No abstract

Co-gasification contributes significantly to the generation of hydrogen-rich syngas since it not only addresses the issue of feedstock variation but also has synergistic benefits. In this article, recent research on hydrogen concentration and yield, tar content, gasification efficiency, and carbon conversion efficiency is explored systematically. In feedstocks with high water content, steam gasification and supercritical hydrothermal gasification technologies are ideal for producing hydrogen at a concentration of 57%, which can be increased to 82.9% using purification technology. Carbonized coals, chars, and cokes have high microwave absorption when used as feedstocks. Moreover, coconut activated carbon contains elements that provide a high tan δ value and are worthy of further development as feedstocks, adsorbents or catalysts. Meanwhile, the FeSO4 catalyst has the greatest capacity for storing microwave energy and producing dielectric losses; therefore, it can serve as both a catalyst and microwave absorber. Although microwave heating is preferable to conventional heating, the amount of hydrogen it generates remains modest, at 60% and 32.75% in single-feeding and co-feeding modes, respectively. The heating value of syngas produced using microwaves is 17.44 MJ/m³, much more than that produced via conventional heating. Thus, despite a lack of research on hydrogen-rich syngas generation based on co-gasification and microwave heating, such techniques have the potential to be developed at both laboratory and industrial scales. In addition, the dielectric characteristics of feedstocks, beds, adsorbents, and catalysts must be further investigated to optimize the performance of microwave heating processes.

In developing the 4.0 industrial revolution era, vehicle body repair manufacturing companies are required to carry out technological innovations to support effective and efficient performance. One way is in the metal forming process, namely by changing the metal's shape into a variety of products by the company to increase the selling value of the material. The method of forming metal or these materials uses a bead roller machine with a compressive force to carry out the forming process on sheet metal plates according to the size of the tools' geometry and shape. The design of this bead roller machine is operated by using an electric motor with a power of 0.5 HP, using an Alternating Current (AC) voltage, the thickness of the iron frame dimensions of 1.2 cm, and using a reducer with a ratio of 1: 100. Selection of engine parts such as shafts, bearings, tools, and sprockets using materials that are economical and easy to obtain. The design uses Autocad 2014 Software, starting with designing a bead roller machine design paying attention to the strength of the materials used, then assembling the components and the machine's electrical system. The result of this design will be displayed by performing the bead roller machine performance. This bead roller can increase work productivity efficiently and effectively concerning sheet metal media for vehicle body repair compared to manual roll bending tools.

Aluminum is a non-ferrous metal that is widely used in everyday life, both on a large and small industrial scale as well as a household scale. In this research, used diesel motor piston material for casting screw. The addition of 0.1%, 0.3% Titanium Boron (Ti-B) and 0.1%, 0.3% Magnesium (Mg) for screw making by casting is expected to improve the physical and mechanical properties of the material. Tests carried out in this research are to wear testing and microstructure. The analysis of the results of this wear test shows that the aluminum alloy for making screws with the addition of 0.1% Titanium-Boron (TiB) and 0.1% Magnesium (Mg) has a better wear resistance, which is 1.154 mm² / kg compared to the addition of the element 0.3% Titanium-Boron (TiB) and 0.3% Magnesium (Mg) and without the addition of any elements which have wear resistance values of 1.252 mm² / kg and 1.596 mm² / kg, respectively. Microstructure testing shows the grain structure in aluminum alloy from casting results with the addition of Ti-B and Mg elements getting smaller and denser. This proves that the more elements of Ti-B and Mg added to the casting of aluminum alloys, the smaller the structure of the grain will be and will affect the mechanical properties of the screw.

Design of the red ginger powder production machine aims to increase UMKM(Usaha Mikro Kecil dan Menengah) in the Yogyakarta area. By making a semiautomatic red ginger powder machine, it can increase production capacity and improve the economy for UMKM. Component design is divided into 3 processes, namely; designing the frame, designing the stirring shaft, and designing the cooking tank. There are first adjusted to the design that has been made using the solid works software which is then applied by assembling other components. The drive system on the powdered red ginger production machine uses an AC electric motor which is then forwarded into the v-belt transmission then the output from the transmission is forwarded to the stirring shaft.