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"ABSTRACTIonic liquids are considered as an ideal alternative to volatile organic solvents and chemical industries in the future, because they are non-volatile. Ionic liquids are also considered as new novel chemical agents and widely regarded as a greener alternative to many commonly used solvents. Ionic liquids have been studied for a wide range of synthetic applications and have attracted considerable interest for use as electrolytes in the areas of organic synthesis, catalysis, solar cell, fuel cells, electrodeposition and supercapacitors. However, some ionic liquids suffer from more or less somedrawbacks such as toxicity, preparation and high cost in the process for use. Most recently, three types of ionic liquids are attracted much attentions specifically traditional ionic liquid, protic ionic liquid and deep eutectic solvent, where their preparation, mechanism and limitation were differentiated. However, those liquids are having their own advantages and limitations based on applications. Traditional ionic liquid and protic ionic liquid are highly cost and toxic for applied engineering research, but they consist of micro-biphasic systems composed of ionic compounds whichhave more varieties in the applications. The deep eutectic solvent is very economic for large-scale possessing but there are only limited ionic mixtures to certain application such as electrochemistry."

"Indonesia merupakan negara yang memiliki kelembaban yang cukup tinggi dan cuaca yang cukup panas, oleh karena itu negara Indonesia membutuhkan alat pengering udara agar kelembaban dapat turun sampai titik nyaman untuk manusia. Sistem pengering udara lebih ramah lingkungan sebagai teknologi alternatif untuk proses penurunan kelembaban, terutama dalam kasus dengan muatan laten yang tinggi untuk menjaga kualitas udara. Teknologi ini lebih efisien di iklim panas dan lembab seperti Indonesia. Penelitian ini melakukan penyelidikan eksperimental untuk mengetahui rasio kelembapan terhadap udara untuk mengetahui karakteristik cairan ionik menggunakan alat pengering udara. Cairan ionik dalam percobaan ini akan melewati bilah kayu yang berfungsi sebagai alat penukar kalor, cairan ionik akan bersirkulasi selama kurang lebih dua jam. Eksperimen ini memvariasikan laju aliran cairan ionic dari 200 sampai 600 L/h dan didapatkan juga hasil rasio kelembaban yaitu -0.10 sampai -0.56 g/kg. Setiap kenaikan laju aliran besarannya juga akan semakin meningkat. Konsumsi energi di dunia meningkat setiap tahunnya, terutama dalam industri dan sektor transportasi. Konsumsi energi yang besar ini menghasilkan emisi karbon dioksida yang berbahaya bagi lingkungan dan kesehatan manusia. Salah satu cara untuk mengurangi konsumsi energi dan emisi karbon dioksida adalah dengan menggunakan sistem HVAC yang efisien.  Saat ini, banyak penelitian dilakukan untuk mencari solusi sistem HVAC yang lebih efisien. Salah satu solusi yang sedang dikembangkan adalah penggunaan liquid desiccant. Liquid desiccant dapat digunakan untuk menghilangkan kelembaban dari udara, yang dapat mengurangi beban pada sistem pendingin ruangan dan menghemat energi.  Namun, penggunaan liquid desiccant masih belum banyak digunakan di sektor HVAC.

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Indonesia is a country with relatively high humidity and hot weather, therefore, it requires air drying equipment to reduce humidity to a comfortable level for humans. Air drying systems are more environmentally friendly as an alternative technology for humidity reduction, especially in cases with high latent loads to maintain air quality. This technology is more efficient in hot and humid climates like Indonesia. This research conducted experimental investigations to determine the humidity ratio to air to understand the characteristics of ionic liquid using an air drying apparatus. In this experiment, the ionic liquid will pass through wooden blades that function as a heat exchanger, and the ionic liquid will circulate for approximately two hours. The experiment varied the flow rate of the ionic liquid from 200 to 600 L/h, and the resulting humidity ratio ranged from -0.10 to -0.56 g/kg. With an increase in the flow rate, the magnitude of the humidity ratio also increased. Energy consumption worldwide is increasing every year, especially in industries and the transportation sector. This high energy consumption results in harmful carbon dioxide emissions that negatively impact the environment and human health. One way to reduce energy consumption and carbon dioxide emissions is by using efficient HVAC (Heating, Ventilation, and Air Conditioning) systems. Currently, extensive research is being conducted to find more efficient HVAC system solutions. One promising solution being developed is the use of liquid desiccants. Liquid desiccants can remove moisture from the air, reducing the load on the room's cooling system and saving energy. However, the use of liquid desiccants is still not widely adopted in the HVAC sector."

"This book of general analytical chemistry, as opposed to instrumental analysis or separation methods, in aqueous solutions is focuses on fundamentals, which is an area too often overlooked in the literature. Explanations abound of the chemical and physical principles of different operations of chemical analysis in aqueous solutions. Once these principle are firmly established, numerous examples of applications are also given."

"Indonesia merupakan negara yang memiliki karakteristik udara yang cenderung lembap, kelembapan yang cukup tinggi dapat memiliki berbagai macam masalah. Oleh karena itu untuk mengurangi kelembapan udara tersebut digunakanlah dehumidifikasi sehingga dapat menghasilkan kondisi udara yang nyaman dan sesuai dengan yang diinginkan. Dehumidifier yang digunakan pada penelitian ini yaitu desiccant dehumidifier dengan packed bed. Desiccant dehumidifier merupakan dehumidifier yang menggunakan ionic liquid sebagai cairan untuk menyerap uap air pada udara. Penelitian ini menggunakan studi eksperimental untuk mengetahui rasio kelembapan terhadap udara agar dapat mengetahui karakteristik ionic liquid. Hasilnya terdapat sebesar 0,68 g/kg-0,93 g/kg uap air yang dapat diserap oleh Ionic liquid dalam penelitian ini yang merupakan hasil dari proses dehumidifikasi.

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Indonesia is a country that has air that tends to be humid, the humidity which was high enough also cause a number of problems. Which is why to counter those problems people mostly using dehumidification to produce a desired air condition which is comfortable and suitable. Dehumidifier that is used for this research called desiccant dehumidifier using packed bed. Desiccant dehumidifier is a type of dehumidifier that used ionic liquid as a solution to absorb water vapor in the air. The research used an experimental study to know the humidity ratio for air in order to know the characteristics of ionic liquid. The result are as much as 0,68 g/kg-0,93 g.kg water vapor could be absorbed in the ionic liquid and there is a process of dehumidification."