of water to the feed should have a negative influence on the kinetics, as water will compete with all other polar molecules in the system for adsorption sites. This work also investigated the effect of catalyst leach process toward propane oxidation. From the result, it can be described that catalyst leach process tends to reduce the phase of the catalyst that responsible to the total oxidation of propane. This work also proposed the reaction network and gave the comparison between the propane oxidation reaction kinetic using leached and un-leached catalyst. The result showed that the activation energy of the acrylic acid formation on leached catalyst was slightly higher than that of on un-leached catalyst. On the other hand, the activation energy of the carbon dioxide formation on leached catalyst was much higher than that of on un-leached catalyst. It can be described that leaching process to the catalyst can reduce the phase of the catalyst that responsible for the total oxidation of propane