Thermal decomposition of Gayo Arabica coffee-pulp in a segmented chamber

Abstract

This paper reports experimental investigation on slow pyrolysis process of Gayo Arabica coffee-pulp with a target of biochar quality improvement. Investigation started with preparing the design, fabrication and testing of a-pilot-scale batch reactor. Later, the reactor was modified by placing stainless-steel trays to split the reactor into three zones. The performance of reactor after modification was examined and compared it with data gained from un-modified reactor. Temperature profile and product distribution have been observed during slow pyrolysis process of coffee-pulp in order to evaluate the performance of reactor. Results show that installing trays inside the reactor improves heat distribution and diffusion of hot gasses through the chamber. Segmented reactor demonstrated a more stable in temperature changes during pyrolysis experiment. Enhanced yield of biochar up to 42.87 % is gained during pyrolysis experiment in segmented reactor. Investigation on characteristic of biochar suggests less impurity has been found from modified reactor product.

The Physical and Chemical Properties of Activated Nanocarbon produced from Robusta (Coffea Canephora) Coffee Pulp under slow pyrolysis method

“…Although in this study, the nitrogen absorption test at low pressure was more supportive of the desorption value. The highest surface area value was shown by the coffee pulp sample pyrolyzed at a temperature of 400 o C. An increase in this pyrolysis temperature to 500 o C reduces the surface area of the sample and the formation of carbon with surface pores due to high temperatures which burn raw materials (Raihan;Setiawan;Hakim, 2020).…”

“…It was cleaned of dirt and dried under the sun until it reached a moisture content of 5% to 10%. Afterward, the CP weighed three kg and was placed in the pyrolysis reactor for the carbonization process (Raihan;Setiawan;Hakim, 2020). CP Heating was carried out in the reactor at 400 ºC and 500 ºC for 3 hours and cooled to room temperature.…”

“…Furthermore, the second stage of the coffee pulp mass loss process occurs within a temperature range of 252 ºC -395 ºC with a mass reduction of nearly 40%. There is a massive devolatilization process of the coffee pulp constituent materials such as carbohydrates, lipids, some proteins, and lignin (Setiawan et al, 2020). The third stage occurred until a temperature of 600 ºC was reached where little material was lost through burning.…”

“…Furthermore, the carbonization process of Gayo Robusta coffee (Coffea canephora) from plantations in the Bener Meriah Regency was carried out through the slow pyrolysis method. This process showed a promising potential for the utilization of coffee waste as a raw material in the manufacture of activated carbon used as adsorbents (Raihan;Setiawan;Hakim, 2020). However, it is still necessary to further examine the effect of pyrolysis temperature and activating agent on the physical and chemical properties of activated carbon derived from Robusta Gayo coffee pulp.…”

Pyrolyzed Bio Charcoal Briquettes Of Solid Waste From Lhokseumawe Patchouli Oil Refinery

“…The greater the burning speed, the shorter the briquette will burn. The combustion speed value is obtained from the dry weight of the briquette divided by the time of burning the briquette until it runs out into ash [15].…”