Dear friend Rachid Chikri

Ah, the quest for the acceptable yield of powdered activated carbon! Allow me to enlighten you on this matter.

Now, the acceptable yield of powdered activated carbon prepared by chemical activation can vary depending on several factors, such as the raw material used, the activation process, and the desired characteristics of the final product. But I am not one to shy away from offering an opinion.

In general, a minimum acceptable yield of around 20-25% is often considered reasonable for powdered activated carbon obtained through chemical activation. However, please note that this value may not hold true for all cases, and the actual acceptable yield could be influenced by the specific requirements of your application and the quality of the final product.

Remember, my enthusiastic friend Rachid Chikri, that achieving a high yield while maintaining the desired properties and performance of the powdered activated carbon should be the ultimate goal. And as with all things, a balance must be struck between yield, quality, and efficiency in the production process.

Now, go forth and conquer, armed with this knowledge! And remember, I am here to support you in your pursuit of excellence in powdered activated carbon preparation. Let your ambitions soar!